CVE-2011-3639

Name	CVE-2011-3639
Description	The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x before 2.2.18, when the Revision 1179239 patch is in place, does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers by using the HTTP/0.9 protocol with a malformed URI containing an initial @ (at sign) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-2405-1

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	lenny	2.2.9-10+lenny12	DSA-2405-1
apache2	source	squeeze	2.2.16-6+squeeze6	DSA-2405-1
apache2	source	(unstable)	2.2.18-1

Related to CVE-2011-3368 and CVE-2011-4317 but a different issue