CVE-2018-7284

Name	CVE-2018-7284
Description	A Buffer Overflow issue was discovered in Asterisk through 13.19.1, 14.x through 14.7.5, and 15.x through 15.2.1, and Certified Asterisk through 13.18-cert2. When processing a SUBSCRIBE request, the res_pjsip_pubsub module stores the accepted formats present in the Accept headers of the request. This code did not limit the number of headers it processed, despite having a fixed limit of 32. If more than 32 Accept headers were present, the code would write outside of its memory and cause a crash.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DSA-4320-1
Debian Bugs	891227

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
asterisk (PTS)	buster	1:16.2.1~dfsg-1+deb10u2	fixed
	buster (security)	1:16.28.0~dfsg-0+deb10u2	fixed
	bullseye	1:16.28.0~dfsg-0+deb11u1	fixed
	bullseye (security)	1:16.28.0~dfsg-0+deb11u2	fixed
	bookworm, sid	1:20.1.0~dfsg+~cs6.12.40431414-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
asterisk	source	wheezy	(not affected)
asterisk	source	jessie	(not affected)
asterisk	source	stretch	1:13.14.1~dfsg-2+deb9u4	DSA-4320-1
asterisk	source	(unstable)	1:13.20.0~dfsg-1		891227

Notes

[jessie] - asterisk <not-affected> (Vulnerable code not present)
[wheezy] - asterisk <not-affected> (Vulnerable code not present)
http://downloads.asterisk.org/pub/security/AST-2018-004.html
https://issues.asterisk.org/jira/browse/ASTERISK-27640
http://downloads.asterisk.org/pub/security/AST-2018-004-13.diff