CVE-2020-8950

The AUEPLauncher service in Radeon AMD User Experience Program Launcher through 1.0.0.1 on Windows allows elevation of privilege by placing a crafted file in %PROGRAMDATA%AMDPPCupload and then creating a symbolic link in %PROGRAMDATA%AMDPPCtemp that points to an arbitrary folder with an arbitrary file name.

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

• https://heynowyouseeme.blogspot.com/2020/02/another-privilege-escalation-filewrite.html
• https://heynowyouseeme.blogspot.com/2020/02/privilege-escalation-filewrite-eop-in.html