SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2326-1)

critical Nessus Plugin ID 102952
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 to version 4.7.3 fixes several issues. These security issues were fixed :

- CVE-2017-12135: Unbounded recursion in grant table code allowed a malicious guest to crash the host or potentially escalate privileges/leak information (XSA-226, bsc#1051787).

- CVE-2017-12137: Incorrectly-aligned updates to pagetables allowed for privilege escalation (XSA-227, bsc#1051788).

- CVE-2017-12136: Race conditions with maptrack free list handling allows a malicious guest administrator to crash the host or escalate their privilege to that of the host (XSA-228, bsc#1051789).

- CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local guest OS users to cause a denial of service (out-of-bounds read) via a crafted DHCP options string (bsc#1049578).

- CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote attackers to cause a denial of service (daemon crash) by disconnecting during a server-to-client reply attempt (bsc#1046637).

- CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to potentially leaking sensitive information (XSA-230 CVE-2017-12855).

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-SP2:zypper in -t patch SUSE-SLE-SDK-12-SP2-2017-1438=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-1438=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch SUSE-SLE-DESKTOP-12-SP2-2017-1438=1

SUSE Container as a Service Platform ALL:zypper in -t patch SUSE-CAASP-ALL-2017-1438=1

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

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1002573

https://bugzilla.suse.com/show_bug.cgi?id=1026236

https://bugzilla.suse.com/show_bug.cgi?id=1035231

https://bugzilla.suse.com/show_bug.cgi?id=1037840

https://bugzilla.suse.com/show_bug.cgi?id=1046637

https://bugzilla.suse.com/show_bug.cgi?id=1049578

https://bugzilla.suse.com/show_bug.cgi?id=1051787

https://bugzilla.suse.com/show_bug.cgi?id=1051788

https://bugzilla.suse.com/show_bug.cgi?id=1051789

https://bugzilla.suse.com/show_bug.cgi?id=1052686

https://bugzilla.suse.com/show_bug.cgi?id=1055695

https://www.suse.com/security/cve/CVE-2016-9603/

https://www.suse.com/security/cve/CVE-2017-10664/

https://www.suse.com/security/cve/CVE-2017-11434/

https://www.suse.com/security/cve/CVE-2017-12135/

https://www.suse.com/security/cve/CVE-2017-12136/

https://www.suse.com/security/cve/CVE-2017-12137/

https://www.suse.com/security/cve/CVE-2017-12855/

http://www.nessus.org/u?281dfc3b

Plugin Details

Severity: Critical

ID: 102952

File Name: suse_SU-2017-2326-1.nasl

Version: 3.10

Type: local

Agent: unix

Published: 9/5/2017

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.6

Vector: CVSS:3.0/AV:N/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-debugsource, p-cpe:/a:novell:suse_linux:xen-doc-html, 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 Ease: No known exploits are available

Patch Publication Date: 9/1/2017

Vulnerability Publication Date: 7/25/2017

Reference Information

CVE: CVE-2016-9603, CVE-2017-10664, CVE-2017-11434, CVE-2017-12135, CVE-2017-12136, CVE-2017-12137, CVE-2017-12855