Input validation error in Xen - CVE-2012-4544

Detailed vulnerability description

The vulnerability allows a local non-authenticated attacker to perform service disruption.

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk (1) before or (2) after decompression, which allows local guest administrators to cause a denial of service (domain 0 memory consumption) via a crafted (a) kernel or (b) ramdisk.

How to mitigate CVE-2012-4544

Sources

• http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091832.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091844.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-November/092050.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00008.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00009.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html
• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
• http://osvdb.org/86619
• http://rhn.redhat.com/errata/RHSA-2013-0241.html
• http://secunia.com/advisories/51071
• http://secunia.com/advisories/51324
• http://secunia.com/advisories/51352
• http://secunia.com/advisories/51413
• http://www.debian.org/security/2013/dsa-2636
• http://www.openwall.com/lists/oss-security/2012/10/26/3
• http://www.securityfocus.com/bid/56289
• http://www.securitytracker.com/id?1027699
• https://exchange.xforce.ibmcloud.com/vulnerabilities/79617