CVE-2013-0340

Name	CVE-2013-0340
Description	expat 2.1.0 and earlier does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1001864

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
expat (PTS)	jessie, jessie (lts)	2.1.0-6+deb8u12	vulnerable
	stretch (security)	2.2.0-2+deb9u5	vulnerable
	stretch (lts), stretch	2.2.0-2+deb9u9	vulnerable
	buster, buster (lts)	2.2.6-2+deb10u8	vulnerable
	buster (security)	2.2.6-2+deb10u7	vulnerable
	bullseye	2.2.10-2+deb11u5	vulnerable
	bullseye (security)	2.2.10-2+deb11u6	vulnerable
	bookworm (security), bookworm	2.5.0-1+deb12u1	fixed
	sid, trixie	2.6.4-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
expat	source	experimental	2.4.1-1
expat	source	(unstable)	2.4.1-2	unimportant		1001864

Notes

Expat provides API to mitigate expansion attacks, ultimately under control of the app using Expat
https://people.canonical.com/~ubuntu-security/cve/2013/CVE-2013-0340.html
Fixed by: https://github.com/libexpat/libexpat/pull/466
Followup: https://github.com/libexpat/libexpat/pull/484