SUSE SLES12 Security Update : kernel (SUSE-SU-2018:2416-1) (Foreshadow)

Medium Nessus Plugin ID 112016

Synopsis

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

Description

This update for the Linux Kernel 4.4.114-94_14 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-2017-18344: The timer_create syscall implementation in kernel/time/posix-timers.c didn't properly validate the sigevent->sigev_notify field, which lead to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allowed userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE) (bsc#1103203). before 4.14.8

- 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 for SAP 12-SP2:zypper in -t patch SUSE-SLE-SAP-12-SP2-2018-1667=1 SUSE-SLE-SAP-12-SP2-2018-1668=1

SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-1667=1 SUSE-SLE-SERVER-12-SP2-2018-1668=1

SUSE Linux Enterprise Live Patching 12-SP3:zypper in -t patch SUSE-SLE-Live-Patching-12-SP3-2018-1672=1 SUSE-SLE-Live-Patching-12-SP3-2018-1673=1 SUSE-SLE-Live-Patching-12-SP3-2018-1674=1 SUSE-SLE-Live-Patching-12-SP3-2018-1675=1 SUSE-SLE-Live-Patching-12-SP3-2018-1676=1 SUSE-SLE-Live-Patching-12-SP3-2018-1677=1

See Also

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

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

https://bugzilla.suse.com/show_bug.cgi?id=1103203

https://www.suse.com/security/cve/CVE-2017-18344/

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

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

http://www.nessus.org/u?8f059202

Plugin Details

Severity: Medium

ID: 112016

File Name: suse_SU-2018-2416-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2018/08/20

Updated: 2018/12/01

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.7

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

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-4_4_103-92_53-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_103-92_56-default, cpe:/o:novell:suse_linux:12

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/08/17

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-18344, CVE-2018-10853, CVE-2018-3646