Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | <= 4.4.0 |
| Debian | Debian Linux | 7.0 |
| Fedoraproject | Fedora | 19 |
| Opensuse | Opensuse | 12.3 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htThird 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 AdvisoryVDB Entry
- http://www.securitytracker.com/id/1030888Third Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-105.htmlPatchVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.htmlThird Party Advisory
FAQ
What is CVE-2014-7155?
CVE-2014-7155 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 (...
How severe is CVE-2014-7155?
CVE-2014-7155 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2014-7155?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Debian Debian Linux, Fedoraproject Fedora, Opensuse Opensuse.