CVE-2022-42705

Name	CVE-2022-42705
Description	A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 may allow a remote authenticated attacker to crash Asterisk (denial of service) by performing activity on a subscription via a reliable transport at the same time that Asterisk is also performing activity on that subscription.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3335-1, DSA-5358-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
asterisk (PTS)	bullseye (security), bullseye	1:16.28.0~dfsg-0+deb11u4	fixed
	sid	1:20.9.3~dfsg+~cs6.14.60671435-1	fixed

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

Package	Type	Release	Fixed Version	Origin
asterisk	source	buster	1:16.28.0~dfsg-0+deb10u2	DLA-3335-1
asterisk	source	bullseye	1:16.28.0~dfsg-0+deb11u2	DSA-5358-1
asterisk	source	(unstable)	1:20.0.1~dfsg+~cs6.12.40431414-1

Notes

https://issues.asterisk.org/jira/browse/ASTERISK-30244
https://downloads.asterisk.org/pub/security/AST-2022-008.html
https://git.asterisk.org/gitweb/?p=asterisk/asterisk.git;a=commit;h=7684c9e907fb85f5c58b025d9e385ad2600f12a2