CVE-2017-6519

Name	CVE-2017-6519
Description	avahi-daemon in Avahi through 0.6.32 and 0.7 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) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	917047

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
avahi (PTS)	jessie, jessie (lts)	0.6.31-5+deb8u2	vulnerable
	stretch (security)	0.6.32-2+deb9u1	vulnerable
	stretch (lts), stretch	0.6.32-2+deb9u2	vulnerable
	buster (security), buster, buster (lts)	0.7-4+deb10u3	vulnerable
	bullseye	0.8-5+deb11u2	fixed
	bookworm	0.8-10	fixed
	sid, trixie	0.8-13	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
avahi	source	(unstable)	0.7-5	unimportant		917047

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=1426712
https://github.com/avahi/avahi/issues/203
https://github.com/avahi/avahi/commit/e111def44a7df4624a4aa3f85fe98054bffb6b4f