SuSE 11.3 Security Update : Xen (SAT Patch Number 8973)

This script is Copyright (C) 2014 Tenable Network Security, Inc.


Synopsis :

The remote SuSE 11 host is missing one or more security updates.

Description :

The SUSE Linux Enterprise Server 11 Service Pack 3 Xen hypervisor and
toolset has been updated to 4.2.4 to fix various bugs and security
issues :

The following security issues have been addressed :

- XSA-60: CVE-2013-2212: The vmx_set_uc_mode function in
Xen 3.3 through 4.3, when disabling chaches, allows
local HVM guests with access to memory mapped I/O
regions to cause a denial of service (CPU consumption
and possibly hypervisor or guest kernel panic) via a
crafted GFN range. (bnc#831120)

- XSA-80: CVE-2013-6400: Xen 4.2.x and 4.3.x, when using
Intel VT-d and a PCI device has been assigned, does not
clear the flag that suppresses IOMMU TLB flushes when
unspecified errors occur, which causes the TLB entries
to not be flushed and allows local guest administrators
to cause a denial of service (host crash) or gain
privileges via unspecified vectors. (bnc#853048)

- 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)

- XSA-83: CVE-2014-1642: The IRQ setup in Xen 4.2.x and
4.3.x, when using device passthrough and configured to
support a large number of CPUs, frees certain memory
that may still be intended for use, which allows local
guest administrators to cause a denial of service
(memory corruption and hypervisor crash) and possibly
execute arbitrary code via vectors related to an
out-of-memory error that triggers a (1) use-after-free
or (2) double free. (bnc#860092)

- XSA-84: CVE-2014-1891: The FLASK_{GET,SET}BOOL,
FLASK_USER and FLASK_CONTEXT_TO_SID suboperations of the
flask hypercall are vulnerable to an integer overflow on
the input size. The hypercalls attempt to allocate a
buffer which is 1 larger than this size and is therefore
vulnerable to integer overflow and an attempt to
allocate then access a zero byte buffer. (bnc#860163)

- XSA-84: CVE-2014-1892 / CVE-2014-1893: Xen 3.3 through
4.1, while not affected by the above overflow, have a
different overflow issue on FLASK_{GET,SET}BOOL and
expose unreasonably large memory allocation to
aribitrary guests. (bnc#860163)

- XSA-84: CVE-2014-1894: Xen 3.2 (and presumably earlier)
exhibit both problems with the overflow issue being
present for more than just the suboperations listed
above. (bnc#860163)

- XSA-85: CVE-2014-1895: The FLASK_AVC_CACHESTAT
hypercall, which provides access to per-cpu statistics
on the Flask security policy, incorrectly validates the
CPU for which statistics are being requested.
(bnc#860165)

- XSA-86: CVE-2014-1896: libvchan (a library for
inter-domain communication) does not correctly handle
unusual or malicious contents in the xenstore ring. A
malicious guest can exploit this to cause a
libvchan-using facility to read or write past the end of
the ring. (bnc#860300)

- XSA-87: CVE-2014-1666: The do_physdev_op function in Xen
4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not
properly restrict access to the (1)
PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix
operations, which allows local PV guests to cause a
denial of service (host or guest malfunction) or
possibly gain privileges via unspecified vectors.
(bnc#860302)

- XSA-88: CVE-2014-1950: Use-after-free vulnerability in
the xc_cpupool_getinfo function in Xen 4.1.x through
4.3.x, when using a multithreaded toolstack, does not
properly handle a failure by the xc_cpumap_alloc
function, which allows local users with access to
management functions to cause a denial of service (heap
corruption) and possibly gain privileges via unspecified
vectors. (bnc#861256)

Also the following non-security bugs have been fixed :

- Fixed boot problems with Xen kernel. '(XEN) setup
0000:00:18.0 for d0 failed (-19)'. (bnc#858311)

- Fixed Xen hypervisor panic on 8-blades nPar with 46-bit
memory addressing. (bnc#848014)

- Fixed Xen hypervisor panic in HP's UEFI x86_64 platform
and with xen environment, in booting stage. (bnc#833251)

- xend/pvscsi: recognize also SCSI CDROM devices.
(bnc#863297)

- pygrub: Support (/dev/xvda) style disk specifications

See also :

https://bugzilla.novell.com/show_bug.cgi?id=831120
https://bugzilla.novell.com/show_bug.cgi?id=833251
https://bugzilla.novell.com/show_bug.cgi?id=848014
https://bugzilla.novell.com/show_bug.cgi?id=853048
https://bugzilla.novell.com/show_bug.cgi?id=853049
https://bugzilla.novell.com/show_bug.cgi?id=858311
https://bugzilla.novell.com/show_bug.cgi?id=860092
https://bugzilla.novell.com/show_bug.cgi?id=860163
https://bugzilla.novell.com/show_bug.cgi?id=860165
https://bugzilla.novell.com/show_bug.cgi?id=860300
https://bugzilla.novell.com/show_bug.cgi?id=860302
https://bugzilla.novell.com/show_bug.cgi?id=861256
https://bugzilla.novell.com/show_bug.cgi?id=863297
http://support.novell.com/security/cve/CVE-2013-2212.html
http://support.novell.com/security/cve/CVE-2013-6400.html
http://support.novell.com/security/cve/CVE-2013-6885.html
http://support.novell.com/security/cve/CVE-2014-1642.html
http://support.novell.com/security/cve/CVE-2014-1666.html
http://support.novell.com/security/cve/CVE-2014-1891.html
http://support.novell.com/security/cve/CVE-2014-1892.html
http://support.novell.com/security/cve/CVE-2014-1893.html
http://support.novell.com/security/cve/CVE-2014-1894.html
http://support.novell.com/security/cve/CVE-2014-1895.html
http://support.novell.com/security/cve/CVE-2014-1896.html
http://support.novell.com/security/cve/CVE-2014-1950.html

Solution :

Apply SAT patch number 8973.

Risk factor :

High / CVSS Base Score : 8.3
(CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C)

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