Amazon Linux 2 Security Advisory: ALAS-2024-2703
Advisory Release Date: 2024-12-05 01:02 Pacific
Advisory Updated Date: 2024-12-19 16:00 Pacific
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)
Affected Packages:
NetworkManager-libreswan
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update NetworkManager-libreswan to update your system.
aarch64:
NetworkManager-libreswan-1.2.4-4.amzn2.aarch64
NetworkManager-libreswan-gnome-1.2.4-4.amzn2.aarch64
NetworkManager-libreswan-debuginfo-1.2.4-4.amzn2.aarch64
i686:
NetworkManager-libreswan-1.2.4-4.amzn2.i686
NetworkManager-libreswan-gnome-1.2.4-4.amzn2.i686
NetworkManager-libreswan-debuginfo-1.2.4-4.amzn2.i686
src:
NetworkManager-libreswan-1.2.4-4.amzn2.src
x86_64:
NetworkManager-libreswan-1.2.4-4.amzn2.x86_64
NetworkManager-libreswan-gnome-1.2.4-4.amzn2.x86_64
NetworkManager-libreswan-debuginfo-1.2.4-4.amzn2.x86_64