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Debian Security Advisory DSA 2659-1 (libapache-mod-security - XML external entity processing vulnerability)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Timur Yunusov and Alexey Osipov from Positive Technologies discovered that the XML files parser of ModSecurity, an Apache module whose purpose is to tighten the Web application security, is vulnerable to XML external entities attacks. A specially-crafted XML file provided by a remote attacker, could lead to local file disclosure or excessive resources (CPU, memory) consumption when processed. This update introduces a SecXmlExternalEntity option which is Off by default. This will disable the ability of libxml2 to load external entities.
Affected Software
Affected Software
libapache-mod-security on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the stable distribution (squeeze), this problem has been fixed in version 2.5.12-1+squeeze2. For the testing distribution (wheezy), this problem has been fixed in version 2.6.6-6 of the modsecurity-apache package. For the unstable distribution (sid), this problem has been fixed in version 2.6.6-6 of the modsecurity-apache package. We recommend that you upgrade your libapache-mod-security packages.