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Amazon Linux 2 : libtasn1 (ALAS-2023-1908)

critical Nessus Plugin ID 170436

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of libtasn1 installed on the remote host is prior to 4.10-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-1908 advisory.

 - GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der. (CVE-2021-46848)

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

Solution

Run 'yum update libtasn1' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2023-1908.html

https://alas.aws.amazon.com/cve/html/CVE-2021-46848.html

Plugin Details

Severity: Critical

ID: 170436

File Name: al2_ALAS-2023-1908.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/23/2023

Updated: 9/6/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2021-46848

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libtasn1, p-cpe:/a:amazon:linux:libtasn1-debuginfo, p-cpe:/a:amazon:linux:libtasn1-devel, p-cpe:/a:amazon:linux:libtasn1-tools, cpe:/o:amazon:linux:2

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/18/2023

Vulnerability Publication Date: 10/24/2022

Reference Information

CVE: CVE-2021-46848