Bug 798117

Summary:	net-dns/avahi: local denial of service (CVE-2021-3502)
Product:	Gentoo Security	Reporter:	John Helmert III <ajak>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED DUPLICATE
Severity:	minor	CC:	blueness, sam
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/lathiat/avahi/issues/338
See Also:	https://bugs.gentoo.org/show_bug.cgi?id=793953
Whiteboard:	B3 [ebuild]
Package list:		Runtime testing required:	---

Description John Helmert III archtester

2021-06-24 00:27:23 UTC

CVE-2021-3502:

A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.


Patch: https://github.com/lathiat/avahi/commit/fd482a74625b8db8547b8cfca3ee3d3c6c721423
Please apply the patch, if suitable.

Comment 1 John Helmert III archtester

2021-06-24 03:04:57 UTC


*** This bug has been marked as a duplicate of bug 793953 ***