Microsoft .NET Framework 1.1 SP1, 2.0 SP1 and SP2, 3.5, 3.5 SP1, 3.5.1, and 4.0, as used for ASP.NET in Microsoft Internet Information Services (IIS), provides detailed error codes during decryption attempts, which allows remote attackers to decrypt and modify encrypted View State (aka __VIEWSTATE) form data, and possibly forge cookies or read application files, via a padding oracle attack, aka "ASP.NET Padding Oracle Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12365
https://exchange.xforce.ibmcloud.com/vulnerabilities/61898
http://www.vupen.com/english/advisories/2010/2751
http://www.vupen.com/english/advisories/2010/2429
http://www.securityfocus.com/bid/43316
http://weblogs.asp.net/scottgu/archive/2010/09/18/important-asp-net-security-vulnerability.aspx
http://threatpost.com/en_us/blogs/new-crypto-attack-affects-millions-aspnet-apps-091310
http://securitytracker.com/id?1024459
http://secunia.com/advisories/41409
http://pentonizer.com/general-programming/aspnet-poet-vulnerability-what-else-can-i-do/
https://github.com/bongbongco/MS10-070
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-3330
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-070
http://www.troyhunt.com/2010/09/fear-uncertainty-and-and-padding-oracle.html
http://www.mono-project.com/Vulnerabilities#ASP.NET_Padding_Oracle
http://www.microsoft.com/technet/security/advisory/2416728.mspx
http://www.ekoparty.org/juliano-rizzo-2010.php
http://twitter.com/thaidn/statuses/24832350146
http://blogs.technet.com/b/srd/archive/2010/09/17/understanding-the-asp-net-vulnerability.aspx