| Name | CVE-2021-3468 |
| Description | A 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3047-1, DLA-3466-1, ELA-624-1 |
| Debian Bugs | 984938 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| avahi (PTS) | jessie, jessie (lts) | 0.6.31-5+deb8u2 | fixed |
| stretch (security) | 0.6.32-2+deb9u1 | fixed | |
| stretch (lts), stretch | 0.6.32-2+deb9u2 | fixed | |
| buster (security), buster, buster (lts) | 0.7-4+deb10u3 | fixed | |
| bullseye | 0.8-5+deb11u2 | fixed | |
| bookworm | 0.8-10 | fixed | |
| sid, trixie | 0.8-13 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| avahi | source | jessie | 0.6.31-5+deb8u1 | ELA-624-1 | ||
| avahi | source | stretch | 0.6.32-2+deb9u1 | DLA-3047-1 | ||
| avahi | source | buster | 0.7-4+deb10u3 | DLA-3466-1 | ||
| avahi | source | bullseye | 0.8-5+deb11u2 | |||
| avahi | source | (unstable) | 0.8-7 | 984938 |
https://github.com/avahi/avahi/pull/330
https://github.com/avahi/avahi/commit/447affe29991ee99c6b9732fc5f2c1048a611d3b
https://bugzilla.redhat.com/show_bug.cgi?id=1939614#c3
https://github.com/avahi/avahi/security/advisories/GHSA-mrwc-c54v-3rg8