Microsoft Office Information Disclosure Vulnerability

An information disclosure vulnerability exists when Microsoft Outlook fails to enforce copy/paste permissions on DRM-protected emails. An attacker who successfully exploited the vulnerability could potentially extract plaintext content from DRM-protected draft emails.

The attacker would have to use another vulnerability to gain access to the victim’s Drafts folder, either locally on the victim’s system or remotely via MAPI.

The security update addresses the vulnerability by correcting how Microsoft Outlook enforces DRM copy/paste permissions.