Technical Information

Brief overview of the risk:
This security update resolves one publicly disclosed vulnerability and two privately reported vulnerabilities in Microsoft Windows HTTP Services (WinHTTP). The most severe vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could take complete control of an affected system.
Detailed Information on the risk:
A remote code execution vulnerability exists in the way that Windows HTTP Services handle specific values that are returned by a remote Web server. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with the same user rights as the service or application which calls the WinHTTP API to connect to the attacker’s Web server. Further information on this exploit is available at : MS09-013