Description
The Avahi daemon in Avahi before 0.6.20 allows attackers to cause a denial of service (exit) via empty TXT data over D-Bus, which triggers an assert error.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | avahi | 0.6.20-2 | — |
| Debian 13 | avahi | 0.6.20-2 | — |
| Debian 12 | avahi | 0.6.20-2 | — |
| Debian 4.0 | avahi | 0.6.16-3etch2 | DSA-1690-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.8-7.2 | openSUSE-SU-2024:10643-1 |
Advisories 2
- DSA-1690-1 avahi - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10643-1 avahi-0.8-7.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 26083 third-party-advisory
- 33220 third-party-advisory
- 20070628 FLEA-2007-0030-1: avahi avahi-glib avahi-sharp mailing-list
- 1018706 vdb-entry
- 33279 third-party-advisory
- SUSE-SR:2007:014 vendor-advisory
- 24614 vdb-entry
- ADV-2007-2317 vdb-entry
- 37507 vdb-entry
- 25811 third-party-advisory
- MDKSA-2007:185 vendor-advisory
- http://avahi.org/changeset/1482
- USN-696-1 vendor-advisory
- DSA-1690 vendor-advisory
- 26791 third-party-advisory
- http://avahi.org/milestone/Avahi%200.6.20
- avahi-assert-dos(35036) vdb-entry