78055 : Microsoft .NET Framework ASP.NET Username Parsing Authentication Bypass
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
5 1665 over 2 years ago 10 months ago 23 times 100%


Disclosure Date
Time to Exploit
179 days


Microsoft .NET Framework contains a flaw that is triggered by the way ASP.NET improperly parses usernames. This may allow an attacker to bypass authentication.


Location: Remote / Network Access
Attack Type: Authentication Management, Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS
Exploit: Exploit Public
Disclosure: Vendor Verified, Coordinated Disclosure


Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability. Check the vendor advisory or solution in the references section.


Microsoft Corporation
.NET Framework
1.1 SP1
3.5 SP1
2.0 SP2



CVSSv2 Score

CVSSv2 Base Score = 8.5
Source: nvd.nist.gov | Generated: 2011-12-30 | Disagree?

Access_vector_2 Access_complexity_1 Authentication_1 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2


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