Avira Prime Link Following Local Privilege Escalation Vulnerability

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of Avira Prime. 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 Avira Spotlight Service. By creating a symbolic link, an attacker can abuse the service to delete a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

Additional Details

Fixed in Speedup version 6.27.19
https://public-beta.avira.com/download/speedup-windows/avira_system_speedup.exe

Disclosure Timeline

• 2023-11-01 - Vulnerability reported to vendor
• 2024-05-17 - Coordinated public release of advisory
• 2024-07-01 - Advisory Updated

Credit

Filip Dragovic (@filip_dragovic)

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