CVE-2016-3158 | BDVDB-2026-75229 Detail
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.
Impact#
No impact statement in the source data.
Weaknesses#
No weakness recorded in the source data.
References#
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
- http://www.securityfocus.com/bid/85714
- http://xenbits.xen.org/xsa/xsa172-4.3.patch
- http://xenbits.xen.org/xsa/advisory-172.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
- http://xenbits.xen.org/xsa/xsa172.patch
- http://www.securitytracker.com/id/1035435
- http://support.citrix.com/article/CTX209443
- http://www.debian.org/security/2016/dsa-3554
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.