CVE-2021-3468

NameCVE-2021-3468
DescriptionA flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow
Debian Bugs984938

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
avahi (PTS)stretch0.6.32-2vulnerable
buster0.7-4+deb10u1vulnerable
bookworm, sid, bullseye0.8-5vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
avahisource(unstable)(unfixed)984938

Notes

[bullseye] - avahi <no-dsa> (Minor issue)
[buster] - avahi <no-dsa> (Minor issue)
[stretch] - avahi <postponed> (Minor issue; can be fixed in next DLA)
https://github.com/lathiat/avahi/pull/330
https://bugzilla.redhat.com/show_bug.cgi?id=1939614#c3

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