CVE-2021-45955

Name	CVE-2021-45955
Description	DISPUTED Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge." However, a contributor states that a security patch (mentioned in 016162.html) is needed.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dnsmasq (PTS)	stretch	2.76-5+deb9u2	vulnerable
	stretch (security)	2.76-5+deb9u3	vulnerable
	buster, buster (security)	2.80-1+deb10u1	vulnerable
	bullseye	2.85-1	vulnerable
	bookworm, sid	2.86-1.1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dnsmasq	source	(unstable)	(unfixed)	unimportant

Notes

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml
Non issue, result of poorly automated fuzzing effort