Off-by-one error in the XML signature feature in Apache XML Security for C++ 1.6.0, as used in Shibboleth before 2.4.3 and possibly other products, allows remote attackers to cause a denial of service (crash) via a signature using a large RSA key, which triggers a buffer overflow.

Fix CVE-2011-2516: Apache Santuario XML Security for C++ contains buffer overflows signing or verifying with large keys.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It has been discovered that xml-security-c, an implementation of the XML Digital Signature and Encryption specifications, is not properly handling RSA keys of sizes on the order of 8192 or more bits. This allows an attacker to crash applications using this functionality or potentially execute arbitrary code by tricking an application into verifying a signature created with a sufficiently long RSA key.

ID	Name	Product	Family	Severity
55740	Fedora 14 : xml-security-c-1.5.1-4.fc14 (2011-9501)	Nessus	Fedora Local Security Checks	medium
55739	Fedora 15 : xml-security-c-1.5.1-5.fc15 (2011-9494)	Nessus	Fedora Local Security Checks	medium
55555	Debian DSA-2277-1 : xml-security-c - stack-based buffer overflow	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2011-2516

high

Tenable Plugins

medium

medium

medium