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CVE-2013-0339

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…

Published Jan 21, 2014xmlsoftCWE-264EPSS 3.61%

Overview

CVE-2013-0339 is a medium-severity vulnerability affecting xmlsoft libxml2. It was published on January 21, 2014 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from xmlsoft. Update libxml2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
xmlsoftlibxml20Affected

References

Reflists.opensuse.org/opensuse-security-announce/2013-11/msg00002.htmlRefopenwall.com/lists/oss-security/2013/02/21/24Refopenwall.com/lists/oss-security/2013/02/22/3Refseclists.org/oss-sec/2013/q4/182Refseclists.org/oss-sec/2013/q4/184Refseclists.org/oss-sec/2013/q4/188Refsecunia.com/advisories/52662Refsecunia.com/advisories/54172Refsecunia.com/advisories/55568Refwww.debian.org/security/2013/dsa-2652

How CyberStrike helps

Frequently asked questions

What is CVE-2013-0339?

CVE-2013-0339 is a medium-severity vulnerability affecting xmlsoft libxml2. It was published on January 21, 2014 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2013-0339?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-0339?

Check the references section for vendor advisories and patches from xmlsoft. Update libxml2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-0339?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-0339 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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