What’s Vulnerable › Vulnerabilities

CVE-2013-6438

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 27.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2014-03-18 · updated 2026-06-17

Description

The dav_xml_get_cdata function in main/util.c in the mod_dav module in the Apache HTTP Server before 2.4.8 does not properly remove whitespace characters from CDATA sections, which allows remote attackers to cause a denial of service (daemon crash) via a crafted DAV WRITE request.

Affected products

• Apache HTTP Server: from 2.2.0 before 2.2.27; from 2.4.1 before 2.4.9 — fixed in 2.2.27, 2.4.9
• Canonical Ubuntu Linux: 10.04, 12.04, 12.10, 13.10
• Oracle Corporation Oracle HTTP Server: 10.1.3.5.0, 11.1.1.7.0, 12.1.2.0, 12.1.3.0

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.2.27, 2.4.9. Check the vendor advisory for mitigations.

References

• http://advisories.mageia.org/MGASA-2014-0135.html
• http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10698
• http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
• http://marc.info/?l=bugtraq&m=141017844705317&w=2
• http://marc.info/?l=bugtraq&m=141390017113542&w=2
• http://seclists.org/fulldisclosure/2014/Dec/23
• http://secunia.com/advisories/58230
• http://secunia.com/advisories/59315
• http://secunia.com/advisories/59345
• http://secunia.com/advisories/60536
• http://security.gentoo.org/glsa/glsa-201408-12.xml

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