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Reblogged by jsonstein@masto.deoan.org ("Jeff Sonstein"):

vegard ("Vegard Nossum") wrote:

Upstream backdoor discovered in xz-utils/liblzma: https://www.openwall.com/lists/oss-security/2024/03/29/4

It seems to affect ssh authentication.

As far as we know, only xz-utils 5.6.0/5.6.1 are affected and these are luckily not yet widely deployed.