CVE-2014-7155

NameCVE-2014-7155
DescriptionThe x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3041-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)wheezy4.1.4-3+deb7u9fixed
wheezy (security)4.1.6.lts1-14fixed
jessie (security), jessie4.4.1-9+deb8u10fixed
buster, sid, stretch4.8.3+comet2+shim4.10.0+comet3-1+deb9u5fixed
stretch (security)4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)4.4.1-3medium
xensourcesqueeze(unfixed)end-of-life
xensourcewheezy4.1.4-3+deb7u3mediumDSA-3041-1
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