Xe Iaso

https://xeiaso.net/blog

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Tech 92% · Gaming 4% · Life 4%

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  1. You should probably check on your smart appliances

    The scraping problem is worse than anyone can imagine and thanks to my friends at Sourceware we have some real data to prove it. I've been working more on Anubis' reputation database and I've run into a really weird discovery: 80-90% of the hits created by the honeypot feature are from IP addresses that do not belong to any existing threat monitoring lists. Here's a breakdown of the honeypot hits Sourceware has gotten in the last few months: Assessment of…

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  2. Presigned URLs are technically a security vuln

    A presigned URL is a replay attack you did on purpose. Replayable auth tokens are the textbook way to create vulnerable systems, but Tigris ships them as a first-class feature with presigned URLs and so does every other object storage system on the planet. However this isn't an oversight because presigned URLs turn a weakness into a feature. Replay attacks are a real problem and the classic fix is miserable When you authenticate a request with Amazon's SigV4 protocol for Tigris, your client…

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  3. The console wars have been lost

    Previously I opined that Valve was about to win the console generation. I couldn't have possibly predicted that both Microsoft and Sony would just self-sabotage so hard that they're both going to lose. Between Microsoft's decimation of the Xbox division, slaughtering off the IdTech team, and continued increases of Xbox hardware prices; there's nothing to really be excited about with the Xbox. Sure their most recent presentation showed off a bunch of exclusives, but none of them really made me…

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  4. Agents are monads (but not that kind)

    An AI agent is its state. Strip away that state and you don’t have a lesser version of your agent; you have only the base model it was running on. This hyle of your weights is much different from the pneuma of your agent. Okay, from a functional programming / category theory perspective, saying “an agent is a monad” is a category error. Category theory monads are type constructors for computations that satisfy the monad laws that let you raise a value into a monadic computation and…

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  5. "No way to prevent this" say users of only language where this regularly happens

    In the hours following the release of CVE-2026-8461 for the project FFmpeg, site reliability workers and systems administrators scrambled to desperately rebuild and patch all their systems to fix an out-of-bounds write in the MagicYUV decoder (libavcodec/magicyuv.c) caused by improper bounds checking, resulting in heap corruption, denial of service, and potential remote code execution when processing a specially crafted video file. This is due to the affected components being written in C, the…

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  6. "No way to prevent this" say users of only language where this regularly happens

    In the hours following the release of CVE-2026-55200 for the project libssh2, site reliability workers and systems administrators scrambled to desperately rebuild and patch all their systems to fix an out-of-bounds write in ssh2_transport_read() due to a missing upper bound check on the packet_length field, resulting in heap corruption and potential remote code execution. This is due to the affected components being written in C, the only programming language where these vulnerabilities…

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  7. I taught a bucket to speak git

    What happens if I just point a git server at an object storage bucket? Back when I was porting agent sandboxes to Go, I built everything on top of billy, a filesystem abstraction for Go. The whole trick of the project was teaching a Tigris bucket to act enough like a filesystem that a shell interpreter and its tools couldn’t tell the difference. Billy was the key layer that made the entire façade fall into place. After I had gotten things working, I learned that I’m using billy way outside its…

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  8. I hate compilers

    Anubis is about to get WebAssembly-based proof of work checks so that administrators can use a non-SHA256 proof of work method to protect their websites. Part of the implementation goals of this work is that the check logic is defined in one place on both client and server. The client and server will then hook into the WebAssembly in order to make sure they're running in lockstep. However, one small problem comes up. What do you do when the client has WebAssembly disabled? I really don't want…

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  9. Why are cached input tokens cheaper with AI services?

    When you see AI model pricing pages, you usually see things broken down like this: ModelContext LengthMax CoT TokensMax Output TokensInput Price (Cache Hit)Input Price (Cache Miss)Output Pricedeepseek-chat64K-8K$0.07 / 1M tokens$0.27 / 1M tokens$1.10 / 1M tokensdeepseek-reasoner64K32K8K$0.14 / 1M tokens$0.55 / 1M tokens$2.19 / 1M tokens Source: DeepSeek API Docs If you manage to have most of your input tokens be cached, you save a huge amount, in this case $0.20 per million tokens. What does…

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  10. "No way to prevent this" say users of only language where this regularly happens

    In the hours following the release of CVE-2026-45447 for the project OpenSSL, site reliability workers and systems administrators scrambled to desperately rebuild and patch all their systems to fix a heap use-after-free in PKCS7_verify(). This is due to the affected components being written in C, the only programming language where these vulnerabilities regularly happen. "This was a terrible tragedy, but sometimes these things just happen and there's nothing anyone can do to stop them," said…

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  11. Giving your Go apps Tigris superpowers

    Tigris is S3-compatible, which means you can point the AWS SDK at it and most things just work. The catch is that the Tigris-exclusive features—bucket forking, snapshots, object renaming, and the like—need verbose workarounds because the AWS SDK doesn't know they exist. So we wrote a Go SDK that does. It comes in two flavors: the storage package is a drop-in replacement for the standard S3 client with first-class methods for the Tigris-specific operations, and simplestorage is a higher-level…

