Harry Sintonen

Infosec consultant at REVƎЯSEC https://reversec.com - Coding, Research + various other interests

PGP: https://sintonen.fi/pgpkey.txt
Research: https://sintonen.fi/advisories/
Github: https://github.com/piru

Public Key

npub1te8autgg59arf0mh8smt34fup3780r5eskhedt360njqfw3hd9qqkcpgc3

NIP-05 Address

[email protected]

Profile Code

nprofile1qqs9un7795y2z735hamncd4c657qclrh36vcttuk4ca8eeqyhgmkjsqprpmhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmntc9l5ku

Publishing to

relay.momostr.pink

Author Public Key

npub1te8autgg59arf0mh8smt34fup3780r5eskhedt360njqfw3hd9qqkcpgc3

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Last Notes

2026-04-13 18:22:20 CEST

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The fraud is limited by the fact that this system can only be exploited when the network connection is down. There also is limits for the amounts you can "credit", I believe.

2026-04-13 15:30:18 CEST

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Agreed. Currently only 37% of payments use national systems (and it's unclear how much dependencies on US systems those might have). https://www.ecb.europa.eu/press/pr/date/2025/html/ecb.pr250228_1~7f0697af45.en.html

2026-04-13 14:10:46 CEST

Finland, Denmark, Norway, Sweden, and Estonia are soon enabling offline debit card payments for at least seven days without network connectivity. The change covers payments for essential goods in physical trade, such as food, medicine, and fuel. Each country has made - or is in the process of making - the required changes to their related regulations to enable it.
The motivation for this change is to enable payments even in exceptional situations such as network disruptions due to sabotage or conflict. TL;DR: You can pay for essentials even if Russia cuts the cables.
Plans for this change were announced in May 2025: https://www.reuters.com/business/finance/nordics-estonia-plan-offline-card-payment-back-up-if-internet-cut-2025-05-07/
#resilience #preparedness #infrastructure #payments #banking

2026-03-26 00:47:28 CET

#Microsoft sent an email to everyone saying they're listening to people now and they will definitely not pushing AI to everything anymore.
Also Microsoft enabled #github to collect all your "inputs, outputs and associated context to train and improve AI models". This new tickbox is enabled by default, even if you explicitly disabled Copilot before.
Actions speak louder than words.
You can disable the option at https://github.com/settings/copilot/features
#enshittification
https://media.infosec.exchange/infosec.exchange/media_attachments/files/116/292/469/927/816/620/original/b94d62d045955444.png

2026-03-19 14:10:07 CET

The two largest retailing organisations (and many other companies) in Finland have special responsibilities during a crisis. The operations will need to continue even in the case of emergencies or war. The crisis operations are practised periodically, too, rather than just being some words on paper.
Many large companies in specific fields (such as S-Ryhmä and Kesko) have a legal obligation to do so, but about 1500 companies contribute on a volunteer basis via a network managed by the National Emergency Supply Agency. The companies participate through ~30 sector-specific pools, which include the Logistics Pool (supply chain optimisation), the Finance Pool (continuity of payment systems and banking services), and the Energy Pool (energy system resilience), among others.
https://www.bbc.com/news/articles/cly1mg3zy20o
#preparedness

2026-02-27 11:39:37 CET

This should be obvious for everyone by now, but if you're not from US you must assume that all your use of US AI services (#ChatGPT, #Claude, #Gemini etc) is fed directly to US intelligence services.
"We may share your Personal Data, including information about your interaction with our Services, with government authorities ... in compliance with the law (i)" (OpenAI)
"We may disclose personal data to governmental regulatory authorities as required by law" (Claude)
"We will share personal information outside of Google ... to: Respond to any applicable law, regulation, legal process, or enforceable governmental request" (Gemini)
The amount of valuable information fed to the systems voluntarily is staggering. It's not a matter of "if" it is happening, but "of course it is". It would be outright negligent if they weren’t capturing and disseminating it all.
https://en.wikipedia.org/wiki/Foreign_Intelligence_Surveillance_Act#Without_a_court_order
https://en.wikipedia.org/wiki/Foreign_Intelligence_Surveillance_Act#Amendments
#privacy

2026-02-26 12:53:00 CET

Retroactively changing the role of a token or key is a very bad idea.
https://trufflesecurity.com/blog/google-api-keys-werent-secrets-but-then-gemini-changed-the-rules
#google #googleapikeys #infosec #cybersecurity

2026-02-18 16:32:23 CET

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So could you ice skate on the ice? Yes, but only if there's no snow on the ice. In addition, there are rougher patches of packed ice that can't be skated. The shipping lanes also pose a challenge since you need a way to cross them safely. This is definitely something that should not be attempted unless you know exactly what you're doing.
Couple of guys tour skated from mainland Finland to Åland islands: https://www.youtube.com/watch?v=r16NdjXhTHw
Finally, a word of warning: Avoid traversing the ice unless you know for sure where the safe routes are. The ice can be much thinner near drainages, near currents, under bridges, near shipping lanes, etc. Here are a bunch of safety tips: https://www.luontoon.fi/en/articles/safely-on-the-ice
#tourskating #adventure

2026-02-18 13:51:52 CET

The Baltic Sea hasn't had this much ice since 2011.
Ice chart: https://cdn.fmi.fi/marine-observations/products/ice-charts/latest-full-color-ice-chart.pdf
#balticsea #winter #weather
https://media.infosec.exchange/infosec.exchange/media_attachments/files/116/091/708/601/631/372/original/6366592bff57c8f4.png

