SUSE SLES11 Security Update : kvm (SUSE-SU-2017:1135-1)

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 kvm 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#1024972)

- 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)

- CVE-2016-9776: The ColdFire Fast Ethernet Controller
emulator support was vulnerable to an infinite loop
issue while receiving packets in 'mcf_fec_receive'. A
privileged user/process inside guest could have used
this issue to crash the Qemu process on the host leading
to DoS (bsc#1013285)

- CVE-2016-9911: The USB EHCI Emulation support was
vulnerable to a memory leakage issue while processing
packet data in 'ehci_init_transfer'. A guest
user/process could have used this issue to leak host
memory, resulting in DoS for the host (bsc#1014111)

- CVE-2016-9907: The USB redirector usb-guest support was
vulnerable to a memory leakage flaw when destroying the
USB redirector in 'usbredir_handle_destroy'. A guest
user/process could have used this issue to leak host
memory, resulting in DoS for a host (bsc#1014109)

- 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#1014702)

- CVE-2016-9922: 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#1014702)

- CVE-2017-5898: The CCID Card device emulator support was
vulnerable to an integer overflow allowing a privileged
user inside the guest to crash the Qemu process
resulting in DoS (bnc#1023907)

- CVE-2016-10155: The virtual hardware watchdog
'wdt_i6300esb' was vulnerable to a memory leakage issue
allowing a privileged user to cause a DoS and/or
potentially crash the Qemu process on the host
(bsc#1021129)

- CVE-2017-5856: The MegaRAID SAS 8708EM2 Host Bus Adapter
emulation support was vulnerable to a memory leakage
issue allowing a privileged user to leak host memory
resulting in DoS (bsc#1023053) These non-security issues
were fixed :

- Fixed various inaccuracies in cirrus vga device
emulation

- Fixed virtio interface failure (bsc#1015048)

- Fixed graphical update errors introduced by previous
security fix (bsc#1016779)

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/1013285
https://bugzilla.suse.com/1014109
https://bugzilla.suse.com/1014111
https://bugzilla.suse.com/1014702
https://bugzilla.suse.com/1015048
https://bugzilla.suse.com/1015169
https://bugzilla.suse.com/1016779
https://bugzilla.suse.com/1021129
https://bugzilla.suse.com/1023004
https://bugzilla.suse.com/1023053
https://bugzilla.suse.com/1023907
https://bugzilla.suse.com/1024972
https://www.suse.com/security/cve/CVE-2016-10155.html
https://www.suse.com/security/cve/CVE-2016-9776.html
https://www.suse.com/security/cve/CVE-2016-9907.html
https://www.suse.com/security/cve/CVE-2016-9911.html
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
https://www.suse.com/security/cve/CVE-2017-5856.html
https://www.suse.com/security/cve/CVE-2017-5898.html
http://www.nessus.org/u?1f7f12a2

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 11-SP4:zypper in -t patch
slessp4-kvm-13080=1

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

Risk factor :

Medium / CVSS Base Score : 4.9
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 4.4
(CVSS2#E:POC/RL:U/RC:ND)
Public Exploit Available : true

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