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MS.ASP.NET.NumberOfCPUs.Requests.DoS

Release Date

Aug 11, 2009

Severity

medium

Impact

Denial of Service: Remote attackers can crash vulnerable systems.

Description

This indicates an attack attempt against a denial of service vulnerability in ASP.NET when running on IIS.

The vulnerability is caused by an error when ASP.NET doesn't decrement a counter used to determine how many requests and concurrently being processed. It allows a remote attacker to cause ASP.NET to stop processing requests.

Affected Products

Microsoft .NET Framework 2.0 Service Pack 1
Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5 Service Pack 1

Recommended Actions

Apply patch, available from the web site:
http://www.microsoft.com/technet/security/Bulletin/MS09-036.mspx

Coverage

IPS
VCM

Common Vulnerabilities and Exposures (CVE)

CVE-2009-1536

Reference/s

http://www.frsirt.com/english/advisories/2009/2231 (FrSIRT)
http://www.securityfocus.com/bid/35985 (BugTraq)
http://technet.microsoft.com/en-us/security/bulletin/MS09-036.mspx (MS-ID)

Reference: VID-17656