Vulnerability Monitor

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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

2014-10-02T14:55:05.120

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.8 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:P/I:P/A:P

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

6.5

Impact Score

6.4

Weaknesses

Type: Primary
CWE-264

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xen	xen	≤ 4.4.0	Yes
Operating System	xen	xen	3.0.2	Yes
Operating System	xen	xen	3.0.3	Yes
Operating System	xen	xen	3.0.4	Yes
Operating System	xen	xen	3.1.3	Yes
Operating System	xen	xen	3.1.4	Yes
Operating System	xen	xen	3.2.0	Yes
Operating System	xen	xen	3.2.1	Yes
Operating System	xen	xen	3.2.2	Yes
Operating System	xen	xen	3.2.3	Yes
Operating System	xen	xen	3.3.0	Yes
Operating System	xen	xen	3.3.1	Yes
Operating System	xen	xen	3.3.2	Yes
Operating System	xen	xen	3.4.0	Yes
Operating System	xen	xen	3.4.1	Yes
Operating System	xen	xen	3.4.2	Yes
Operating System	xen	xen	3.4.3	Yes
Operating System	xen	xen	3.4.4	Yes
Operating System	xen	xen	4.0.0	Yes
Operating System	xen	xen	4.0.1	Yes
Operating System	xen	xen	4.0.2	Yes
Operating System	xen	xen	4.0.3	Yes
Operating System	xen	xen	4.0.4	Yes
Operating System	xen	xen	4.1.0	Yes
Operating System	xen	xen	4.1.1	Yes
Operating System	xen	xen	4.1.2	Yes
Operating System	xen	xen	4.1.3	Yes
Operating System	xen	xen	4.1.4	Yes
Operating System	xen	xen	4.1.5	Yes
Operating System	xen	xen	4.1.6.1	Yes
Operating System	xen	xen	4.2.0	Yes
Operating System	xen	xen	4.2.1	Yes
Operating System	xen	xen	4.2.2	Yes
Operating System	xen	xen	4.2.3	Yes
Operating System	xen	xen	4.3.0	Yes
Operating System	xen	xen	4.3.1	Yes
Operating System	xen	xen	4.4.0	Yes
Operating System	xen	xen	4.4.0	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	fedoraproject	fedora	19	Yes
Operating System	fedoraproject	fedora	20	Yes
Operating System	opensuse	opensuse	12.3	Yes
Operating System	opensuse	opensuse	13.1	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html Third Party Advisory ([email protected])
http://secunia.com/advisories/61858 ([email protected])
http://secunia.com/advisories/61890 ([email protected])
http://security.gentoo.org/glsa/glsa-201412-42.xml ([email protected])
http://support.citrix.com/article/CTX200218 Third Party Advisory ([email protected])
http://www.debian.org/security/2014/dsa-3041 Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/70057 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1030888 Third Party Advisory, VDB Entry ([email protected])
http://xenbits.xen.org/xsa/advisory-105.html Patch, Vendor Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61858 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/61890 (af854a3a-2127-422b-91ae-364da2661108)
http://security.gentoo.org/glsa/glsa-201412-42.xml (af854a3a-2127-422b-91ae-364da2661108)
http://support.citrix.com/article/CTX200218 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2014/dsa-3041 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/70057 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1030888 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-105.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)