CVE-2022-32450

AnyDesk 7.0.9 allows a local user to gain SYSTEM privileges via a symbolic link because the user can write to their own %APPDATA% folder (used for ad.trace and chat) but the product runs as SYSTEM when writing chat-room data there.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• http://anydesk.com
• http://packetstormsecurity.com/files/167608/AnyDesk-7.0.9-Arbitrary-File-Write-Denial-Of-Service.html
• http://seclists.org/fulldisclosure/2022/Jul/9
• https://seclists.org/fulldisclosure/2022/Jun/44