CVE-2014-7155

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.

References

http://xenbits.xen.org/xsa/advisory-105.html

http://www.securitytracker.com/id/1030888

http://www.securityfocus.com/bid/70057

http://www.debian.org/security/2014/dsa-3041

http://support.citrix.com/article/CTX200218

http://security.gentoo.org/glsa/glsa-201412-42.xml

http://secunia.com/advisories/61890

http://secunia.com/advisories/61858

http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3