SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0645-1)

high Nessus Plugin ID 122969
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_125 fixes several issues.

The following security issues were fixed :

CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bsc#1128378).

CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124734).

CVE-2018-5391: The Linux kernel was vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker might have caused a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size (bsc#1103098).

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-12-2019-645=1 SUSE-SLE-SERVER-12-2019-646=1 SUSE-SLE-SERVER-12-2019-647=1 SUSE-SLE-SERVER-12-2019-648=1 SUSE-SLE-SERVER-12-2019-649=1 SUSE-SLE-SERVER-12-2019-650=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1103098

https://bugzilla.suse.com/show_bug.cgi?id=1124734

https://bugzilla.suse.com/show_bug.cgi?id=1128378

https://www.suse.com/security/cve/CVE-2018-5391/

https://www.suse.com/security/cve/CVE-2019-7221/

https://www.suse.com/security/cve/CVE-2019-9213/

http://www.nessus.org/u?b61941ab

Plugin Details

Severity: High

ID: 122969

File Name: suse_SU-2019-0645-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/20/2019

Updated: 2/3/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-7221

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.8

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

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

Temporal Vector: E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_125-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_125-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_128-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_128-xen, 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, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_136-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_136-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_141-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_141-xen, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_146-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_61-52_146-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: 3/19/2019

Vulnerability Publication Date: 9/6/2018

Exploitable With

Metasploit (Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation)

Reference Information

CVE: CVE-2018-5391, CVE-2019-7221, CVE-2019-9213