SUSE SLED11 / SLES11 Security Update : Xen (SUSE-SU-2015:0747-1)

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

The Virtualization service XEN was updated to fix various bugs and
security issues.

The following security issues have been fixed :

CVE-2015-2756: XSA-126: Unmediated PCI command register access in qemu
could have lead to denial of service attacks against the host, if PCI
cards are passed through to guests.

XSA-125: Long latency MMIO mapping operations were not preemptible.

CVE-2015-2151: XSA-123: Instructions with register operands ignored
eventual segment overrides encoded for them. Due to an insufficiently
conditional assignment such a bogus segment override could have,
however, corrupted a pointer used subsequently to store the result of
the instruction.

CVE-2015-2045: XSA-122: The code handling certain sub-operations of
the HYPERVISOR_xen_version hypercall failed to fully initialize all
fields of structures subsequently copied back to guest memory. Due to
this hypervisor stack contents were copied into the destination of the
operation, thus becoming visible to the guest.

CVE-2015-2044: XSA-121: Emulation routines in the hypervisor dealing
with certain system devices checked whether the access size by the
guest is a supported one. When the access size is unsupported these
routines failed to set the data to be returned to the guest for read
accesses, so that hypervisor stack contents were copied into the
destination of the operation, thus becoming visible to the guest.

Also fixed :

Fully virtualized guest install from network source failed with
'cannot find guest domain' in XEN. (bsc#919341)

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?f70b5c93

Solution :

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Software Development Kit 11 SP3 :

zypper in -t patch sdksp3-xen-201503=10560

SUSE Linux Enterprise Server 11 SP3 :

zypper in -t patch slessp3-xen-201503=10560

SUSE Linux Enterprise Desktop 11 SP3 :

zypper in -t patch sledsp3-xen-201503=10560

To bring your system up-to-date, use 'zypper patch'.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: SuSE Local Security Checks

Nessus Plugin ID: 83720 ()

Bugtraq ID: 72577
72954
72955
73015

CVE ID: CVE-2015-2044
CVE-2015-2045
CVE-2015-2151
CVE-2015-2756

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