78054 : Microsoft .NET Framework Forms Authentication Return URL Handling Arbitrary Site Redirect
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Timeline

Disclosure Date
2011-12-29

Description

Microsoft .NET Framework contains a flaw that allows a remote cross site redirection attack. This flaw exists due to an error in the authentication of forms when handling a returned URL. This could allow a user to create a specially crafted URL, that if clicked, would redirect a victim from the intended legitimate web site to an arbitrary web site of the attacker's choosing. Such attacks are useful as the crafted URL initially appear to be a web page of a trusted site. This could be leveraged to direct an unsuspecting user to a web page containing attacks that target client side software such as a web browser or document rendering programs.

Classification

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

Solution

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.

Products

Microsoft Corporation
.NET Framework
3.5.1
2.0 SP2
3.5 SP1
4.0

References

Credit

CVSSv2 Score

CVSSv2 Base Score = 6.8
Source: nvd.nist.gov | Generated: 2011-12-30 | Disagree?

Access_vector_2 Access_complexity_1 Authentication_2 Confidentiality_impact_1 Integrity_impact_1 Availability_impact_1

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