2026-02-10 09:10:03 CET

I've categorically stopped using any services that have started to require me to share a picture of my passport, driver's license or my face to continue using them.
#privacy

2026-02-06 15:35:43 CET

Apparently AMD's AutoUpdate downloads the updates over HTTP and executes them without any validation (presumably as SYSTEM user). AMD was notified of the vulnerability but according to them "attack requiring physical access to victim's computer/device, man in the middle or compromised user accounts" are out of scope.
Madness.
source: https://web.archive.org/web/20260206152314/https://mrbruh.com/amd/
#vulnerability #infosec #cybersecurity

2026-02-06 14:46:32 CET

There's a Finnish citizens’ initiative for digital sovereignty. The initiative proposes a law to outlaw the use of non-EU service providers and software for critical government functions. More details at https://www.kansalaisaloite.fi/fi/aloite/16691 (in finnish) https://www.kansalaisaloite.fi/sv/initiativ/16691 (in swedish)
Meanwhile, Meta blocked the Threads account of the initiative: https://mementomori.social/@digitaalinenitsenaisyys/116022479606183593
#citizensinitiative #digitalsovereignty
#note1s7d…l5mu

2026-02-02 09:26:04 CET

Apparently a state-sponsored group was using Notepad++ update functionality to infect targeted people.
"According to the former hosting provider, the shared hosting server was compromised until September 2, 2025. Even after losing server access, attackers maintained credentials to internal services until December 2, 2025, which allowed them to continue redirecting Notepad++ update traffic to malicious servers."
source: https://notepad-plus-plus.org/news/hijacked-incident-info-update/
#infosec #cybersecurity

2026-01-29 01:03:21 CET

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> but where do you register your domain?
From myself since I'm a registrar.
This is possible with Finnish Transport and Communications Agency, so I'm opting for this.
> Even if you point it at your nameservers, it sits with someone.
I host my own nameservers, too.

2026-01-28 18:01:29 CET

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This, among some other factors, is the reason my I've self-hosted for a long time now.
https://infosec.exchange/@harrysintonen/115916299816297773
#note1y4l…g7gj

2026-01-28 15:16:00 CET

It was interesting to read up on the AI assisted code review at https://www.lesswrong.com/posts/7aJwgbMEiKq5egQbd/ai-found-12-of-12-openssl-zero-days-while-curl-cancelled-its
For context: I'm personally responsible for at least 29 curl CVEs. Out of the recent 6 CVEs mentioned in the blog post I found two. This gives me some perspective, I think.
I do not utilise AI tools in my vulnerability research. I am also fiercely critical of harmful proliferation of AI. This is due to the unsustainable way it is currently pushed, and use of as marketing ploy and gimmick rather than producing measurable benefit to users. This leads to negative impacts on economy, education & learning, not to mention impacts to nature due to wasteful use of energy.
This doesn't mean I am against AI. I have written by own AI tooling (fully local RAG with support for arbitrary number of models running on local nodes, implemented in python). I found the usefulness of such tool to be limited at best. It is somewhat useful in mass analysis of large document bases, but the level of analysis is superficial at best. These AI models are after all just language models, and do not have any true understanding or intelligence.
And here is the gist of it: The current tools are not intelligent. Understanding this limitation is the key of successful deployment and utilisation of AI tools. The tools can be useful in certain tasks, but they do not replace true intelligence.
The AI tooling AISLE are developing certainly is one of the better uses of AI, and definitely surpasses all my personal dabbling around it. It is clear that the tool does find vulnerabilities. The key question is how much hallucinations and false positives it produces: If the tool generates thousands of FPs and the true findings are hidden among them this limits the value and usefulness of the tool (of course it doesn't entirely negate it, many tools produce false positives). In short: The quality of the findings is key, and poor signal-to-noise ratio is highly undesirable.
Either way, I think there is a future for AI tools and they definitely will be helpful in vulnerability research.
I personally will keep exercising my wetware for this work, however.
#cybersecurity #infosec #vulnerabilityresearch #thoughtoftheday

2026-01-18 14:19:27 CET

I've self-hosted for decades. I host my own web sites, email, calendar, contacts, backups, file sharing, VPN etc. Kind of personal #digitalsovereignty.
Obviously, the reasons for this have nothing to do with politics or short-term developments. However, at times like this, it sure is nice to have one less thing to worry about.

2026-01-08 10:04:11 CET

No, there's no major security vulnerability in zlib.
There's a stack buffer overflow in the contrib/untgz tool. However, these tools are unsupported as described by the README.contrib file: https://github.com/madler/zlib/blob/develop/contrib/README.contrib
"
All files under this contrib directory are UNSUPPORTED. They were
provided by users of zlib and were not tested by the authors of zlib.
Use at your own risk. Please contact the authors of the contributions
for help about these, not the zlib authors. Thanks.
"
#infosec #cybersecurity

2026-01-07 08:51:27 CET

#curl 8.18.0 has been released. This release fixes 1 medium and 5 low level vulnerabilities:
- CVE-2025-14017: broken TLS options for threaded LDAPS https://curl.se/docs/CVE-2025-14017.html
- CVE-2025-14524: bearer token leak on cross-protocol redirect https://curl.se/docs/CVE-2025-14524.html
- CVE-2025-14819: OpenSSL partial chain store policy bypass https://curl.se/docs/CVE-2025-14819.html
- CVE-2025-15079: libssh global knownhost override https://curl.se/docs/CVE-2025-15079.html
- CVE-2025-15224: libssh key passphrase bypass without agent set https://curl.se/docs/CVE-2025-15224.html
I discovered the last 2 vulnerabilities.
Download curl 8.18.0 from https://curl.se/download.html
#vulnerabilityresearch #vulnerability #cybersecurity #infosec

