SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2420-1)

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-2017-14316: Missing bound check in function
`alloc_heap_pages` for an internal array allowed
attackers using crafted hypercalls to execute arbitrary
code within Xen (XSA-231, bsc#1056278)

- CVE-2017-14318: The function __gnttab_cache_flush missed
a check for grant tables, allowing a malicious guest to
crash the host or for x86 PV guests to potentially
escalate privileges (XSA-232, bsc#1056280)

- CVE-2017-14317: A race in cxenstored may have cause a
double-free allowind for DoS of the xenstored daemon
(XSA-233, bsc#1056281).

- CVE-2017-14319: An error while handling grant mappings
allowed malicious or buggy x86 PV guest to escalate its
privileges or crash the hypervisor (XSA-234,
bsc#1056282). These non-security issues were fixed :

- bsc#1057358: Fixed boot into SUSE Linux Enterprise 12.3
with secure boot

- bsc#1055695: Fixed restoring updates for HVM guests for
ballooned domUs

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/1027519
https://bugzilla.suse.com/1055695
https://bugzilla.suse.com/1056278
https://bugzilla.suse.com/1056280
https://bugzilla.suse.com/1056281
https://bugzilla.suse.com/1056282
https://bugzilla.suse.com/1057358
https://www.suse.com/security/cve/CVE-2017-14316.html
https://www.suse.com/security/cve/CVE-2017-14317.html
https://www.suse.com/security/cve/CVE-2017-14318.html
https://www.suse.com/security/cve/CVE-2017-14319.html
http://www.nessus.org/u?814f5e53

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-SP3:zypper in -t
patch SUSE-SLE-SDK-12-SP3-2017-1500=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2017-1500=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2017-1500=1

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

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: SuSE Local Security Checks

Nessus Plugin ID: 103177 ()

Bugtraq ID:

CVE ID: CVE-2017-14316
CVE-2017-14317
CVE-2017-14318
CVE-2017-14319

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