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backdoor in upstream xz/liblzma leading to ssh server compromise (www.openwall.com)

submitted 8 months ago by Atemu@lemmy.ml to c/linux@lemmy.ml

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[-] tal@lemmy.today 3 points 8 months ago* (last edited 8 months ago)

Apparently the backdoor reverts back to regular operation if the payload is malformed or the signature from the attacker's key doesn't verify. Unfortunately, this means that unless a bug is found, we can't write a reliable/reusable over-the-network scanner.

Maybe not. But it does mean that you can write a crawler that slams the door shut for the attacker on any vulnerable systems.

EDIT: Oh, maybe he just means that it reverts for that single invocation.

this post was submitted on 29 Mar 2024

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