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.
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
http://support.citrix.com/article/CTX209443
http://www.debian.org/security/2016/dsa-3554
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/85714
http://www.securitytracker.com/id/1035435
http://xenbits.xen.org/xsa/advisory-172.html
Source: MITRE
Published: 2016-04-13
Updated: 2016-12-03
Type: CWE-200
Base Score: 1.7
Vector: AV:L/AC:L/Au:S/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.1
Severity: LOW
Base Score: 3.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Impact Score: 1.4
Exploitability Score: 2
Severity: LOW
OR
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to 4.4.0 (inclusive)
OR
OR
ID | Name | Product | Family | Severity |
---|---|---|---|---|
94608 | SUSE SLES11 Security Update : xen (SUSE-SU-2016:2725-1) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
94269 | SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
94267 | SUSE SLES11 Security Update : xen (SUSE-SU-2016:2528-1) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
94000 | openSUSE Security Update : xen (openSUSE-2016-1170) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
93999 | openSUSE Security Update : xen (openSUSE-2016-1169) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
93298 | SUSE SLES11 Security Update : xen (SUSE-SU-2016:2100-1) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
93296 | SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster) | Nessus | SuSE Local Security Checks | high |
92635 | Debian DLA-571-1 : xen security update (Bunker Buster) | Nessus | Debian Local Security Checks | high |
92601 | OracleVM 3.3 : xen (OVMSA-2016-0089) | Nessus | OracleVM Local Security Checks | high |
92600 | OracleVM 3.4 : xen (OVMSA-2016-0088) (Bunker Buster) | Nessus | OracleVM Local Security Checks | high |
91756 | OracleVM 3.2 : xen (OVMSA-2016-0081) | Nessus | OracleVM Local Security Checks | high |
90638 | Debian DSA-3554-1 : xen - security update | Nessus | Debian Local Security Checks | high |
90470 | Fedora 23 : xen-4.5.3-1.fc23 (2016-e5432ca977) | Nessus | Fedora Local Security Checks | low |
90460 | Fedora 22 : xen-4.5.3-1.fc22 (2016-5f196e4e4a) | Nessus | Fedora Local Security Checks | low |