CVE-2015-4164
8.1 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
25.7%
The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.
References
lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html
lists.opensuse.org/opensuse-security-announce/2015-07/msg00014.html
lists.opensuse.org/opensuse-security-announce/2015-09/msg00027.html
support.citrix.com/article/CTX201145
www.debian.org/security/2015/dsa-3286
www.securityfocus.com/bid/75149
www.securitytracker.com/id/1032569
xenbits.xen.org/xsa/advisory-136.html
security.gentoo.org/glsa/201604-03
Related
8.1 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
25.7%