AVG AntiVirus Free Link Following Denial-of-Service Vulnerability

Vulnerability Details

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of AVG AntiVirus Free. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the AVG Service. By creating a symbolic link, an attacker can abuse the service to create a folder. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

Additional Details

Fixed in Feb 24 Firmware Version 24.Xx

Disclosure Timeline

• 2023-12-08 - Vulnerability reported to vendor
• 2024-07-29 - Coordinated public release of advisory
• 2024-08-15 - Advisory Updated

Credit

Nicholas Zubrisky (@NZubrisky) and Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative

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