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.

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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Two denial of service conditions were discovered in avahi, a Multicast DNS implementation.

Huge Dias discovered that the avahi daemon aborts with an assert error if it encounters a UDP packet with source port 0 (CVE-2008-5081 ).

It was discovered that the avahi daemon aborts with an assert error if it receives an empty TXT record over D-Bus (CVE-2007-3372 ).

Local attackers could send empty TXT data via D-BUS, causing the avahi daemon to exit. CVE-2007-3372 has been assigned to this issue.

The Avahi daemon in 0.6.20 and previous allows attackers to cause a denial of service via empty TXT data over D-Bus, which triggers an assert error.

Updated packages have been patched to prevent this issue.

ID	Name	Product	Family	Severity
36657	Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : avahi vulnerabilities (USN-696-1)	Nessus	Ubuntu Local Security Checks	medium
35253	Debian DSA-1690-1 : avahi - assert errors	Nessus	Debian Local Security Checks	medium
29383	SuSE 10 Security Update : avahi (ZYPP Patch Number 3845)	Nessus	SuSE Local Security Checks	low
27162	openSUSE 10 Security Update : avahi (avahi-3846)	Nessus	SuSE Local Security Checks	low
26105	Mandrake Linux Security Advisory : avahi (MDKSA-2007:185)	Nessus	Mandriva Local Security Checks	low

Detections

Analytics

CVE-2007-3372

high

Tenable Plugins

medium

medium

low

low

low