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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Felix Lechner From: Felix Lechner via "Development of GNU Guix and the GNU System distribution." Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN X-Spam-Score: -6.70 X-Migadu-Queue-Id: 55CB83A677 X-Migadu-Scanner: mx13.migadu.com X-Migadu-Spam-Score: -6.70 X-TUID: /i9Lo2kSbxdw Hi Ryan, On Fri, Mar 29 2024, Ryan Prior wrote: > I'm reading today that a backdoor is present in xz's upstream tarball > (but not in git), starting at version 5.6.0. Source: > https://www.openwall.com/lists/oss-security/2024/03/29/4 Thanks for sending this! This is an extremely serious vulnerability with criminal intent. I cc'd guix-security@gnu.org just in case you haven't. > Guix currently packages xz-utils 5.2.8 as "xz" using the upstream > tarball. [...] Should we switch from using upstream tarballs to some > fork with more responsible maintainers? Guix's habit of building from tarballs is a poor idea because tarballs often differ. For example, maintainers may choose to ship a ./configure script that is otherwise not present in Git (although a configure.ac might be). Guix should build from Git. > Is there a way we can blacklist known bad versions? Having said all that, I am not sure Guix is affected. On my systems, the 'detect.sh' script shows no referece to liblzma in sshd. Everyone, please send additional reports. Kind regards Felix