Descriptionavahi-daemon in Avahi through 0.6.32 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
avahi (PTS)wheezy0.6.31-2vulnerable
buster, sid, stretch0.6.32-2vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[stretch] - avahi <no-dsa> (Minor issue)
[jessie] - avahi <no-dsa> (Minor issue)
[wheezy] - avahi <no-dsa> (Minor issue)
Task can be performed by blocking at the perimeter UDP port 5353 both for
incoming and outgoing connections.

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