CVE-2023-27371

Name	CVE-2023-27371
Description	GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.
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-3374-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libmicrohttpd (PTS)	buster	0.9.62-1	vulnerable
	buster (security)	0.9.62-1+deb10u1	fixed
	bullseye	0.9.72-2	vulnerable
	bookworm	0.9.75-6	fixed
	trixie	1.0.0-2	fixed
	sid	1.0.0-2.1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libmicrohttpd	source	buster	0.9.62-1+deb10u1		DLA-3374-1
libmicrohttpd	source	(unstable)	0.9.75-6

Notes

[bullseye] - libmicrohttpd <no-dsa> (Minor issue)
https://git.gnunet.org/libmicrohttpd.git/commit/?id=e0754d1638c602382384f1eface30854b1defeec (v0.9.76)
https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.html