ID:2717 - Exploit for Privilege escalation in WinRAR - CVE-2018-20251

Link to public exploit:

Vulnerability description

The vulnerability allows a local attacker to gain elevated privileges.

The vulnerability exists due to a validation function (in WinRAR code) that inspects the filename field for each compressed file in the ACE archive is being called before extraction of ACE archives. The extraction operation should be aborted and no file or folder should be extracted. However, the check of the return value from the validator function made too late (in UNACEV2.dll), after the creation of files and folders. A local attacker can disallow the filename by the validator function (for example, the filename contains path traversal patterns) and gain elevated privileges.

Remediation