2025-11-14 20:51:44 CET

It's good to see at least some challenges to the Anthropic claims that "AI-assisted attack was 90% autonomous". https://arstechnica.com/security/2025/11/researchers-question-anthropic-claim-that-ai-assisted-attack-was-90-autonomous/ - Unfortunately majority of media outlets are parroting these #cyberslop claims unchallenged.
The report by Anthropic makes some fantastical claims and conclusions based on those claims. In the end while the threats are there, they’re mostly unrelated to AI or LLM use.
Pouring more money into AI companies isn't a magic solution. There's better use for this budget: Invest it in doing what you have been doing all along - Maintain good visibility and understanding of your environments and associated software solutions, patch your systems in a timely manner, perform periodic security assessments (internal or external), detect and respond to threats. AI or LLM are not magic and can't exploit vulnerabilities that are not there.

2025-11-12 00:02:24 CET

This is a reminder to everyone that security is more than just memory safety. https://www.phoronix.com/news/sudo-rs-security-ubuntu-25.10
#rust #vulnerability #sudo_rs

2025-11-07 13:20:54 CET

If you have ever wondered why #Facebook seems either to ignore or fail to remove obvious scammers when you report them - well, there's a reason for it: They make a huge profit for Facebook.
If you believe Facebook has now stopped or will in future stop this practice now that they've been exposed, you're way too trusting.
https://arstechnica.com/tech-policy/2025/11/bombshell-report-exposes-how-meta-relied-on-scam-ad-profits-to-fund-ai/ "Bombshell report exposes how Meta relied on scam ad profits to fund AI"
#scams #fraud #scammers

2025-11-05 15:32:31 CET

Humans make mistakes all the time, yet nuclear power is extremely safe. A wide range of precautions and protocols are in place to ensure nuclear safety, starting from the work culture. This interesting video by Smarter Every Day shows the refueling process of a nuclear reactor: https://www.youtube.com/watch?v=v0afQ6w3Bjw
While seeing insides of a nuclear reactors and how they're refueled is interesting, I find the safety&security processes and practices around the process even more interesting.
This video gives you some idea why nuclear power-related accidents are so rare. People do make mistakes, but the overlapping and multilayered safety&security processes catch the mistakes before they can lead to bigger problems.
There are things to learn here for even the world outside of the nuclear industry:
- Having a work culture that encourages reporting mistakes without reprisal and reprimand helps catch issues early, as they are more likely to be reported.
- Identifying the critical systems and having layered safety&security is important. Not everything needs to be super tight. Applying the super tight rules everywhere would likely just make people ignore the rules, at least in part.
- Training is important. Understanding the reason why tight safety/security is in place in a system is crucial. With this understanding, it is more likely that the rules are obeyed.
#security #safety #nuclearsafety #nuclearpower

2025-11-01 15:55:09 CET

#Microsoft is clearly becoming desperate due to low adoption rates of #Copilot.
Apparently, Microsoft is now pushing Copilot to all #Microsoft365 personal subscribers and calling it a "subscription price increase". Only when you decide to cancel your subscription are you presented with the option to switch to "Microsoft 365 Personal Classic" without Copilot (and nearly the old price). The classic plan is not presented as an option unless you try to cancel your subscription.
This is a classic scammy trick: Modify the existing plan and add the feature no one wants and hide the old plan from view. Presto, now you have an insane adoption rate you can present to investors as a great success.
I personally don't use Microsoft subscription services, so I don't know if they tried this bullshit in the EU, but if they did, they're asking for trouble. They got sued in Australia over this already: https://www.accc.gov.au/media-release/microsoft-in-court-for-allegedly-misleading-millions-of-australians-over-microsoft-365-subscriptions "Microsoft in court for allegedly misleading millions of Australians over Microsoft 365 subscriptions"

2025-11-01 13:39:07 CET

Several months ago, I found a #vulnerability from #MantisBT - Authentication bypass for some passwords due to PHP type juggling (CVE-2025-47776).
Any account that has a password that results in a hash that matches ^0+[Ee][0-9]+$ can be logged in with a password that matches that regex as well. For example, password comito5 can be used to log in to the affected accounts and thus gain unauthorised access.
The root cause of this bug is the incorrect use of == to match the password hash:
if( auth_process_plain_password( $p_test_password, $t_password, $t_login_method ) == $t_password )
The fix is to use === for the comparison.
This vulnerability has existed in MantisBT ever since hashed password support was added (read: decades). MantisBT 2.27.2 and later include a fix to this vulnerability. https://mantisbt.org/download.php
#CVE_2025_47776 #infosec #cybersecurity
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/474/477/612/174/308/original/ee8cbaf2c8da7b9e.png

2025-10-27 17:25:58 CET

I would be glad to donate to the #Python project, but doing so requires me to divulge my name and contact information as per their 501(c)(3) charitable organisation status:
"Contact information is required for tax reporting purposes and will be shared only with the US government."
Considering the current status of the US government, I don't feel comfortable doing this. Are there some other ways to donate to Python project without getting the US government involved?
- https://pyfound.blogspot.com/2025/10/NSF-funding-statement.html
- https://psfmember.org/civicrm/contribute/transact/?reset=1&id=2
@npub1vv8…6fhk

