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Message-ID: <16d86f5b-93b7-4c13-8dd4-ffea7d7577fe@oracle.com>
Date: Fri, 29 Mar 2024 20:32:42 +0100
From: Vegard Nossum <vegard.nossum@...cle.com>
To: oss-security@...ts.openwall.com, Ivan Delalande <colona@....fr>,
Andres Freund <andres@...razel.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: backdoor in upstream xz/liblzma leading to ssh
server compromise
On 29/03/2024 19:54, Ivan Delalande wrote:
> On Fri, Mar 29, 2024 at 08:51:26AM -0700, Andres Freund wrote:
>> For which the exploit code was then adjusted:
>> https://github.com/tukaani-project/xz/commit/6e636819e8f070330d835fce46289a3ff72a7b89
>>
>> Given the activity over several weeks, the committer is either directly
>> involved or there was some quite severe compromise of their
>> system. Unfortunately the latter looks like the less likely explanation, given
>> they communicated on various lists about the "fixes" mentioned above.
> Knowing this, I hope the recent kernel patch series involving the same
> person to some degree will get extra scrutiny:
> https://lore.kernel.org/lkml/20240320183846.19475-1-lasse.collin@tukaani.org/t/
I *think* this patch series is safe and was just pushed to make more
people upgrade to newer versions faster (you'll notice the BCJ filters
are Co-developed-by: Jia -- not implying that Lasse was acting in bad
faith here).
Of course it still deserves more scrutiny...
Vegard
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