SUSE SLES11 Security Update : xen (SUSE-SU-2016:2507-1) (Bunker Buster)

high Nessus Plugin ID 94038
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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-2016-7154: Use-after-free vulnerability in the FIFO event channel code in Xen allowed local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number (bsc#997731)

- CVE-2016-6836: VMWARE VMXNET3 NIC device allowed privileged user inside the guest to leak information. It occured while processing transmit(tx) queue, when it reaches the end of packet (bsc#994761)

- CVE-2016-6888: A integer overflow int the VMWARE VMXNET3 NIC device support, during the initialisation of new packets in the device, could have allowed a privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994772)

- CVE-2016-6833: A use-after-free issue in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994775)

- CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625)

- CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (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)

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 11-SP4:zypper in -t patch sdksp4-xen-12782=1

SUSE Linux Enterprise Server 11-SP4:zypper in -t patch slessp4-xen-12782=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch dbgsp4-xen-12782=1

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

See Also

https://bugzilla.suse.com/show_bug.cgi?id=966467

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=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=993507

https://bugzilla.suse.com/show_bug.cgi?id=994136

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://bugzilla.suse.com/show_bug.cgi?id=997731

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

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/

https://www.suse.com/security/cve/CVE-2016-7154/

http://www.nessus.org/u?181aa488

Plugin Details

Severity: High

ID: 94038

File Name: suse_SU-2016-2507-1.nasl

Version: 2.17

Type: local

Agent: unix

Published: 10/13/2016

Updated: 1/19/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: High

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: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, 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-pae, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-domU, cpe:/o:novell:suse_linux:11

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2016

Vulnerability Publication Date: 8/2/2016

Reference Information

CVE: CVE-2016-6258, CVE-2016-6833, CVE-2016-6834, CVE-2016-6835, CVE-2016-6836, CVE-2016-6888, CVE-2016-7092, CVE-2016-7093, CVE-2016-7094, CVE-2016-7154

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