Ubuntu Security Notice USN-696-1
18th December, 2008
avahi vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 7.10
- Ubuntu 6.06 LTS
Software description
- avahi
Details
Emanuele Aina discovered that Avahi did not properly validate its input when
processing data over D-Bus. A local attacker could send an empty TXT message
via D-Bus and cause a denial of service (failed assertion). This issue only
affected Ubuntu 6.06 LTS. (CVE-2007-3372)
Hugo Dias discovered that Avahi did not properly verify its input when
processing mDNS packets. A remote attacker could send a crafted mDNS packet
and cause a denial of service (assertion failure). (CVE-2008-5081)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 8.10:
- avahi-daemon 0.6.23-2ubuntu2.1
- Ubuntu 8.04 LTS:
- avahi-daemon 0.6.22-2ubuntu4.1
- Ubuntu 7.10:
- avahi-daemon 0.6.20-2ubuntu3.4
- Ubuntu 6.06 LTS:
- avahi-daemon 0.6.10-0ubuntu3.5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.