CVE-2016-3158

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.

• CWE-200
• CWE-284

• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.htmlThird Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.htmlThird Party Advisory
• http://support.citrix.com/article/CTX209443
• http://www.debian.org/security/2016/dsa-3554
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
• http://www.securityfocus.com/bid/85714Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1035435Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-172.htmlVendor Advisory
• http://xenbits.xen.org/xsa/xsa172-4.3.patchPatch
• http://xenbits.xen.org/xsa/xsa172.patchPatch
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.htmlThird Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.htmlThird Party Advisory
• http://support.citrix.com/article/CTX209443
• http://www.debian.org/security/2016/dsa-3554
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
• http://www.securityfocus.com/bid/85714Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1035435Third Party Advisory, VDB Entry
• http://xenbits.xen.org/xsa/advisory-172.htmlVendor Advisory
• http://xenbits.xen.org/xsa/xsa172-4.3.patchPatch
• http://xenbits.xen.org/xsa/xsa172.patchPatch

Published

Apr 13, 2016

Last Modified

Jun 17, 2026

Status

Modified

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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