Amazon Linux 2 : NetworkManager-libreswan (ALAS-2024-2703)

high Nessus Plugin ID 213346

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Synopsis

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

Description

The version of NetworkManager-libreswan installed on the remote host is prior to 1.2.4-4. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2703 advisory.

A flaw was found in the libreswan client plugin for NetworkManager (NetkworkManager-libreswan), where it fails to properly sanitize the VPN configuration from the local unprivileged user. In this configuration, composed by a key-value format, the plugin fails to escape special characters, leading the application to interpret values as keys. One of the most critical parameters that could be abused by a malicious user is the `leftupdown`key. This key takes an executable command as a value and is used to specify what executes as a callback in NetworkManager-libreswan to retrieve configuration settings back to NetworkManager. As NetworkManager uses Polkit to allow an unprivileged user to control the system's network configuration, a malicious actor could achieve local privilege escalation and potential code execution as root in the targeted machine by creating a malicious configuration. (CVE-2024-9050)

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 NetworkManager-libreswan' to update your system.

Plugin Details

Severity: High

ID: 213346

File Name: al2_ALAS-2024-2703.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 12/23/2024

Updated: 12/23/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2024-9050

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:networkmanager-libreswan, p-cpe:/a:amazon:linux:networkmanager-libreswan-debuginfo, p-cpe:/a:amazon:linux:networkmanager-libreswan-gnome

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/5/2024

Vulnerability Publication Date: 10/22/2024

Reference Information

CVE: CVE-2024-9050

Detections

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