"Details of the proof-of-concept code appear to match the vulnerability information shared with Microsoft Active Protection Program (MAPP) partners," Yunsun Wee, a director with Microsoft's Trustworthy Computing group, said in a statement posted on the .
"Microsoft is actively investigating the disclosure of these details and will take the necessary actions to protect customers and ensure that confidential information we share is protected pursuant to our contracts and program requirements," Wee added.
Under MAPP, Microsoft provides select antivirus companies with technical information about bugs before Microsoft patches the flaws. MAPP is meant to give third-party security vendors advance warning so that they can craft detection signatures.
Among the things Microsoft shares with MAPP members, according to a , are "proof-of-concept or repro tools that further illuminate the issue and help with additional protection enhancement."
The Friday acknowledgment by Microsoft was prompted by , the Italian researcher who reported the vulnerability in Windows Remote Desktop Protocol (RDP) in May 2011.