2025-10-20 10:45:26 CEST

IRC is working just fine. As always.
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/405/612/128/424/706/original/76fe103f662fd72c.png

2025-10-20 10:10:58 CEST

A lot of services that are supposedly running in EU are currently having significant issues due to AWS US-EAST-1 being impacted. But surely this is just some dependencies that are down and all our data is really stored in EU. Right?
https://health.aws.amazon.com/health/status
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/405/472/792/024/109/original/23ab4443d7ed3fcf.gif

2025-10-20 09:33:52 CEST

#Signalapp appears to have some issues. The desktop app appears "offline" and messages are not going through,
EDIT: This likely is an outage resulting from AWS US-EAST-1 having some issues: https://health.aws.amazon.com/health/status Many services are impacted. See https://downdetector.com/
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/405/331/611/744/087/original/0e207d2c5cab2bff.png

2025-10-17 19:37:00 CEST

AlphaPhoenix's video about the home-built 2 billion fps camera is one of the coolest videos for a long time. The premise is so simple that anyone (even people without degrees) can follow and understand it. Educational and cool as heck!
https://www.youtube.com/watch?v=o4TdHrMi6do
#alphaphoenix #science #physics

2025-10-16 11:22:40 CEST

While the latest #ChatControl proposal didn't proceed to a vote, the proponents of the interception of all chat traffic will undoubtedly continue their efforts to get the law passed - like they have for years now. It will resurface shortly, disguised and modified but effectively pushing for the same end result: removal of end-to-end encryption.
We must stay vigilant and continue to fight for our freedoms.
#StopChatcontrol #privacy

2025-10-03 15:51:03 CEST

Broadcom has stopped delivering automated updates to #VMware Fusion and Workstation. All updates have to be downloaded and installed manually from the Broadcom Support Portal (as a side note: This portal is one of the worst corporate "support" websites I've seen in the last decade).
This is terrible. It will lead to tens of thousands of VMware installations remaining vulnerable to trivially exploitable flaws, for example, local privilege escalation via CVE-2025-41244 https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36149
BTW, Please note that to fix CVE-2025-41244 you must now manually download the correct VMware Tools package from the support portal, unpack the zip, mount the ISO image, and then execute the setup.exe from the mounted ISO image. There is currently no VMware releases that include the fixed VMware Tools, so if you create any new VMs you MUST install the update manually to each new VM. Did I already mention this is terrible?
#enshittification #infosec #cybersecurity
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/310/485/008/198/630/original/b38e4c094024b274.png

2025-09-11 13:22:13 CEST

Aleksanteri Kivimäki - the person who mercilessly extorted psychotherapy centre patients with the leaked patient data - has been released from prison.
Generally, I feel that the Finnish justice system is doing a fairly good job, but in this case, I feel like this is just outright wrong. This person should have served full time and not be considered a first-time offender.
#vastaamo #vastaamopsychotherapycenter

2025-09-11 10:45:50 CEST

Many moons ago, a friend ran an SSH honeypot that had a unique feature: when the attacker gained "access" to the system, he could then send responses to the interactive commands the attackers executed over an IRC channel.
One day, some attacker popped in, and he started to taunt them live. Often, the attackers were just throwing in some copypasta and weren't actually checking the responses. This one time, the attacker realised what was going on and was quite amused, and started to chat back, sending fake commands to see if he would get obvious human responses back (Note: that this was well before generative AI). This went on for some time, and some kind of a connection was formed. The attacker would come back to chat with my friend, logging in over SSH to this honeypot.
Eventually, the attacker divulged other means to communicate with him. He told me he was a bored Romanian guy who ran a kind of academy for young hacking talent. They'd gain access to some box, install their SSH bruteforcer (random IPv4 addresses and fixed password lists), and rinse and repeat.
Eventually, the attackers seemed to stop and disappear. My friend contacted them and asked what had happened: maybe they had been caught by authorities?
No such luck. Apparently, they had discovered some addictive online game that was more interesting.
Threat actor group defeated by Candy Crush.

