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.
Metrics
CVSS 2.0 5.8/10
AV:A/AC:L/Au:N/C:P/I:P/A:PWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htmlThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.htmlThird Party Advisory
- http://secunia.com/advisories/61858
- http://secunia.com/advisories/61890
- http://security.gentoo.org/glsa/glsa-201412-42.xml
- http://support.citrix.com/article/CTX200218Third Party Advisory
- http://www.debian.org/security/2014/dsa-3041Third Party Advisory
- http://www.securityfocus.com/bid/70057Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1030888Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-105.htmlPatch, Vendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htmlThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.htmlThird Party Advisory
- http://secunia.com/advisories/61858
- http://secunia.com/advisories/61890
- http://security.gentoo.org/glsa/glsa-201412-42.xml
- http://support.citrix.com/article/CTX200218Third Party Advisory
- http://www.debian.org/security/2014/dsa-3041Third Party Advisory
- http://www.securityfocus.com/bid/70057Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1030888Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-105.htmlPatch, Vendor Advisory
Timeline
- Published
- Oct 2, 2014
- Last modified
- Jun 17, 2026
- NVD status
- Modified