Vulnerability Monitor

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CVE-2016-9386

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

Published

2017-01-23T21:59:02.957

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.8 (HIGH)

CVSSv2 Vector

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

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

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-264

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	citrix	xenserver	6.0.2	Yes
Application	citrix	xenserver	6.2.0	Yes
Application	citrix	xenserver	6.5	Yes
Application	citrix	xenserver	7.0	Yes
Operating System	xen	xen	*	Yes

References

http://www.securityfocus.com/bid/94471 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1037340 Third Party Advisory, VDB Entry ([email protected])
http://xenbits.xen.org/xsa/advisory-191.html Patch, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/201612-56 ([email protected])
https://support.citrix.com/article/CTX218775 Patch, Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/94471 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1037340 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-191.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201612-56 (af854a3a-2127-422b-91ae-364da2661108)
https://support.citrix.com/article/CTX218775 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)