Technical Information

Brief overview of the risk:
This security update resolves a publicly disclosed vulnerability in ASP.NET. The vulnerability could allow information disclosure.
Detailed Information on the risk:

An information disclosure vulnerability exists in ASP.NET due to improper error handling during encryption padding verification. An attacker who successfully exploited this vulnerability could read data, such as the view state, which was encrypted by the server. This vulnerability can also be used for data tampering, which, if successfully exploited, could be used to decrypt and tamper with the data encrypted by the server. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to produce information that could be used to try to further compromise the affected system.

Further information on this exploit is available at : MS10-070