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ASP.NET RCP/encoded Mode Denial of Service Vulnerability
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Secunia Advisory:
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SA16005
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Release Date:
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2005-07-12
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Popularity:
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7,699 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | ASP.NET 1.x
Microsoft .NET Framework 1.x
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Description:
SPI Labs has reported a vulnerability in ASP.NET, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an input validation error in the "System.Xml.Serialization.Xml.XmlSerializationReader.ReadReferencedElements()" function. This can be exploited to cause an infinite loop and consume a large amount of CPU resources on a vulnerable system by sending a specially crafted SOAP message to a RCP/encoded web method, which takes an array as input.
Solution:
Use the document/literal mode for web services handling input from untrusted sources.
The vulnerability will reportedly be fixed in an upcoming release.
Provided and/or discovered by:
Bryan Sullivan and Sacha Faust, SPI Labs.
Original Advisory:
SPI Labs:
http://www.spidynamics.com/spilabs/advisories/aspRCP.html
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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