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CVE-2014-7155

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Date: October 2, 2014

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.

Language: C

Severity Score

Related Resources (15)

http://www.securityfocus.com/bid/70057
http://secunia.com/advisories/61858
http://www.debian.org/security/2014/dsa-3041
https://nvd.nist.gov/vuln/detail/CVE-2014-7155
http://www.securitytracker.com/id/1030888
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
http://secunia.com/advisories/61890
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
http://support.citrix.com/article/CTX200218
http://security.gentoo.org/glsa/glsa-201412-42.xml
http://xenbits.xen.org/xsa/advisory-105.html
https://security-tracker.debian.org/tracker/CVE-2014-7155
https://www.mend.io/vulnerability-database/CVE-2014-7155

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): ADJACENT
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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