CVE-2013-1917 Information

Description

Xen 3.1 through 4.x when running 64-bit hosts on Intel CPUs does not clear the NT flag when using an IRET after a SYSENTER instruction which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a GP fault which is not properly handled by another IRET instruction.

Reference

http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104537.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://lists.opensuse.org/opensuse-updates/2013-06/msg00049.html http://secunia.com/advisories/55082 http://security.gentoo.org/glsa/glsa-201309-24.xml http://www.debian.org/security/2012/dsa-2662 http://www.openwall.com/lists/oss-security/2013/04/18/8 http://www.securitytracker.com/id/1028455