Amazon Linux 2 : libreswan (ALAS-2023-2299)

medium Nessus Plugin ID 183478

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Synopsis

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

Description

The version of libreswan installed on the remote host is prior to 3.25-4.8. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2299 advisory.

A NULL pointer dereference vulnerability was found in the Libreswan package. When an IKEv1 ISAKMP SA Informational Exchange packet contains a Delete/Notify payload followed by further Notifies that act on the ISAKMP SA, such as a duplicated Delete/Notify message, a NULL pointer dereference on the deleted state occurs. This flaw allows a malicious client or attacker to send a malformed IKEv1 Delete/Notify packet, causing a crash and restarting the libreswan pluto daemon. When sent continuously, this could lead to a denial of service attack. (CVE-2023-38712)

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 libreswan' to update your system.

Plugin Details

Severity: Medium

ID: 183478

File Name: al2_ALAS-2023-2299.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/20/2023

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: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-38712

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:libreswan, p-cpe:/a:amazon:linux:libreswan-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: 10/12/2023

Vulnerability Publication Date: 8/11/2023

Reference Information

CVE: CVE-2023-38712

Detections

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