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.
| Type | CWE ID | Description |
|---|---|---|
| text | N/A | n/a |
| Version | Base score | Base severity | Vector |
|---|
| CAPEC ID | Description |
|---|
| Event | Date |
|---|
| Hyperlink | Resource |
|---|---|
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | x_refsource_CONFIRM |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html | vendor-advisory x_refsource_FEDORA |
| http://www.securityfocus.com/bid/85714 | vdb-entry x_refsource_BID |
| http://xenbits.xen.org/xsa/xsa172-4.3.patch | x_refsource_CONFIRM |
| http://xenbits.xen.org/xsa/advisory-172.html | x_refsource_CONFIRM |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html | vendor-advisory x_refsource_FEDORA |
| http://xenbits.xen.org/xsa/xsa172.patch | x_refsource_CONFIRM |
| http://www.securitytracker.com/id/1035435 | vdb-entry x_refsource_SECTRACK |
| http://support.citrix.com/article/CTX209443 | x_refsource_CONFIRM |
| http://www.debian.org/security/2016/dsa-3554 | vendor-advisory x_refsource_DEBIAN |
| Version | Base score | Base severity | Vector |
|---|
| CAPEC ID | Description |
|---|
| Event | Date |
|---|
| Hyperlink | Resource |
|---|---|
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | x_refsource_CONFIRM x_transferred |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html | vendor-advisory x_refsource_FEDORA x_transferred |
| http://www.securityfocus.com/bid/85714 | vdb-entry x_refsource_BID x_transferred |
| http://xenbits.xen.org/xsa/xsa172-4.3.patch | x_refsource_CONFIRM x_transferred |
| http://xenbits.xen.org/xsa/advisory-172.html | x_refsource_CONFIRM x_transferred |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html | vendor-advisory x_refsource_FEDORA x_transferred |
| http://xenbits.xen.org/xsa/xsa172.patch | x_refsource_CONFIRM x_transferred |
| http://www.securitytracker.com/id/1035435 | vdb-entry x_refsource_SECTRACK x_transferred |
| http://support.citrix.com/article/CTX209443 | x_refsource_CONFIRM x_transferred |
| http://www.debian.org/security/2016/dsa-3554 | vendor-advisory x_refsource_DEBIAN x_transferred |