SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3507-1)

high Nessus Plugin ID 143856
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

The SUSE Linux Enterprise 15 SP1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2020-25705: A flaw in the way reply ICMP packets are limited in was found that allowed to quickly scan open UDP ports. This flaw allowed an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software and services that rely on UDP source port randomization (like DNS) are indirectly affected as well. Kernel versions may be vulnerable to this issue (bsc#1175721, bsc#1178782).

CVE-2020-25704: Fixed a memory leak in perf_event_parse_addr_filter() (bsc#1178393).

CVE-2020-25668: Fixed a use-after-free in con_font_op() (bnc#1178123).

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 Workstation Extension 15-SP1 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Live Patching 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Legacy Software 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Legacy-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Development Tools 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-3507=1

SUSE Linux Enterprise High Availability 15-SP1 :

zypper in -t patch SUSE-SLE-Product-HA-15-SP1-2020-3507=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1058115

https://bugzilla.suse.com/show_bug.cgi?id=1163592

https://bugzilla.suse.com/show_bug.cgi?id=1167030

https://bugzilla.suse.com/show_bug.cgi?id=1172873

https://bugzilla.suse.com/show_bug.cgi?id=1175306

https://bugzilla.suse.com/show_bug.cgi?id=1175721

https://bugzilla.suse.com/show_bug.cgi?id=1176855

https://bugzilla.suse.com/show_bug.cgi?id=1176907

https://bugzilla.suse.com/show_bug.cgi?id=1176983

https://bugzilla.suse.com/show_bug.cgi?id=1177703

https://bugzilla.suse.com/show_bug.cgi?id=1177819

https://bugzilla.suse.com/show_bug.cgi?id=1177820

https://bugzilla.suse.com/show_bug.cgi?id=1178123

https://bugzilla.suse.com/show_bug.cgi?id=1178393

https://bugzilla.suse.com/show_bug.cgi?id=1178589

https://bugzilla.suse.com/show_bug.cgi?id=1178622

https://bugzilla.suse.com/show_bug.cgi?id=1178686

https://bugzilla.suse.com/show_bug.cgi?id=1178765

https://bugzilla.suse.com/show_bug.cgi?id=1178782

https://bugzilla.suse.com/show_bug.cgi?id=927455

https://www.suse.com/security/cve/CVE-2020-25668/

https://www.suse.com/security/cve/CVE-2020-25704/

https://www.suse.com/security/cve/CVE-2020-25705/

http://www.nessus.org/u?0d76aaec

Plugin Details

Severity: High

ID: 143856

File Name: suse_SU-2020-3507-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 12/9/2020

Updated: 6/8/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-25668

VPR

Risk Factor: High

Score: 7.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

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

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

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

Temporal Vector: E:U/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-devel-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-obs-build, p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debuginfo, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debugsource, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default-debuginfo, cpe:/o:novell:suse_linux:15

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/24/2020

Vulnerability Publication Date: 11/17/2020

Reference Information

CVE: CVE-2020-25668, CVE-2020-25704, CVE-2020-25705