SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:0571-1)

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-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the
bitblit copy routine cirrus_bitblt_cputovideo failed to
check the memory region, allowing for an out-of-bounds
write that allows for privilege escalation
(bsc#1024834).

- CVE-2017-2615: An error in the bitblt copy operation
could have allowed a malicious guest administrator to
cause an out of bounds memory access, possibly leading
to information disclosure or privilege escalation
(bsc#1023004).

- A malicious guest could have, by frequently rebooting
over extended periods of time, run the host system out
of memory, resulting in a Denial of Service (DoS)
(bsc#1022871)

- CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support
was vulnerable to a divide by zero issue while copying
VGA data. A privileged user inside guest could have used
this flaw to crash the process instance on the host,
resulting in DoS (bsc#1015169 These non-security issues
were fixed :

- bsc#1000195: Prevent panic on CPU0 while booting on SLES
11 SP3

- bsc#1002496: Added support for reloading clvm in
block-dmmd block-dmmd

- bsc#1005028: Fixed building Xen RPMs from Sources

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/1000195
https://bugzilla.suse.com/1002496
https://bugzilla.suse.com/1005028
https://bugzilla.suse.com/1012651
https://bugzilla.suse.com/1014298
https://bugzilla.suse.com/1014300
https://bugzilla.suse.com/1015169
https://bugzilla.suse.com/1016340
https://bugzilla.suse.com/1022871
https://bugzilla.suse.com/1023004
https://bugzilla.suse.com/1024834
https://www.suse.com/security/cve/CVE-2016-9921.html
https://www.suse.com/security/cve/CVE-2016-9922.html
https://www.suse.com/security/cve/CVE-2017-2615.html
https://www.suse.com/security/cve/CVE-2017-2620.html
http://www.nessus.org/u?809c2262

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-SP2-2017-296=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2017-296=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP2-2017-296=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 : 1.9
(CVSS2#E:POC/RL:U/RC:ND)
Public Exploit Available : true

Family: SuSE Local Security Checks

Nessus Plugin ID: 97433 ()

Bugtraq ID:

CVE ID: CVE-2016-9921
CVE-2016-9922
CVE-2017-2615
CVE-2017-2620

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now