SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:1143-1)

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 :

- A malicious 64-bit PV guest may be able to access all of
system memory, allowing for all of privilege escalation,
host crashes, and information leaks by placing a IRET
hypercall in the middle of a multicall batch (XSA-213,
bsc#1034843)

- A malicious pair of guests may be able to access all of
system memory, allowing for all of privilege escalation,
host crashes, and information leaks because of a missing
check when transfering pages via GNTTABOP_transfer
(XSA-214, bsc#1034844).

- CVE-2017-7718: hw/display/cirrus_vga_rop.h allowed local
guest OS privileged users to cause a denial of service
(out-of-bounds read and QEMU process crash) via vectors
related to copying VGA data via the
cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_
functions (bsc#1034994).

- CVE-2016-9603: A privileged user within the guest VM
could have caused a heap overflow in the device model
process, potentially escalating their privileges to that
of the device model process (bsc#1028655) These
non-security issues were fixed :

- bsc#1029827: Additional xenstore patch

- bsc#1036146: Xen VM dumped core to wrong path

- bsc#1022703: Prevent Xen HVM guest with OVMF to hang
with unattached CDRom

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/1022703
https://bugzilla.suse.com/1028655
https://bugzilla.suse.com/1029827
https://bugzilla.suse.com/1030144
https://bugzilla.suse.com/1034843
https://bugzilla.suse.com/1034844
https://bugzilla.suse.com/1034994
https://bugzilla.suse.com/1036146
https://www.suse.com/security/cve/CVE-2016-9603.html
https://www.suse.com/security/cve/CVE-2017-7718.html
http://www.nessus.org/u?cbd538e9

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 12-SP2:zypper in -t
patch SUSE-SLE-SDK-12-SP2-2017-663=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2017-663=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP2-2017-663=1

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

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 1.8
(CVSS2#E:U/RL:ND/RC:C)
Public Exploit Available : false

Family: SuSE Local Security Checks

Nessus Plugin ID: 99959 ()

Bugtraq ID:

CVE ID: CVE-2016-9603
CVE-2017-7718

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