CVE-2021-42716

Name	CVE-2021-42716
Description	An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when converting to RGBA, leading to a buffer overflow when later reinterpreting the result as a 16-bit buffer. An attacker could potentially have crashed a service using stb_image, or read up to 1024 bytes of non-consecutive heap data without control over the read location.
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)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libstb (PTS)	buster	0.0~git20180212.15.e6afb9c-1	vulnerable
	bookworm, sid, bullseye	0.0~git20200713.b42009b+ds-1	vulnerable

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

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

Notes

[bullseye] - libstb <no-dsa> (Minor issue)
[buster] - libstb <no-dsa> (Minor issue)
https://github.com/nothings/stb/issues/1166
https://github.com/nothings/stb/issues/1225
https://github.com/nothings/stb/pull/1223