CVE-2009-1955

Name	CVE-2009-1955
Description	The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564.
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-1812-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
apr-util (PTS)	jessie, jessie (lts)	1.5.4-1+deb8u1	fixed
	stretch (lts), stretch	1.5.4-3+deb9u1	fixed
	buster (security), buster, buster (lts)	1.6.1-4+deb10u1	fixed
	bullseye (security), bullseye	1.6.1-5+deb11u1	fixed
	bookworm	1.6.3-1	fixed
	sid, trixie	1.6.3-3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
apr-util	source	etch	1.2.7+dfsg-2+etch2		DSA-1812-1
apr-util	source	lenny	1.2.12+dfsg-8+lenny2		DSA-1812-1
apr-util	source	(unstable)	1.3.7+dfsg-1	medium