Local File Verification Flaw in Avast Business Antivirus for Linux

CVE-2025-4134

What is CVE-2025-4134?

A vulnerability exists in Avast Business Antivirus for Linux wherein the software fails to adequately verify the authenticity of update files, specifically during the do_update_vps process. This oversight allows local users to potentially spoof or modify update files without detection, posing a security threat to the integrity of the antivirus software. Proper file validation is crucial in preventing unauthorized changes that could lead to system compromise.

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