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Culture War Roundup for the week of April 1, 2024

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Visible-source seems to have helped track down the whole story, as did the development discussions that happened in public (though what about e-mail/discord?), but the initial discovery seems like it was entirely separate from any source-diving, and a lot of the attack never had its source available until people began decompiling it.

There isn't any evidence directly supporting this, but I saw a claim that this entire claim of discovery ("slow SSH connections") could easily enough be parallel construction prompted by The Powers That Be (tm) aware of this effort for other reasons -- which range from "we know our adversaries are trying to insert this code" to "we run our own audits but don't want to reveal their details directly". Even in such a situation it's a bit unclear who the parties would be (nation-state intelligence agencies, possibly certain large corporations independent of their respective governments). The obvious claim would be something like "NSA launders data to Microsoft to foil North Korean hacking attempts", but "China foils NSA backdoor attempts" isn't completely implausible either.

That said, I can only imagine that sneaking a backdoor like this into proprietary build systems would be even less likely to be detected: the pool of people inspecting the Windows build system is much smaller than those looking at (or at least able to look at) libxz and it's (arcane, but somewhat industry standard) autoconf scripts.

Also, this is the sort of thing that I have a vested interest in as a long-time personal and professional Linux user. I have the skills ("a very particular set of skills") to follow the details of issues like this, but there isn't yet any organized way to actually contribute them. I'd be willing to spend maybe a few hours a month auditing code and reviewing changes to "boring" system packages, but I'd never think to look at libxz specifically, or to get enough "street cred" for people to actually take any feedback I have seriously. And even then, this particular issue is underhanded enough to be hard to spot even when an expert is looking right at it. Does anyone have any suggestions for getting involved like this?