Description
The 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html ↗
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html ↗
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html ↗
- http://xenbits.xen.org/xsa/advisory-105.html ↗
- http://support.citrix.com/article/CTX200218 ↗
- http://www.securitytracker.com/id/1030888 ↗
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html ↗
- http://www.debian.org/security/2014/dsa-3041 ↗
- http://secunia.com/advisories/61858 ↗
- http://secunia.com/advisories/61890 ↗
- http://security.gentoo.org/glsa/glsa-201412-42.xml ↗
- http://www.securityfocus.com/bid/70057 ↗