An information disclosure vulnerability exists in the Microsoft Web Distributed Authoring and Versioning (WebDAV) client that is caused when it explicitly allows the use of Secure Socket Layer (SSL) 2.0. An attacker who successfully exploited this vulnerability could decrypt portions of encrypted traffic.
To exploit the vulnerability, an attacker could force an encrypted SSL 2.0 session with a WebDAV server that has SSL 2.0 enabled and use a man-in-the-middle (MiTM) attack to decrypt portions of the encrypted traffic. The security update addresses the vulnerability by ensuring that the Microsoft WebDAV client defaults to more secure protocols than SSL 2.0.

Further information on this exploit is available at : MS15-089