CVE-2021-22924

Name	CVE-2021-22924
Description	libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths case insensitively,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate.
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-2734-1, DLA-3085-1, DSA-5197-1
Debian Bugs	991492

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
curl (PTS)	buster	7.64.0-4+deb10u2	vulnerable
	buster (security)	7.64.0-4+deb10u9	fixed
	bullseye (security), bullseye	7.74.0-1.3+deb11u11	fixed
	bookworm, bookworm (security)	7.88.1-10+deb12u5	fixed
	trixie	8.5.0-2	fixed
	sid	8.7.1-3	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
curl	source	stretch	7.52.1-5+deb9u15	DLA-2734-1
curl	source	buster	7.64.0-4+deb10u3	DLA-3085-1
curl	source	bullseye	7.74.0-1.3+deb11u2	DSA-5197-1
curl	source	(unstable)	7.79.1-1		991492

Notes

https://curl.se/docs/CVE-2021-22924.html
Introduced by: https://github.com/curl/curl/commit/89721ff04af70f527baae1368f3b992777bf6526 (curl-7_10_4)
Fixed by: https://github.com/curl/curl/commit/5ea3145850ebff1dc2b13d17440300a01ca38161 (curl-7_78_0)
https://www.openwall.com/lists/oss-security/2021/07/21/3