Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.
- XZ Utils version 5.6.0
- XZ Utils version 5.6.1
git clone https://github.com/devjanger/CVE-2024-3094-XZ-Backdoor-Detector.git
cd CVE-2024-3094-XZ-Backdoor-Detector/
chmod +x cve-2024-3094-detector.sh
./cve-2024-3094-detector.sh
