Microsoft Security Advisory: Vulnerabilities in SMB could allow remote code execution
Microsoft is investigating new public reports of a possible vulnerability in Microsoft Server Message Block (SMB) implementation. We are not aware of attacks that try to use the reported vulnerabilities or of customer impact at this time.
We are actively working with partners in our Microsoft Active Protections Program (MAPP) to provide information that they can use to provide broader protections to customers.
Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.
Microsoft is concerned that this new report of a vulnerability was not responsibly disclosed, potentially putting computer users at risk. We continue to encourage responsible disclosure of vulnerabilities. We believe the commonly accepted practice of reporting vulnerabilities directly to a vendor serves everyone’s best interests. This practice helps to ensure that customers receive comprehensive, high-quality updates for security vulnerabilities without exposure to malicious attackers while the update is being developed.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB975497.