Damn, it is actually scary that they managed to pull this off. The backdoor came from the second-largest contributor to xz too, not some random drive-by.
They’ve been contributing to xz for two years, and commited various “test” binary files.
Time to audit all their contributions although it looks like they mostly contribute to xz. I guess we’ll have to wait for comments from the rest of the team or if the whole org needs to be considered comprimised.
there will be federal investigation just speculation if the culprit is a foreign actor