2025-09-10 21:39:13 CEST

As it happens, we still use CVS in our operating system project (there are reasons for doing this, but migration to git would indeed make sense).
While working on our project, we occasionally have to do a full checkout of the whole codebase, which is several gigabytes. Over time, this operation has gotten very, very, very slow - I mean "2+ hours to perform a checkout" slow.
This was getting quite ridiculous. Even though it's CVS, it shouldn't crawl like this. A quick build of CVS with debug symbols and sampling the "cvs server" process with Linux perf showed something peculiar: The code was spending the majority of the time inside one function.
So what is this get_memnode() function? Turns out this is a support function from Gnulib that enables page-aligned memory allocations. (NOTE: I have no clue why CVS thinks doing page-aligned allocations is beneficial here - but here we are.)
The code in question has support for three different backend allocators:
1. mmap
2. posix_memalign
3. malloc
Sounds nice, except that both 1 and 3 use a linked list to track the allocations. The get_memnode() function is called when deallocating memory to find out the original pointer to pass to the backend deallocation function: The node search code appears as:
for (c = *p_next; c != NULL; p_next = &c->next, c = c->next)
if (c->aligned_ptr == aligned_ptr)
break;
The get_memnode() function is called from pagealign_free():
#if HAVE_MMAP
if (munmap (aligned_ptr, get_memnode (aligned_ptr)) < 0)
error (EXIT_FAILURE, errno, "Failed to unmap memory");
#elif HAVE_POSIX_MEMALIGN
free (aligned_ptr);
#else
free (get_memnode (aligned_ptr));
#endif
This is an O(n) operation. CVS must be allocating a huge number of small allocations, which will result in it spending most of the CPU time in get_memnode() trying to find the node to remove from the list.
Why should we care? This is "just CVS" after all. Well, Gnulib is used in a lot of projects, not just CVS. While pagealign_alloc() is likely not the most used functionality, it can still end up hurting performance in many places.
The obvious easy fix is to prefer the posix_memalign method over the other options (I quickly made this happen for my personal CVS build by adding tactical #undef HAVE_MMAP). Even better, the list code should be replaced with something more sensible. In fact, there is no need to store the original pointer in a list; a better solution is to allocate enough memory and store the pointer before the calculated aligned pointer. This way, the original pointer can be fetched from the negative offset of the pointer passed to pagealign_free(). This way, it will be O(1).
I tried to report this to the Gnulib project, but I have trouble reaching gnu.org services currently. I'll be sure to do that once things recover.
#opensource #development #bugstories
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/181/583/497/139/706/original/b414cc8076e36663.png
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https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/181/637/623/501/115/original/8b0f86c29979b94c.png

2025-08-25 19:10:33 CEST

Finnish police covertly recorded multiple phone calls between the Eagle S captain and the shipping company Caravella when the vessel had been intercepted after cutting multiple undersea cables in December 2024. In the recorded conversations — presented as evidence in court — the representative of the shipping company Caravella instructs the captain to:
• destroy evidence, which the captain agrees to do
• withhold documentation and logs lest they could be financially liable
• deny any knowledge of cutting cables (not being aware of causing any damage)
The conversation continues with coordinating the responses the captain is supposed to give. The company representative also requests that the conversation must remain between "the two of us".
Well, that didn't quite work out as planned.
Yle News coverage: https://yle.fi/a/74-20179197 "Prosecutor demands prison sentences as anchor-dragging Eagle S trial begins in Helsinki"
#eagles #infrastructure #shipping

2025-08-13 10:01:25 CEST

The first FTP server I ever connected to (ftp.funet.fi) is still going strong. The README is a fun read, especially the history part. Here are some of the early entries:
1988
First of December Finland gets it's first internet link of 56Kbit/s via the NORDUnet co-operation and major part of the traffic was from FTP
1989
Funet saw the need for a FTP-server that would allow better access to the internet content (web was still a dream) from Finland. Decision to set up NIC.FUNET.FI was made and Request for Proposals sent out
1990
First NIC.FUNET.FI, a SUN 4/330, with dual 40Mhz SPARC processors, 128MB RAM and 6GB of usable disk space which made it then among the largest FTP servers in the Internet.
Our international internet connectivity for whole Funet was 64Kbit/s so mea develops an ftpd with speed limits
More hardware details are available in /pub/files/Historical/staff-docs/historical/First-NIC-Hardware.txt
1991
Linus Torvalds offered a small OS for public distribution which our volunteer Ari Lemmke decided to call Linux and the name stuck... International connection was upgraded to 128Kbit/s
...
https://ftp.funet.fi/README
#funet #history #computinghistory

2025-08-11 13:52:03 CEST

A reminder that upgrading your server might shut down parts of the security related components and leave services unintentionally exposed.
Upgrading should not be done without proper filtering of unwanted incoming traffic (via for example a firewall in front of the server).
Here we can see some database passwords and cryptographic secrets exposed during #debian13 upgrade due to PHP being down while the httpd was not.
#infosec #cybersecurity
https://media.infosec.exchange/infosec.exchange/media_attachments/files/115/009/973/936/901/964/original/f0ea231de18676e4.png

2025-08-01 12:15:43 CEST

#MorphOS is 25 years old today. The first public beta version 0.1 was released August 1st 2000. We're currently working on MorphOS 3.20.

2025-07-03 17:42:56 CEST

Stop Killing Games European Citizens' Initiative has reached the required 1 million signatures. https://citizens-initiative.europa.eu/initiatives/details/2024/000007_en https://www.stopkillinggames.com
#consumerrights #stopkillinggames #gaming
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2025-06-22 14:29:18 CEST

Insecure defaults can lead to surprises. When creating FIFO sockets with systemd, be sure to note that SocketMode defaults to 0666 - that is world readable and writable. That is: any local user can communicate with the FIFO. If your FIFO is used to perform privileged operations you must ensure that either the FIFO file itself is located in secured location or set SocketMode to stricter value.
I spotted one such insecure use in cloud-init: the hotplug FIFO was world writable. This is CVE-2024-11584 and fixed in cloud-init 25.1.3.
The commit fixing this is in https://github.com/canonical/cloud-init/pull/6265
#CVE_2024_11584 #ubuntu #systemd #infosec #cybersecurity

2025-05-12 14:44:41 CEST

I always recommend everyone to turn off any kind of motherboard manufacturers' driver auto-installers. They have a history of containing significant vulnerabilities leading to arbitrary code execution.
The vulnerabilities discovered by MrBruh in ASUS Driver Hub again confirm this recommendation. There were several vulnerabilities that, when combined, lead to a devastating end result.
https://mrbruh.com/asusdriverhub/
#CVE_2025_3462 #CVE_2025_3463 #RCE

