Gentoo: GLSA-202403-04: XZ utils: Backdoor in release tarballs
Summary
A backdoor has been discovered in XZ utils. Please review the CVE
identifier referenced below for details.
Resolution
All XZ utils users should downgrade to the latest version before the
backdoor was introduced:
# emerge --sync
# emerge --ask --oneshot --verbose "
References
[ 1 ] CVE-2024-3094
https://nvd.nist.gov/vuln/detail/CVE-2024-3094
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202403-04
Concerns
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
Background
XZ Utils is free general-purpose data compression software with a high
compression ratio.
Affected Packages
Package Vulnerable Unaffected
----------------- ------------ ------------
app-arch/xz-utils >= 5.6.0 < 5.6.0
Impact
Our current understanding of the backdoor is that is does not affect
Gentoo systems, because
1. the backdoor only appears to be included on specific systems and
Gentoo does not qualify;
2. the backdoor as it is currently understood targets OpenSSH patched to
work with systemd-notify support. Gentoo does not support or include
these patches;
Analysis is still ongoing, however, and additional vectors may still be
identified. For this reason we are still issuing this advisory as if
that will be the case.
Workaround
There is no known workaround at this time.