CVE-2013-4368

Name	CVE-2013-4368
Description	The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DSA-3006-1
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)	jessie	4.4.1-9+deb8u10	fixed
	jessie (security)	4.4.4lts2-0+deb8u1	fixed
	buster, stretch	4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9	fixed
	stretch (security)	4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10	fixed
	sid	4.11.1~pre.20180911.5acdd26fdc+dfsg-5	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
xen	source	(unstable)	4.4.0-1	low
xen	source	squeeze	(unfixed)	end-of-life
xen	source	wheezy	4.1.4-3+deb7u2	low	DSA-3006-1

[squeeze] - xen <end-of-life> (Unsupported in squeeze-lts)