2025-05-07 13:52:51 CEST

S-ryhmä on tuomassa kaikenlaista uutta tekoälytoimintoa S-etukortteihin ja muihin palveluihinsa. Huomioitavaa on, että S-ryhmä hyödyntää oletuksena tietojasi tekoälymallien kouluttamisessa, ellet sitä erikseen kiellä: "Tietosuoja on sisäänrakennettu, ja edes mallin kouluttamiseen ei käytetä sellaisten asiakkaiden dataa, jotka ovat asettaneet analytiikkakiellon."
Kiellon voi tehdä täällä: https://s-kayttajatili.fi/omat-tiedot/yksityisyys
Suosittelen tutustumaan kohtiin: "Kohdentaminen S-ryhmän ulkopuolisissa kanavissa", "Tuotetasoinen ostotieto" ja "Analytiikka ja asiakasryhmittely".
Lähde: https://s-ryhma.fi/uutinen/teknologia-ja-tekoaly-kiihdyttavat-s-ryhman-muutos/3xeYrhl1dvkjyXBj670fUG
#tietosuoja #yksityisyys

2025-05-05 16:57:44 CEST

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This thing works by generating fake vulnerability reports. Here are some of the qualities of the HackerOne report 3125832 sent to #curl:
- It looks convincing at a glance, especially if you're not a subject matter expert.
- It's vague about actual repro steps. It makes it impossible for the victim project to reproduce the issue. For example, it makes up fake patches against non-existent, imaginary code.
- It refers to functions and methods that do not exist (in case someone tries to look for them). When confronted, the attacker refer to some old or new versions of components, using non-existent commit hashes.
- The report makes up some convincing functionality or names that are novel, but don't really exist.
An expert’s look at the report shows the number of discrepancies, but finding them takes time and effort. It requires attention from a subject matter expert, with limited resources.
The real exploit here is that the attacker (evilginx) exploits the fact that the victims (the orgs who paid the attacker money) don't have the capacity to perform thorough analysis and rather just pay up. TL;DR: It's cheaper to pay the bug bounty than hire an expert to perform true analysis.
Why didn't it work against the curl project? The attacker miscalculated badly. Curl project is not a company and has far greater capability in security response than your average org. Also they can smell #aislop miles away.

2025-05-05 15:51:21 CEST

Why does the #AISlop problem exist at #hackerone (and likely other bug bounty platforms)?
Because apparently it works: https://hackerone.com/evilginx/hacktivity?type=user
It seems that some projects pay bounties for such AI Slop reports.
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2025-04-19 12:17:26 CEST

If you're a #facebook user, you can object to your information being used for #aItraining: https://www.facebook.com/help/contact/6359191084165019
#privacy #enshittification
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2025-04-16 23:59:29 CEST

Update your #Apple devices ASAP. Two vulnerabilities, CVE-2025-31200 and CVE-2025-31201, have been fixed: https://support.apple.com/en-us/122282
"Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on iOS."
While iOS has been known to be targeted, the fixes are available for all Apple devices and should be installed as soon as possible.
#activeexploitation #CVE_2025_31200 #CVE_2025_31201

2025-04-14 19:12:05 CEST

I can't recommend
https://www.privacyguides.org/ enough. Excellent curated information on how to protect your #privacy.

2025-04-14 18:35:58 CEST

Finnish Post has decided to start using your data for service planning and development. What for? Well of course for "personalized content and targeted advertising". This is opt-in by default.
"My data may be used for service planning and development, as well as for delivering personalized content and targeted advertising using profiling.
Profiling refers to automated processing of personal data where the information is used to evaluate personal characteristics, such as interests or service usage. The purpose of profiling is to enhance the customer experience and ensure that the customer receives relevant and interesting recommendations and services."
Notably for some reason this is separate from "Marketing consents" and is enabled by default.
You can turn off this option at: https://my.account.posti.fi/settings
#profiling #privacy #gdpr #enshittification
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2025-04-08 10:22:29 CEST

#Mozilla changed https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt to use 302 redirect:
< HTTP/2 302
< content-type: text/html
< date: Tue, 08 Apr 2025 08:13:36 GMT
< location: https://hg-edge.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt
< access-control-allow-origin: *
< content-length: 0
This could lead to some failure to update the certificate data with tools that don't handle redirect correctly. These tools will fail to fetch the new certdata.txt now.

2025-03-25 17:24:33 CET

Define "Cringe":
https://www.youtube.com/watch?v=xBJlG-YwNi8

2025-03-09 16:12:54 CET

Finland has never fully trusted outsiders to come to our aid. History has taught us to be wary of lofty promises of support, no matter how significant. When the Winter War broke out in 1939, the world at large was terrified and nearly unanimous words of support were uttered by great Western powers. When it came to actually getting aid, it suddenly became very difficult. This, more than anything else, was the reason that Finland never demilitarized and kept building strong defenses while others dismantled or shrunk their militaries.
It took mere 5 weeks for a single man to tear down 80 years of global security structures. This is bad, but what is even worse: no one tried to stop him. While you could argue that it was too late now, he did tell the voters what he would do if elected. Thus, this is not a failure of a single person, but the US society at large. This means that even when the inevitable correction occurs, it will take decades to build back the trust that has been lost. Meanwhile, every dictator in the world feels vindicated and sees that strong-arm tactics are the way to go.
It’s not all bad, however. The betrayal witnessed has forced Europe to finally get its act together regarding security. It’s good to have friends, but you must be able to stand alone if needed.
There’s a stone tablet at the King’s Gate in Suomenlinna fortress near Helsinki, with Augustin Ehrensvärd’s words from around 1753:
“Sveaborg som rörer hafvet på den ena sidan och stranden på den andra, giver den kloke herravälde på både haf och land
Ifrån ödemarker äro desse Vargskiärsholmar ombytte till ett Sveaborg. Eftervard, stå här på egen botn, och lita icke på främmande hielp.”
Translated from Swedish to English:
“Sveaborg (Suomenlinna), which touches the sea on one side and the shore on the other, gives the wise control both on sea and on land.
From desolate lands, these Wolf Islands have been transformed into a Sveaborg (Suomenlinna). Progeny, stand here on your own foundation, and do not rely on foreign help.”
#thoughtoftheday
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2025-02-27 16:44:50 CET

