Vulnerability in Xen
CVE-2014-7155
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.8 (Medium). Vector: AV:A/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.010 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Xen — versions 3.0.2, 3.0.3, 3.0.4
- Debian Linux — versions 7.0
- Fedoraproject Fedora — versions 19, 20
- openSUSE — versions 12.3, 13.1
Weakness classification (CWE)
References
- lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html (vendor-advisory, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-105.html (Patch, Vendor Advisory)
- support.citrix.com/article/CTX200218 (Third Party Advisory)
- www.securitytracker.com/id/1030888 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2014/dsa-3041 (vendor-advisory, Third Party Advisory)
- secunia.com/advisories/61858 (third-party-advisory)
- secunia.com/advisories/61890 (third-party-advisory)