SUSE SLES12 Security Update : kernel (SUSE-SU-2018:1374-1) (Spectre)

High Nessus Plugin ID 110039

Synopsis

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

Description

The SUSE Linux Enterprise 12 GA LTSS kernel was updated to receive several security fixes. The following security bugs were fixed :

- CVE-2018-3639: Information leaks using 'Memory Disambiguation' feature in modern CPUs were mitigated, aka 'Spectre Variant 4' (bnc#1087082). A new boot commandline option was introduced, 'spec_store_bypass_disable', which can have following values :

- auto: Kernel detects whether your CPU model contains an implementation of Speculative Store Bypass and picks the most appropriate mitigation.

- on: disable Speculative Store Bypass

- off: enable Speculative Store Bypass

- prctl: Control Speculative Store Bypass per thread via prctl. Speculative Store Bypass is enabled for a process by default. The state of the control is inherited on fork.

- seccomp: Same as 'prctl' above, but all seccomp threads will disable SSB unless they explicitly opt out. The default is 'seccomp', meaning programs need explicit opt-in into the mitigation. Status can be queried via the /sys/devices/system/cpu/vulnerabilities/spec_store_bypas s file, containing :

- 'Vulnerable'

- 'Mitigation: Speculative Store Bypass disabled'

- 'Mitigation: Speculative Store Bypass disabled via prctl'

- 'Mitigation: Speculative Store Bypass disabled via prctl and seccomp'

- CVE-2018-1000199: An address corruption flaw was discovered while modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an unprivileged user/process could use this flaw to crash the system kernel resulting in DoS OR to potentially escalate privileges on a the system. (bsc#1089895)

- CVE-2018-10675: The do_get_mempolicy function in mm/mempolicy.c allowed local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted system calls (bnc#1091755).

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 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-12-2018-959=1

SUSE Linux Enterprise Module for Public Cloud 12:zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2018-959=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1087082

https://bugzilla.suse.com/show_bug.cgi?id=1087845

https://bugzilla.suse.com/show_bug.cgi?id=1089895

https://bugzilla.suse.com/show_bug.cgi?id=1091755

https://bugzilla.suse.com/show_bug.cgi?id=1092497

https://bugzilla.suse.com/show_bug.cgi?id=1093215

https://bugzilla.suse.com/show_bug.cgi?id=1094019

https://bugzilla.suse.com/show_bug.cgi?id=985025

https://www.suse.com/security/cve/CVE-2018-1000199/

https://www.suse.com/security/cve/CVE-2018-10675/

https://www.suse.com/security/cve/CVE-2018-3639/

http://www.nessus.org/u?17d3afde

Plugin Details

Severity: High

ID: 110039

File Name: suse_SU-2018-1374-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 2018/05/23

Updated: 2019/04/05

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 7.8

Temporal Score: 7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debugsource, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-xen, p-cpe:/a:novell:suse_linux:kernel-xen-base, p-cpe:/a:novell:suse_linux:kernel-xen-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-xen-debuginfo, p-cpe:/a:novell:suse_linux:kernel-xen-debugsource, p-cpe:/a:novell:suse_linux:kernel-xen-devel, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_133-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_133-xen, cpe:/o:novell:suse_linux:12

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/05/22

Reference Information

CVE: CVE-2018-1000199, CVE-2018-10675, CVE-2018-3639