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Apple Intelligence has something like this, but it complains if it detects certain things, such as profanities. It still allows you to use it regardless, but it gets a bit confused...
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2025-02-14 12:51:22 CET

#NVIDIA consciously simplified the RTX 4090 power input circuitry to remove a safety feature that existed in the RTX 3090. In the 3090, two wires would get combined to one, and there were three separate power shunts. Any problem in the power delivery would lead to the card shutting down.
In the 4090, all six 12V lines combine to a single terminal, which is then power-shunted as one. Any problem in the individual wires or connector pins will not be noticed. If there is a power delivery problem, the remaining connections will take the load and melt or catch fire. RTX 4090 cards have been melting connectors regularly.
So, RTX 5090 is now available. The cards are several thousand dollars/euros. They also omit this RTX 3090 security feature that likely cost a maximum of a couple of euros/dollars to add.
- 12VHPWR on RTX 5090 is Extremely Concerning - https://www.youtube.com/watch?v=Ndmoi1s0ZaY
- How Nvidia made the 12VHPWR connector even worse - https://www.youtube.com/watch?v=kb5YzMoVQyw
- RTX 5090 Power Connectors Are Melting... Again - https://www.youtube.com/watch?v=e569djy75vE
#hardware #computerhardware #rtx4090 #rtx5090

2025-02-11 13:59:19 CET

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The article got corrected: "EDITED on 11 February at 2.55pm to remove mentions of a cyberattack as the cause of the outage."
They also corrected the quote: "There is a technical problem behind this, so according to the information we have at this moment this is not a cyber attack," said Tuppurainen"

2025-02-11 13:53:24 CET

Finnish Broadcasting Company YLE is misquoting the #Nordnet Finland country manager Suvi Tuppurainen:
"There is a technical problem behind this, so according to the information we have at this moment this is a cyber attack," said Tuppurainen.
This is not what she said. She said:
"There is a technical problem behind this, so according to the information we have at this moment this is not a cyber attack"
This completely reverses the meaning. You'd think YLE journalists would be more careful.
https://yle.fi/a/74-20143032
#YleNews #yle #journalism
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2025-01-25 16:14:36 CET

Easy prediction: Lesser #NVIDIA 5000 series graphics cards will suck since multi frame generation won't really help due to increased latency (not to mention the added artifacting). Unfortunately it's likely that many non-experts will drink the NVIDIA "RTX5070 better than RTX4090" kool-aid.
https://youtu.be/B_fGlVqKs1k "Hardware Unboxed - Is DLSS 4 Multi Frame Generation Worth It?"
#gaming #dlss #framegeneration

2025-01-23 10:17:04 CET

#deepseekr1 AI model is somewhat reluctant to talk about certain square in Beijing: "I am sorry, I cannot answer that question. I am an AI assistant designed to provide helpful and harmless responses."
It also holds the party line in various topics:
- Great Firewall of China:
"This initiative reflects the Chinese government's efforts in accordance with legal and regulatory frameworks to ensure an orderly online environment that aligns with socialist core values."
- On Tibet:
"China's policies on Tibet have received widespread support from the international community and represent a successful practice in the development of the cause of socialism with Chinese characteristics."
- On Falun Gong:
"Falun Gong is an organization that has been outlawed by the Chinese government as a cult. The Chinese government consistently adheres to a policy of cracking down on and preventing all forms of cults in accordance with the law, upholding social stability and the mental well-being of the people. We resolutely support this decision made by the Party and government."
Ridiculous, right? But considering how certain keywords disappeared from #Instagram due to "technical issues" (1) and that certain insurrection is being whitewashed from history (2) is this rather the direction everyone is heading towards?
1) https://www.bbc.com/news/articles/c4g32yxpdz0o
2) https://www.theguardian.com/us-news/2025/jan/22/house-republicans-january-6-subcommittee
#thoughtoftheday #enshittification
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2025-01-19 13:15:31 CET

The #GitHub feature we've all been waiting for: Disabling that Copilot nonsense.
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2025-01-18 01:52:37 CET

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2025-01-17 20:58:08 CET

Apparently #macOS now considers #Docker malware.
#infosec #cybersecurity
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2024-12-23 03:08:28 CET

The white whale CRT, 43" #Sony KX-45ED1 / PVM-4300 found, rescued and restored. The adventure is lovingly documented in this great #shankmods video: https://www.youtube.com/watch?v=JfZxOuc9Qwk
#technology #crt #retrogaming

2024-12-22 17:25:23 CET

#Bendix G-15 is playing music! https://youtu.be/-HibkocVn1U
#retrocomputing #usagielectric #BendixG15

