SUSE SLES12 Security Update : xen (SUSE-SU-2017:1795-1)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

This update for xen fixes several issues. These security issues were
fixed :

- CVE-2017-9503: The MegaRAID SAS 8708EM2 Host Bus Adapter
emulation support was vulnerable to a NULL pointer
dereference issue which allowed a privileged user inside
guest to crash the Qemu process on the host resulting in
DoS (bsc#1043297)

- CVE-2017-9374: Missing free of 's->ipacket', causes a
host memory leak, allowing for DoS (bsc#1043074)

- CVE-2017-10911: blkif responses leaked backend stack
data, which allowed unprivileged guest to obtain
sensitive information from the host or other guests
(XSA-216, bsc#1042863)

- CVE-2017-10912: Page transfer might have allowed PV
guest to elevate privilege (XSA-217, bsc#1042882)

- CVE-2017-10913, CVE-2017-10914: Races in the grant table
unmap code allowed for informations leaks and
potentially privilege escalation (XSA-218, bsc#1042893)

- CVE-2017-10915: Insufficient reference counts during
shadow emulation allowed a malicious pair of guest to
elevate their privileges to the privileges that XEN runs
under (XSA-219, bsc#1042915)

- CVE-2017-10917: Missing NULL pointer check in event
channel poll allows guests to DoS the host (XSA-221,
bsc#1042924)

- CVE-2017-10918: Stale P2M mappings due to insufficient
error checking allowed malicious guest to leak
information or elevate privileges (XSA-222, bsc#1042931)

- CVE-2017-10920, CVE-2017-10921, CVE-2017-10922: Grant
table operations mishandled reference counts allowing
malicious guests to escape (XSA-224, bsc#1042938)

- CVE-2017-9330: USB OHCI Emulation in qemu allowed local
guest OS users to cause a denial of service (infinite
loop) by leveraging an incorrect return value
(bsc#1042160)

- CVE-2017-8309: Memory leak in the audio/audio.c allowed
remote attackers to cause a denial of service (memory
consumption) by repeatedly starting and stopping audio
capture (bsc#1037243)

- CVE-2017-8112: hw/scsi/vmw_pvscsi.c allowed local guest
OS privileged users to cause a denial of service
(infinite loop and CPU consumption) via the message ring
page count (bsc#1036470)

- CVE-2017-8905: Xen a failsafe callback, which might have
allowed PV guest OS users to execute arbitrary code on
the host OS (XSA-215, bsc#1034845). These non-security
issues were fixed :

- bsc#1031460: Fixed DomU Live Migration

- bsc#1014136: Fixed kdump SLES12-SP2

- bsc#1026236: Equalized paravirtualized vs. fully
virtualized migration speed

- bsc#1032148: Ensure that time doesn't goes backwards
during live migration of HVM domU

- bsc#1027519: Included various upstream patches

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 :

https://bugzilla.suse.com/1014136
https://bugzilla.suse.com/1026236
https://bugzilla.suse.com/1027519
https://bugzilla.suse.com/1031460
https://bugzilla.suse.com/1032148
https://bugzilla.suse.com/1034845
https://bugzilla.suse.com/1036470
https://bugzilla.suse.com/1037243
https://bugzilla.suse.com/1042160
https://bugzilla.suse.com/1042863
https://bugzilla.suse.com/1042882
https://bugzilla.suse.com/1042893
https://bugzilla.suse.com/1042915
https://bugzilla.suse.com/1042924
https://bugzilla.suse.com/1042931
https://bugzilla.suse.com/1042938
https://bugzilla.suse.com/1043074
https://bugzilla.suse.com/1043297
https://www.suse.com/security/cve/CVE-2017-10911.html
https://www.suse.com/security/cve/CVE-2017-10912.html
https://www.suse.com/security/cve/CVE-2017-10913.html
https://www.suse.com/security/cve/CVE-2017-10914.html
https://www.suse.com/security/cve/CVE-2017-10915.html
https://www.suse.com/security/cve/CVE-2017-10917.html
https://www.suse.com/security/cve/CVE-2017-10918.html
https://www.suse.com/security/cve/CVE-2017-10920.html
https://www.suse.com/security/cve/CVE-2017-10921.html
https://www.suse.com/security/cve/CVE-2017-10922.html
https://www.suse.com/security/cve/CVE-2017-8112.html
https://www.suse.com/security/cve/CVE-2017-8309.html
https://www.suse.com/security/cve/CVE-2017-8905.html
https://www.suse.com/security/cve/CVE-2017-9330.html
https://www.suse.com/security/cve/CVE-2017-9374.html
https://www.suse.com/security/cve/CVE-2017-9503.html
http://www.nessus.org/u?4366baed

Solution :

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

SUSE Linux Enterprise Server for SAP 12:zypper in -t patch
SUSE-SLE-SAP-12-2017-1118=1

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2017-1118=1

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

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

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