Buildroot Users Beware! Multiple Vulnerabilities Found in Package Integrity Checks

CVECVE-2023-45839
CVSScvssV3_1: 8.1
SourceCVE-2023-45839

Buildroot is an open-source tool used for creating embedded Linux systems. Security researchers recently discovered multiple vulnerabilities in how Buildroot verifies package integrity during the build process.

Specifically, flaws were found in Buildroot’s handling of package hashes. By manipulating network traffic, an attacker could trick the Buildroot builder into accepting packages with invalid hashes. This would allow the insertion of malicious code during the build.

The researchers demonstrated that by exploiting these hash checking weaknesses, an attacker could achieve arbitrary command execution on the Buildroot system. They would gain full control over the build and be able to compromise the final embedded firmware.

Buildroot maintainers have released patched versions to address these issues. Users are urged to upgrade immediately to Buildroot 2023.08.1 or the latest development version. It is also recommended that builds be done on secure, trusted networks to prevent man-in-the-middle attacks during the process.

Proper validation of package signatures and hashes is critical for ensuring the integrity and security of embedded systems. These vulnerabilities illustrate the importance of keeping Buildroot up-to-date with the latest patches to prevent exploitation.

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