CVE-2021-44224

Name	CVE-2021-44224
Description	A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
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-2907-1, DSA-5035-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
apache2 (PTS)	bullseye	2.4.62-1~deb11u1	fixed
	bullseye (security)	2.4.62-1~deb11u2	fixed
	bookworm, bookworm (security)	2.4.62-1~deb12u2	fixed
	sid, trixie	2.4.62-3	fixed

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

Package	Type	Release	Fixed Version	Origin
apache2	source	stretch	2.4.25-3+deb9u12	DLA-2907-1
apache2	source	buster	2.4.38-3+deb10u7	DSA-5035-1
apache2	source	bullseye	2.4.52-1~deb11u2	DSA-5035-1
apache2	source	(unstable)	2.4.52-1

Notes

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2021-44224
Fixed by: https://svn.apache.org/r1895955
Fixed by: https://svn.apache.org/r1896044