CVE-2014-7155

Impact

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

Weakness classification

References

• NVD record
• CVE.org record
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
• http://secunia.com/advisories/61858
• http://secunia.com/advisories/61890
• http://security.gentoo.org/glsa/glsa-201412-42.xml
• http://support.citrix.com/article/CTX200218
• http://www.debian.org/security/2014/dsa-3041
• http://www.securityfocus.com/bid/70057
• http://www.securitytracker.com/id/1030888
• http://xenbits.xen.org/xsa/advisory-105.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
• http://secunia.com/advisories/61858
• http://secunia.com/advisories/61890
• http://security.gentoo.org/glsa/glsa-201412-42.xml
• http://support.citrix.com/article/CTX200218
• http://www.debian.org/security/2014/dsa-3041
• http://www.securityfocus.com/bid/70057
• http://www.securitytracker.com/id/1030888
• http://xenbits.xen.org/xsa/advisory-105.html