SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0683-1)

medium Nessus Plugin ID 123061
New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it is different from CVSS.

VPR Score: 6.7

Synopsis

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

Description

This update for the Linux Kernel 4.4.121-92_73 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-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bsc#1124729).

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-SP2-2019-682=1 SUSE-SLE-SAP-12-SP2-2019-683=1 SUSE-SLE-SAP-12-SP2-2019-684=1 SUSE-SLE-SAP-12-SP2-2019-685=1

SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-682=1 SUSE-SLE-SERVER-12-SP2-2019-683=1 SUSE-SLE-SERVER-12-SP2-2019-684=1 SUSE-SLE-SERVER-12-SP2-2019-685=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1124729

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-2019-6974/

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

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

http://www.nessus.org/u?67a28800

Plugin Details

Severity: Medium

ID: 123061

File Name: suse_SU-2019-0683-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 3/25/2019

Updated: 2/3/2020

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 6.7

CVSS v2.0

Base Score: 6.8

Temporal Score: 5.6

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

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

CVSS v3.0

Base Score: 8.1

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/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-4_4_120-92_70-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_73-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_80-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_85-default, 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: 3/21/2019

Vulnerability Publication Date: 2/15/2019

Exploitable With

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

Reference Information

CVE: CVE-2019-6974, CVE-2019-7221, CVE-2019-9213