SUSE SLES12 Security Update : xen (SUSE-SU-2017:1148-1)

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-2017-7980: An out-of-bounds r/w access issues in the
Cirrus CLGD 54xx VGA Emulator support allowed privileged
user inside guest to use this flaw to crash the Qemu
process resulting in DoS or potentially execute
arbitrary code on a host with privileges of Qemu process
on the host (bsc#1035483).

- 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,

- 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).

- Incorrect checks when handling exceptions allowed a
malicious or buggy 64-bit PV guest to modify part of a
physical memory page not belonging to it, potentially
allowing for all of privilege escalation, host or other
guest crashes, and information leaks (XSA-215,

- 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). This non-security issue was
fixed :

- bsc#1029827: Additional xenstore fixes

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 :

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 Linux Enterprise Server 12-LTSS:zypper in -t patch

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

Risk factor :

Medium / CVSS Base Score : 4.6
CVSS Temporal Score : 3.4
Public Exploit Available : false

Family: SuSE Local Security Checks

Nessus Plugin ID: 99963 ()

Bugtraq ID:

CVE ID: CVE-2017-7718

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