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Test ID:1.3.6.1.4.1.25623.1.0.702662
Category:Debian Local Security Checks
Title:Debian Security Advisory DSA 2662-1 (xen - several vulnerabilities)
Summary:Multiple vulnerabilities have been discovered in the Xen hypervisor. The;Common Vulnerabilities and Exposures project identifies the following;problems:;;CVE-2013-1917;The SYSENTER instruction can be used by PV guests to accelerate;system call processing. This instruction, however, leaves the EFLAGS;register mostly unmodified. This can be used by malicious or buggy;user space to cause the entire host to crash.;;CVE-2013-1919;Various IRQ related access control operations may not have the;intended effect, potentially permitting a stub domain to grant its;client domain access to an IRQ it doesn't have access to itself.;This can be used by malicious or buggy stub domains kernels to mount;a denial of service attack possibly affecting the whole system.
Description:Summary:
Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:

CVE-2013-1917
The SYSENTER instruction can be used by PV guests to accelerate
system call processing. This instruction, however, leaves the EFLAGS
register mostly unmodified. This can be used by malicious or buggy
user space to cause the entire host to crash.

CVE-2013-1919
Various IRQ related access control operations may not have the
intended effect, potentially permitting a stub domain to grant its
client domain access to an IRQ it doesn't have access to itself.
This can be used by malicious or buggy stub domains kernels to mount
a denial of service attack possibly affecting the whole system.

Affected Software/OS:
xen on Debian Linux

Solution:
For the stable distribution (squeeze), these problems have been fixed in
version 4.0.1-5.9.

For the testing distribution (wheezy) and the unstable distribution
(sid), these problems will be fixed soon.

We recommend that you upgrade your xen packages.

CVSS Score:
4.7

CVSS Vector:
AV:L/AC:M/Au:N/C:N/I:N/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2013-1917
Debian Security Information: DSA-2662 (Google Search)
http://www.debian.org/security/2012/dsa-2662
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104537.html
http://security.gentoo.org/glsa/glsa-201309-24.xml
http://www.openwall.com/lists/oss-security/2013/04/18/8
http://www.securitytracker.com/id/1028455
http://secunia.com/advisories/55082
SuSE Security Announcement: SUSE-SU-2014:0411 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html
SuSE Security Announcement: SUSE-SU-2014:0446 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
SuSE Security Announcement: SUSE-SU-2014:0470 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
SuSE Security Announcement: openSUSE-SU-2013:0912 (Google Search)
http://lists.opensuse.org/opensuse-updates/2013-06/msg00049.html
Common Vulnerability Exposure (CVE) ID: CVE-2013-1919
BugTraq ID: 59292
http://www.securityfocus.com/bid/59292
http://www.debian.org/security/2013/dsa-2662
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/104538.html
http://www.openwall.com/lists/oss-security/2013/04/18/6
CopyrightCopyright (C) 2013 Greenbone Networks GmbH http://greenbone.net

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