CVE-2013-0339

MEDIUM

Description

libxml2 through 2.9.1 does not properly handle external entities expansion unless an application developer uses the xmlSAX2ResolveEntity or xmlSetExternalEntityLoader 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 libxml2 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.

References

http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00002.html

http://openwall.com/lists/oss-security/2013/02/21/24

http://openwall.com/lists/oss-security/2013/02/22/3

http://seclists.org/oss-sec/2013/q4/182

http://seclists.org/oss-sec/2013/q4/184

http://seclists.org/oss-sec/2013/q4/188

http://secunia.com/advisories/52662

http://secunia.com/advisories/54172

http://secunia.com/advisories/55568

http://www.debian.org/security/2013/dsa-2652

http://www.openwall.com/lists/oss-security/2013/04/12/6

http://www.ubuntu.com/usn/USN-1904-1

http://www.ubuntu.com/usn/USN-1904-2

https://bugzilla.redhat.com/show_bug.cgi?id=915149

https://git.gnome.org/browse/libxml2/commit/?id=4629ee02ac649c27f9c0cf98ba017c6b5526070f

Details

Source: MITRE

Published: 2014-01-21

Updated: 2016-05-05

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 6.8

Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM