CVE-2013-2076

NameCVE-2013-2076
DescriptionXen 4.0.x, 4.1.x, and 4.2.x, when running on AMD64 processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one domain to determine portions of the state of floating point instructions of other domains, which can be leveraged to obtain sensitive information such as cryptographic keys, a similar vulnerability to CVE-2006-1056. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.
SourceCVE (at NVD; LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3006-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)wheezy (security), wheezy4.1.4-3+deb7u9fixed
jessie4.4.1-9+deb8u4fixed
jessie (security)4.4.1-9+deb8u5fixed
stretch, sid4.6.0-1+nmu2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)4.2.2-1medium
xensourcesqueeze(unfixed)end-of-life
xensourcewheezy4.1.4-3+deb7u2mediumDSA-3006-1

Notes

[squeeze] - xen <end-of-life> (Unsupported in squeeze-lts)
http://lists.xen.org/archives/html/xen-announce/2013-06/msg00002.html

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