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Amazon Linux 2023 : openssl, openssl-devel, openssl-libs (ALAS2023-2024-727)

high Nessus Plugin ID 208967

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2024-727 advisory.

 Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption.
 The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE and validate the order of the public key. (CVE-2024-41996)

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 'dnf update openssl --releasever 2023.6.20241010' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2024-727.html

https://alas.aws.amazon.com/cve/html/CVE-2024-41996.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: High

ID: 208967

File Name: al2023_ALAS2023-2024-727.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/14/2024

Updated: 10/14/2024

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: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2024-41996

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:N/I:N/A:H

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:openssl-debugsource, p-cpe:/a:amazon:linux:openssl-perl, p-cpe:/a:amazon:linux:openssl-snapsafe-libs-debuginfo, p-cpe:/a:amazon:linux:openssl-snapsafe-libs, p-cpe:/a:amazon:linux:openssl-libs-debuginfo, p-cpe:/a:amazon:linux:openssl-devel, p-cpe:/a:amazon:linux:openssl-debuginfo, p-cpe:/a:amazon:linux:openssl, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:openssl-libs

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/10/2024

Vulnerability Publication Date: 8/26/2024

Reference Information

CVE: CVE-2024-41996