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  12. IPv6 zones in URLs are a mistake

    IPv6 is weird. One of the more strange parts of the standard is that every interface's link local addresses are in fe80::whatever. If you have a machine with two network interfaces, both of them will be in fe80::, so if you have a packet destined to fe80::4, how do you disambiguate it? The answer is you use IPv6 scopes/zones. The exact format of what goes into a zone is OS dependent, but on Linux it's the interface name and on Windows it's the interface ID. This lets the kernel's routing table…

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  13. "No way to prevent this" say users of only package manager where this regularly happens

    In the hours following the news that Redhat Insights' JavaScript packages fell victim to a supply chain attack via NPM, developers and systems administrators scrambled ensure all of their projects were unaffected from a supply chain attack that steals credentials for AWS, GCP, Azure, Kubernetes, HashiCorp Vault, npm, and CircleCI before then self-propagating via said stolen npm credentials and the bypass_2fa setting. This establishes persistence via Claude Code hooks and VS Code task injection.…

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  14. Dancing mad with sandboxing

    CadeyWhat is an operating system, really?AoiI mean, isn't it obvious? It's something like FreeBSD or Fedora that has a kernel, userspace, graphics stack, core set of programs, and everything else you need to be able to use a computer. Is this a trick question?NumaWell it depends, is the Nintendo Switch OS an operating system? It doesn't have a shell in the same way FreeBSD does. Is SEL4 an OS? It doesn't ship with core utilities. Is Linux an OS? Is Windows an OS?AoiOh gods here we go again…

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  15. "No way to prevent this" say users of only package manager where this regularly happens

    In the hours following the news that art-template fell victim to a supply chain attack via NPM, developers and systems administrators scrambled ensure all of their projects were unaffected from a supply chain attack where attackers have controlled the repository since 2025 and are using it to load unauthorized JavaScript from third party domains, including but not limited to Baidu Analytics. This is is due to the affected dependencies being distributed via NPM, the only package manager where…

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  16. "No way to prevent this" say users of only language where this regularly happens

    In the hours following the release of CVE-2026-45250 for the project FreeBSD, site reliability workers and systems administrators scrambled to desperately rebuild and patch all their systems to fix a kernel stack overflow when validating permissions of the setcred(2) system call, allowing arbitrary code execution in the context of the kernel. This is due to the affected components being written in C, the only programming language where these vulnerabilities regularly happen. "This was a…

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  17. "No way to prevent this" say users of only language where this regularly happens

    In the hours following the release of CVE-2026-45584 for the project Microsoft Windows, site reliability workers and systems administrators scrambled to desperately rebuild and patch all their systems to fix a memory safety vulnerability resulting in arbitrary code execution inside the virus scanner Windows Defender. This is due to the affected components being written in C++, the only programming language where these vulnerabilities regularly happen. "This was a terrible tragedy, but sometimes…

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  18. Amazonbot is finally respecting robots.txt

    I just got an email from Amazon saying they're finally going to respect robots.txt. Here's the verbatim email I got: We are writing to inform you that starting Monday, June 15, 2026, crawl preferences for Amazonbot will be managed solely through the industry-standard directives. This gives you direct, ongoing control over how Amazonbot accesses your site, rather than relying on manual requests. If you do not implement robots.txt directives by that date, Amazonbot will follow standard web…

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  19. I'm really frustrated that GitLab is doing layoffs

    GitLab announced layoffs today. They don't state how many people are affected, but honestly I find this really frustrating for several reasons: This is the one time where they could have won by doing relatively nothing. GitHub is having big outages on a daily cadence. All they have to do is market themselves as "we're the stable one" and maybe add tooling to run your existing GitHub Actions in GitLab to make the transition easier. They could have won so hard it's not even funny because GitLab…

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  20. Slowly going mad with power using Tekton

    I'm not feeling good about the future of GitHub https://red-squares.cian.lol/ I have a bunch of repos I'd like to migrate off of GitHub One small problem: all my CI flows assume I'm using GitHub Actions I mean this is reasonable, I've used GitHub Actions for most of my career All my GitHub Actions flows only really work on GitHub I've moved some of them off of GitHub in the past, but it requires some significant modification and hacking because my actions really rely on GitHub platform features…

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  21. Maybe you shouldn't install new software for a bit

    In the wake of copy.fail, there are more vulnerabilities that have been announced: Copy Fail 2: Electric Boogaloo Dirty Frag Right now would be one of the best times for a supply chain attack via NPM to hit hard. Outside of Linux kernel patches from your distro, I think it's probably a good idea to put a moratorium on installing new software for a week or so.

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  22. Claude Code won April Fools Day this year

    They gave people a heckin tamagochi, what's not to like?

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  23. Small note about AI 'GPUs'

    They are graphical processing units that can't process graphics.

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  24. Homelab downtime update: The fight for DNS supremacy

    Turns out everything DID NOT go offline somehow. Yay!

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