Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xmlsoft | Libxml2 | <= 2.9.1 |
| Canonical | Ubuntu Linux | 10.04 |
| Debian | Debian Linux | 6.0 |
| Suse | Linux Enterprise Server | 10 |
Related Weaknesses (CWE)
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/52662Vendor Advisory
- http://secunia.com/advisories/54172
- http://secunia.com/advisories/55568Vendor Advisory
- 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=4629ee02ac649c27f9c0cf98ba017c6bExploitPatch
FAQ
What is CVE-2013-0339?
CVE-2013-0339 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 att...
How severe is CVE-2013-0339?
CVE-2013-0339 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-0339?
Check the references section above for vendor advisories and patch information. Affected products include: Xmlsoft Libxml2, Canonical Ubuntu Linux, Debian Debian Linux, Suse Linux Enterprise Server.