SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2347-1) (Foreshadow)

Medium Nessus Plugin ID 111818

Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for the Linux Kernel 3.12.61-52_106 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-2017-11600: net/xfrm/xfrm_policy.c did not ensure that the dir value of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allowed local users to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink message (bsc#1096564)

- 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-12-2018-1591=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1096564

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-2017-11600/

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

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

http://www.nessus.org/u?0b42a76a

Plugin Details

Severity: Medium

ID: 111818

File Name: suse_SU-2018-2347-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/08/17

Updated: 2019/09/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.9

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

CVSS v3.0

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: p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_106-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_106-xen, cpe:/o:novell:suse_linux:12

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

Patch Publication Date: 2018/08/16

Vulnerability Publication Date: 2017/07/24

Reference Information

CVE: CVE-2017-11600, CVE-2018-10853, CVE-2018-3646