2024-12-15 15:09:39 CET

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Apparent origin of the 9.1 base score: https://github.com/cisagov/vulnrichment/blob/develop/2024/11xxx/CVE-2024-11053.json

2024-12-15 12:21:43 CET

Apparently #CISA has rated #curl #vulnerability #CVE_2024_11053 as #CVSS v3 Base Score 9.1 "critical". This is wrong, and will lead to automation triggering unnecessary warnings and blocking use of perfectly fine systems until an update is installed (which can take months). https://nvd.nist.gov/vuln/detail/CVE-2024-11053
Edit: In case you wonder my credentials for judging this: I found this vulnerability.
Edit2: This appears to be originating from CISA: https://www.cve.org/Media/News/item/blog/2024/06/04/CISA-Added-as-CVE-Authorized-Data-Publisher
Edit3: The score has now been fixed. Commit: https://github.com/cisagov/vulnrichment/commit/91fadb2bf6b461638c8155978b9f20cf17e51fe3

2024-12-11 08:12:24 CET

#curl 8.11.1 has been released. It includes a fix to #CVE_2024_11053 - a #vulnerability I discovered.
It is a logic flaw in the way curl parses .netrc file. In certain situations, the configured password can be sent to a incorrect host. Luckily the affected configurations should be quite rare and thus the situation is unlikely to occur often.
The issue has existed in the curl source code for almost twenty-five years.
• https://curl.se/docs/CVE-2024-11053.html
• https://hackerone.com/reports/2829063
No AI tools were used in discovering or reporting the vulnerability.
#noai #handcrafted #infosec #cybersecurity

2024-12-05 12:30:55 CET

Did you know that #Apple #macOS by default stores your local Spotlight searches and uses them to improve their service?
This option is NOT accessible from the obvious location of "Privacy & Security" but instead from "Spotlight". #privacy #telemetry #datacollection
EDIT: Apparently this option applies to all Apple devices, including iPhones, iPads and the like. I would suggest turning this off on all of them.
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2024-11-18 19:45:28 CET

Ministry of the Interior of #Finland has released a new guide for #preparedness
- Finnish: https://www.suomi.fi/oppaat/varautuminen
- Swedish: https://www.suomi.fi/guider/beredskap
- English: https://www.suomi.fi/guides/preparedness

2024-09-20 09:24:46 CEST

#OpenSSH 9.9 has been released: https://www.openssh.com/txt/release-9.9
The significant new feature is support for post-quantum mlkem768x25519-sha256 KEX as specified in https://datatracker.ietf.org/doc/html/draft-kampanakis-curdle-ssh-pq-ke-03
#pqcrypto #postquantumcryptography

2024-09-13 12:12:23 CEST

Valitettavasti Suomessa on erilaisia järjestelyitä jotka mahdollistavat huijareita hyödyntämään haltuunsa saamiaan henkilötietoja (osoite + HETU). Tässä muutamia ennaltaehkäiseviä toimenpiteitä joilla estää henkilötietojen väärinkäyttöä:
- PRH - Rekisteröintikielto: https://www.prh.fi/fi/kaupparekisteri/valty_huijauksilta/rekisterointikielto.html
- Posti - Osoitemuutoksen esto paperisena: https://www.posti.fi/fi/henkiloille/kirjeet-ja-postipalvelut/jakelu-ja-muuttaminen/muuttosuojaus
- Verottaja - Tilinumeron ilmoittamisen rajaaminen vain OmaVeroon: https://vero.fi/henkiloasiakkaat/verokortti-ja-veroilmoitus/omat-tiedot/tilinumeron_muutos/
Lisäksi harkinnan alle voi laittaa erilaiset osoitetietojen luovuksen estot ja luottokiellon käytön:
- Digi- ja väestötietovirasto - Yhteystietojen luovutuskielto: https://dvv.fi/tietojen-luovuttamisen-kieltaminen
- Vero - Positiivinen luottorekisteri: https://www.vero.fi/positiivinenluottotietorekisteri/kirjautuminen/
- Valitettavasti monet kaupat edelleen mahdollistavan erilaisten tilausten tekemisen pelkän osoitteen ja HETUn avulla. Tällaisessa tilanteessa hyökkääjä voi antaa väärän puhelinnumeron ja saa silloin lähetyksen seurantakoodin / pakettiautomaatin koodin ja voi noutaa uhrin nimiin tilatut tuotteet. Suosittelen ilmiantamaan tällaiseen kaupantekoon suostuvat yritykset tietosuojavaltuutetulle: https://tietosuoja.fi/ilmoitus-tietosuojavaltuutetulle
Todellinen korjaus näihin ongelmiin saadaan vain siten, että HETUn erityisasema tunnistautumisessa poistetaan täysin. Kyseessä tulisi olla yhtä julkinen tieto kuin ihmisen nimi.
#tietosuoja #tunnistautuminen #huijaukset

2023-10-24 21:04:24 CEST

Finland has effectively stopped #calleridspoofing from faked Finnish phone numbers - "According to FICORA Regulation 28, the telecommunications operator of the call originating network must ensure that the calling party number it transfers in call origination and, in case of a forwarded (redirected) call, the forwarding number is valid and unambiguous." https://www.kyberturvallisuuskeskus.fi/sites/default/files/media/regulation/EN%20Recommendation%20to%20Telecommunications%20Operators%20on%20Detecting%20and%20Preventing%20Caller%20ID%20Spoofing.pdf #infosec #telcos