Red Hat Security Advisory 2014-1436-02 - The X11 libraries provide library routines that are used within all X Window applications. Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way various X11 client libraries handled certain protocol data. An attacker able to submit invalid protocol data to an X11 server via a malicious X11 client could use either of these flaws to potentially escalate their privileges on the system.
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Gentoo Linux Security Advisory 201405-7 - Multiple vulnerabilities have been found in X.Org X Server, allowing attackers to execute arbitrary code or cause a Denial of Service condition. Versions less than 1.14.3-r2 are affected.
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Ubuntu Security Notice 1857-1 - Ilja van Sprundel discovered multiple security issues in various X.org libraries and components. An attacker could use these issues to cause applications to crash, resulting in a denial of service, or possibly execute arbitrary code.
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Ilja van Sprundel of IOActive discovered several security issues in multiple components of the X.org graphics stack and the related libraries: Various integer overflows, sign handling errors in integer conversions, buffer overflows, memory corruption and missing input sanitizing may lead to privilege escalation or denial of service.
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