SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2015:0923-1) (Venom)

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


Synopsis :

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

Description :

XEN was updated to fix two security issues and bugs.

Security issues fixed :

- CVE-2015-3340: Xen did not initialize certain fields,
which allowed certain remote service domains to obtain
sensitive information from memory via a (1)
XEN_DOMCTL_gettscinfo or (2)
XEN_SYSCTL_getdomaininfolist request.

- CVE-2015-2751: Xen, when using toolstack disaggregation,
allowed remote domains with partial management control
to cause a denial of service (host lock) via unspecified
domctl operations.

- CVE-2015-2752: The XEN_DOMCTL_memory_mapping hypercall
in Xen, when using a PCI passthrough device, was not
preemptable, which allowed local x86 HVM domain users to
cause a denial of service (host CPU consumption) via a
crafted request to the device model (qemu-dm).

- CVE-2015-3456: Fixed a buffer overflow in the floppy
drive emulation, which could be used to denial of
service attacks or potential code execution against the
host.

Bugs fixed :

- xentop: Fix memory leak on read failure

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/922705
https://bugzilla.suse.com/922709
https://bugzilla.suse.com/927967
https://bugzilla.suse.com/929339
https://www.suse.com/security/cve/CVE-2015-2751.html
https://www.suse.com/security/cve/CVE-2015-2752.html
https://www.suse.com/security/cve/CVE-2015-3340.html
https://www.suse.com/security/cve/CVE-2015-3456.html
http://www.nessus.org/u?bbe2b7e6

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 :

zypper in -t patch SUSE-SLE-SDK-12-2015-206=1

SUSE Linux Enterprise Server 12 :

zypper in -t patch SUSE-SLE-SERVER-12-2015-206=1

SUSE Linux Enterprise Desktop 12 :

zypper in -t patch SUSE-SLE-DESKTOP-12-2015-206=1

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

Risk factor :

High / CVSS Base Score : 7.7
(CVSS2#AV:A/AC:L/Au:S/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:POC/RL:OF/RC:ND)
Public Exploit Available : true

Family: SuSE Local Security Checks

Nessus Plugin ID: 83757 ()

Bugtraq ID: 73443
73448
74248
74640

CVE ID: CVE-2015-2751
CVE-2015-2752
CVE-2015-3340
CVE-2015-3456

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