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CVE-2016-3158
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
The xrstor function in arch/x86/xstate.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076..
CVSSv2.0 Score
- Severity
- Low
- Base Score
- 1.7/10
- Exploit Score
- 3.1/10
- Access Vector
- Local
- Access Complexity
- Low
- Authentication Required
- Single
- Impact Score
- 2.9/10
- Confidentiality Impact
- Partial
- Availability Impact
- None
- Integrity Impact
- None
CVSSv3.1 Score
- Severity
- Low
- Base Score
- 3.8/10
- Exploit Score
- 2/10
- Access Vector
- Local
- Access Complexity
- Low
- Privileges Required
- Low
- Impact Score
- 1.4/10
- Confidentiality Impact
- Low
- Availability Impact
- None
- Integrity Impact
- None
- Scope
- Changed
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
- http://www.securitytracker.com/id/1035435
- http://xenbits.xen.org/xsa/xsa172-4.3.patch
- http://xenbits.xen.org/xsa/xsa172.patch
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
- http://xenbits.xen.org/xsa/advisory-172.html
- http://www.securityfocus.com/bid/85714
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://support.citrix.com/article/CTX209443
- http://www.debian.org/security/2016/dsa-3554