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SUSE SLES15 Security Update : kernel (Live Patch 20 for SLE 15 SP2) (SUSE-SU-2021:4075-1)

high Nessus Plugin ID 156095

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2021:4075-1 advisory.

 - A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. (CVE-2021-20322)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel-livepatch-5_3_18-24_86-default and / or kernel-livepatch-5_3_18-59_34-default packages.

See Also

https://bugzilla.suse.com/1191813

https://www.suse.com/security/cve/CVE-2021-20322

http://www.nessus.org/u?9c735cbf

Plugin Details

Severity: High

ID: 156095

File Name: suse_SU-2021-4075-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 12/15/2021

Updated: 7/13/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2021-20322

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-livepatch-5_3_18-24_86-default, p-cpe:/a:novell:suse_linux:kernel-livepatch-5_3_18-59_34-default, 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: 12/14/2021

Vulnerability Publication Date: 1/20/2022

Reference Information

CVE: CVE-2021-20322

SuSE: SUSE-SU-2021:4075-1