Description
avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows remote attackers to cause a denial of service (infinite loop) via an empty mDNS (1) IPv4 or (2) IPv6 UDP packet to port 5353. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-2244.
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 | 0.6.28-4 | — |
| Debian 13 | avahi | 0.6.28-4 | — |
| Debian 12 | avahi | 0.6.28-4 | — |
| Debian 6.0 | avahi | 0.6.27-2+squeeze1 | DSA-2174-1 |
| Debian 5.0 | avahi | 0.6.23-3lenny3 | DSA-2174-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | avahi +20 | 0.6.25-11.el6 | RHSA-2011:0779 |
| RHEL 5 | avahi +10 | 0.6.16-10.el5_6 | RHSA-2011:0436 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | avahi | 0.6.32-2.3 | openSUSE-SU-2024:10363-1 |
Advisories 4
- RHSA-2011:0779 Red Hat Security Advisory: avahi security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2174-1 avahi - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10363-1 avahi-0.6.32-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2011:0436 Red Hat Security Advisory: avahi security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- RHSA-2011:0779 vendor-advisory
- avahi-udp-packet-dos(65525) vdb-entry
- [oss-security] 20110222 Re: [oss-security] CVE request: avahi daemon remote denial of service by sending NULL UDP mailing-list
- RHSA-2011:0436 vendor-advisory
- ADV-2011-0511 vdb-entry
- [oss-security] 20110218 CVE request: avahi daemon remote denial of service by sending NULL UDP mailing-list
- 43605 third-party-advisory
- 43465 third-party-advisory
- 43673 third-party-advisory
- ADV-2011-0601 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=667187
- ADV-2011-0969 vdb-entry
- avahi-udp-dos(65524) vdb-entry
- 44131 third-party-advisory
- MDVSA-2011:040 vendor-advisory
- 46446 vdb-entry
- MDVSA-2011:037 vendor-advisory
- ADV-2011-0448 vdb-entry
- SUSE-SR:2011:005 vendor-advisory
- DSA-2174 vendor-advisory
- ADV-2011-0499 vdb-entry
- 70948 vdb-entry
- 43361 third-party-advisory
- ADV-2011-0670 vdb-entry
- http://xorl.wordpress.com/2011/02/20/cve-2011-1002-avahi-daemon-remote-denial-of-service/
- http://avahi.org/ticket/325
- FEDORA-2011-3033 vendor-advisory
- ADV-2011-0565 vdb-entry
- http://git.0pointer.de/?p=avahi.git%3Ba=commit%3Bh=46109dfec75534fe270c0ab902576f685d5ab3a6
- USN-1084-1 vendor-advisory
- [oss-security] 20110218 Re: CVE request: avahi daemon remote denial of service by sending NULL UDP mailing-list