CVE-2015-0239
4.4 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
6.3 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
51.8%
The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.
Affected configurations
References
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f3747379accba8e95d70cec0eae0582c8c182050
permalink.gmane.org/gmane.linux.kernel.commits.head/502245
rhn.redhat.com/errata/RHSA-2015-1272.html
www.debian.org/security/2015/dsa-3170
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.5
www.mandriva.com/security/advisories?name=MDVSA-2015:058
www.openwall.com/lists/oss-security/2015/01/27/6
www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
www.securityfocus.com/bid/72842
www.ubuntu.com/usn/USN-2513-1
www.ubuntu.com/usn/USN-2514-1
www.ubuntu.com/usn/USN-2515-1
www.ubuntu.com/usn/USN-2516-1
www.ubuntu.com/usn/USN-2517-1
www.ubuntu.com/usn/USN-2518-1
bugzilla.redhat.com/show_bug.cgi?id=1186448
github.com/torvalds/linux/commit/f3747379accba8e95d70cec0eae0582c8c182050
Related
4.4 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
6.3 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
51.8%