CVE-2023-2804

Name	CVE-2023-2804
Description	A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file. The vulnerability can only be exploited with 12-bit data precision for which the range of the sample data type exceeds the valid sample range, hence, an attacker could craft a 12-bit lossless JPEG image that contains out-of-range 12-bit samples. An application attempting to decompress such image using merged upsampling would lead to segmentation fault or buffer overflows, causing an application to crash.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libjpeg-turbo (PTS)	bullseye	1:2.0.6-4	fixed
	bookworm	1:2.1.5-2	fixed
	sid, trixie	1:2.1.5-3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libjpeg-turbo	source	(unstable)	(not affected)

Notes

- libjpeg-turbo <not-affected> (Vulnerable code not present)
https://github.com/libjpeg-turbo/libjpeg-turbo/issues/675
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/9f756bc67a84d4566bf74a0c2432aa55da404021