SUSE SLES10 Security Update : Xen (SUSE-SU-2014:0470-1)

This script is Copyright (C) 2015 Tenable Network Security, Inc.


Synopsis :

The remote SUSE host is missing one or more security updates.

Description :

The SUSE Linux Enterprise 10 Service Pack 3 LTSS Xen hypervisor and
toolset have been updated to fix various security issues :

The following security issues have been addressed :

XSA-20: CVE-2012-4535: Xen 3.4 through 4.2, and possibly earlier
versions, allows local guest OS administrators to cause a denial of
service (Xen infinite loop and physical CPU consumption) by setting a
VCPU with an 'inappropriate deadline'. (bnc#786516)

XSA-22: CVE-2012-4537: Xen 3.4 through 4.2, and possibly
earlier versions, does not properly synchronize the p2m and
m2p tables when the set_p2m_entry function fails, which
allows local HVM guest OS administrators to cause a denial
of service (memory consumption and assertion failure), aka
'Memory mapping failure DoS vulnerability'. (bnc#786517)

XSA-25: CVE-2012-4544: The PV domain builder in Xen 4.2 and
earlier does not validate the size of the kernel or ramdisk
(1) before or (2) after decompression, which allows local
guest administrators to cause a denial of service (domain 0
memory consumption) via a crafted (a) kernel or (b) ramdisk.
(bnc#787163)

XSA-29: CVE-2012-5513: The XENMEM_exchange handler in Xen
4.2 and earlier does not properly check the memory address,
which allows local PV guest OS administrators to cause a
denial of service (crash) or possibly gain privileges via
unspecified vectors that overwrite memory in the hypervisor
reserved range. (bnc#789951)

XSA-31: CVE-2012-5515: The (1) XENMEM_decrease_reservation,
(2) XENMEM_populate_physmap, and (3) XENMEM_exchange
hypercalls in Xen 4.2 and earlier allow local guest
administrators to cause a denial of service (long loop and
hang) via a crafted extent_order value. (bnc#789950)

XSA-44: CVE-2013-1917: Xen 3.1 through 4.x, when running
64-bit hosts on Intel CPUs, does not clear the NT flag when
using an IRET after a SYSENTER instruction, which allows PV
guest users to cause a denial of service (hypervisor crash)
by triggering a #GP fault, which is not properly handled by
another IRET instruction. (bnc#813673)

XSA-47: CVE-2013-1920: Xen 4.2.x, 4.1.x, and earlier, when
the hypervisor is running 'under memory pressure' and the
Xen Security Module (XSM) is enabled, uses the wrong
ordering of operations when extending the per-domain event
channel tracking table, which causes a use-after-free and
allows local guest kernels to inject arbitrary events and
gain privileges via unspecified vectors. (bnc#813677)

XSA-55: CVE-2013-2196: Multiple unspecified vulnerabilities
in the Elf parser (libelf) in Xen 4.2.x and earlier allow
local guest administrators with certain permissions to have
an unspecified impact via a crafted kernel, related to
'other problems' that are not CVE-2013-2194 or
CVE-2013-2195. (bnc#823011)

XSA-55: CVE-2013-2195: The Elf parser (libelf) in Xen 4.2.x
and earlier allow local guest administrators with certain
permissions to have an unspecified impact via a crafted
kernel, related to 'pointer dereferences' involving
unexpected calculations. (bnc#823011)

XSA-55: CVE-2013-2194: Multiple integer overflows in the Elf
parser (libelf) in Xen 4.2.x and earlier allow local guest
administrators with certain permissions to have an
unspecified impact via a crafted kernel. (bnc#823011)

XSA-63: CVE-2013-4355: Xen 4.3.x and earlier does not
properly handle certain errors, which allows local HVM
guests to obtain hypervisor stack memory via a (1) port or
(2) memory mapped I/O write or (3) other unspecified
operations related to addresses without associated memory.
(bnc#840592)

XSA-67: CVE-2013-4368: The outs instruction emulation in Xen
3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS:
segment override, uses an uninitialized variable as a
segment base, which allows local 64-bit PV guests to obtain
sensitive information (hypervisor stack content) via
unspecified vectors related to stale data in a segment
register. (bnc#842511)

XSA-73: CVE-2013-4494: Xen before 4.1.x, 4.2.x, and 4.3.x
does not take the page_alloc_lock and grant_table.lock in
the same order, which allows local guest administrators with
access to multiple vcpus to cause a denial of service (host
deadlock) via unspecified vectors. (bnc#848657)

XSA-76: CVE-2013-4554: Xen 3.0.3 through 4.1.x (possibly
4.1.6.1), 4.2.x (possibly 4.2.3), and 4.3.x (possibly 4.3.1)
does not properly prevent access to hypercalls, which allows
local guest users to gain privileges via a crafted
application running in ring 1 or 2. (bnc#849668)

XSA-82: CVE-2013-6885: The microcode on AMD 16h 00h through
0Fh processors does not properly handle the interaction
between locked instructions and write-combined memory types,
which allows local users to cause a denial of service
(system hang) via a crafted application, aka the errata 793
issue. (bnc#853049)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

See also :

http://www.nessus.org/u?272d101f
http://support.novell.com/security/cve/CVE-2012-4535.html
http://support.novell.com/security/cve/CVE-2012-4537.html
http://support.novell.com/security/cve/CVE-2012-4544.html
http://support.novell.com/security/cve/CVE-2012-5513.html
http://support.novell.com/security/cve/CVE-2012-5515.html
http://support.novell.com/security/cve/CVE-2013-1917.html
http://support.novell.com/security/cve/CVE-2013-1920.html
http://support.novell.com/security/cve/CVE-2013-2194.html
http://support.novell.com/security/cve/CVE-2013-2195.html
http://support.novell.com/security/cve/CVE-2013-2196.html
http://support.novell.com/security/cve/CVE-2013-4355.html
http://support.novell.com/security/cve/CVE-2013-4368.html
http://support.novell.com/security/cve/CVE-2013-4494.html
http://support.novell.com/security/cve/CVE-2013-4554.html
http://support.novell.com/security/cve/CVE-2013-6885.html
https://bugzilla.novell.com/786516
https://bugzilla.novell.com/786517
https://bugzilla.novell.com/787163
https://bugzilla.novell.com/789950
https://bugzilla.novell.com/789951
https://bugzilla.novell.com/813673
https://bugzilla.novell.com/813677
https://bugzilla.novell.com/823011
https://bugzilla.novell.com/840592
https://bugzilla.novell.com/842511
https://bugzilla.novell.com/848657
https://bugzilla.novell.com/849668
https://bugzilla.novell.com/853049
http://www.nessus.org/u?9605316d

Solution :

Update the affected Xen packages

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

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