CVE-2013-1917

Name	CVE-2013-1917
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
References	DSA-2662-1
NVD severity	low (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	wheezy	4.1.4-3+deb7u9	fixed
	wheezy (security)	4.1.6.lts1-8	fixed
	jessie	4.4.1-9+deb8u8	fixed
	jessie (security)	4.4.1-9+deb8u9	fixed
	buster, sid, stretch	4.8.1-1+deb9u1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xen	source	(unstable)	4.1.4-3	low
xen	source	squeeze	4.0.1-5.10	low	DSA-2662-1

http://lists.xen.org/archives/html/xen-announce/2013-04/msg00005.html