Detections
Analytics

Amazon Linux AMI : libgcrypt (ALAS-2022-1578)

critical Nessus Plugin ID 159563

Language:

Synopsis

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

Description

The version of libgcrypt installed on the remote host is prior to 1.5.3-12.20. It is, therefore, affected by a vulnerability as referenced in the ALAS-2022-1578 advisory.

 A side-channel attack flaw was found in the way libgcrypt implemented Elgamal encryption. This flaw allows an attacker to decrypt parts of ciphertext encrypted using Elgamal, for example, when using OpenPGP. The highest threat from this vulnerability is to confidentiality. (CVE-2021-33560)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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 libgcrypt' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2022-1578.html

https://alas.aws.amazon.com/cve/html/CVE-2021-33560.html

Plugin Details

Severity: Critical

ID: 159563

File Name: ala_ALAS-2022-1578.nasl

Version: 1.3

Type: local

Agent: unix

Published: 4/6/2022

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-33560

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libgcrypt, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:libgcrypt-devel, p-cpe:/a:amazon:linux:libgcrypt-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/4/2022

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-33560

ALAS: 2022-1578