SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2369-1) (Foreshadow)

high Nessus Plugin ID 111836

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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 the Linux Kernel 3.12.61-52_136 fixes several issues.
The following security issues were fixed :

- CVE-2018-3646: Local attackers in virtualized guest systems could use speculative code patterns on hyperthreaded processors to read data present in the L1 Datacache used by other hyperthreads on the same CPU core, potentially leaking sensitive data, even from other virtual machines or the host system (bsc#1099306).

- CVE-2018-10853: A flaw was found in kvm. In which certain instructions such as sgdt/sidt call segmented_write_std didn't propagate access correctly.
As such, during userspace induced exception, the guest can incorrectly assume that the exception happened in the kernel and panic. (bsc#1097108).

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 the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-2018-1587=1

See Also

https://www.suse.com/security/cve/CVE-2018-3646/

https://bugzilla.suse.com/show_bug.cgi?id=1097108

https://bugzilla.suse.com/show_bug.cgi?id=1099306

https://www.suse.com/security/cve/CVE-2018-10853/

http://www.nessus.org/u?2926cc20

Plugin Details

Severity: High

ID: 111836

File Name: suse_SU-2018-2369-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/17/2018

Updated: 9/10/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.7

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

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: cpe:2.3:o:novell:suse_linux:12:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:kgraft-patch-3_12_61-52_136-default:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:suse_linux:kgraft-patch-3_12_61-52_136-xen:*:*:*:*:*:*:*

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

Patch Publication Date: 8/16/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-3646, CVE-2018-10853