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…
Does this matter?
Lower severity and a low EPSS score (0.97%). Track it; it rarely justifies an emergency change on its own.
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 2.0
- 5.8 MEDIUMAV:A/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 0.97% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- xen/xen · debian/debian linux · fedoraproject/fedora · opensuse/opensuse
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.