SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2473-1) (Bunker Buster)

High Nessus Plugin ID 93935

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-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785).

- CVE-2016-7093: Xen allowed local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation (bsc#995789).

- CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792).

- CVE-2016-6836: Information leakage in vmxnet3_complete_packet (bsc#994761).

- CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3 device driver. Aprivileged user inside guest c... (bsc#994772).

- CVE-2016-6833: Use after free while writing (bsc#994775).

- CVE-2016-6835: Buffer overflow in vmxnet_tx_pkt_parse_headers() in vmxnet3 deviceemulation. (bsc#994625).

- CVE-2016-6834: An infinite loop during packet fragmentation (bsc#994421).

- CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675).

- CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allowed local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check (bsc#988676).

The update package also includes non-security fixes. See advisory for details.

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.

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-SP1:zypper in -t patch SUSE-SLE-SDK-12-SP1-2016-1444=1

SUSE Linux Enterprise Server 12-SP1:zypper in -t patch SUSE-SLE-SERVER-12-SP1-2016-1444=1

SUSE Linux Enterprise Desktop 12-SP1:zypper in -t patch SUSE-SLE-DESKTOP-12-SP1-2016-1444=1

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

See Also

https://bugzilla.suse.com/show_bug.cgi?id=953518

https://bugzilla.suse.com/show_bug.cgi?id=955104

https://bugzilla.suse.com/show_bug.cgi?id=959330

https://bugzilla.suse.com/show_bug.cgi?id=959552

https://bugzilla.suse.com/show_bug.cgi?id=970135

https://bugzilla.suse.com/show_bug.cgi?id=971949

https://bugzilla.suse.com/show_bug.cgi?id=988675

https://bugzilla.suse.com/show_bug.cgi?id=988676

https://bugzilla.suse.com/show_bug.cgi?id=990500

https://bugzilla.suse.com/show_bug.cgi?id=990970

https://bugzilla.suse.com/show_bug.cgi?id=991934

https://bugzilla.suse.com/show_bug.cgi?id=992224

https://bugzilla.suse.com/show_bug.cgi?id=993665

https://bugzilla.suse.com/show_bug.cgi?id=994421

https://bugzilla.suse.com/show_bug.cgi?id=994625

https://bugzilla.suse.com/show_bug.cgi?id=994761

https://bugzilla.suse.com/show_bug.cgi?id=994772

https://bugzilla.suse.com/show_bug.cgi?id=994775

https://bugzilla.suse.com/show_bug.cgi?id=995785

https://bugzilla.suse.com/show_bug.cgi?id=995789

https://bugzilla.suse.com/show_bug.cgi?id=995792

https://www.suse.com/security/cve/CVE-2016-6258/

https://www.suse.com/security/cve/CVE-2016-6259/

https://www.suse.com/security/cve/CVE-2016-6833/

https://www.suse.com/security/cve/CVE-2016-6834/

https://www.suse.com/security/cve/CVE-2016-6835/

https://www.suse.com/security/cve/CVE-2016-6836/

https://www.suse.com/security/cve/CVE-2016-6888/

https://www.suse.com/security/cve/CVE-2016-7092/

https://www.suse.com/security/cve/CVE-2016-7093/

https://www.suse.com/security/cve/CVE-2016-7094/

http://www.nessus.org/u?bb6c4300

Plugin Details

Severity: High

ID: 93935

File Name: suse_SU-2016-2473-1.nasl

Version: 2.15

Type: local

Agent: unix

Published: 2016/10/10

Updated: 2019/09/11

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-debugsource, p-cpe:/a:novell:suse_linux:xen-doc-html, p-cpe:/a:novell:suse_linux:xen-kmp-default, p-cpe:/a:novell:suse_linux:xen-kmp-default-debuginfo, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-libs-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools-domU, p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo, cpe:/o:novell:suse_linux:12

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/10/07

Vulnerability Publication Date: 2016/08/02

Reference Information

CVE: CVE-2016-6258, CVE-2016-6259, CVE-2016-6833, CVE-2016-6834, CVE-2016-6835, CVE-2016-6836, CVE-2016-6888, CVE-2016-7092, CVE-2016-7093, CVE-2016-7094

IAVB: 2016-B-0118, 2016-B-0140