MinorRev: Microsoft Security Bulletin MS05-004 - ASP.NET Path Validation Vulnerability (887219)

From: Russ Cooper (Russ.Cooper_at_TRUSECURE.CA)
Date: 03/16/05

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    Date:         Wed, 16 Mar 2005 17:09:34 -0500
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    Microsoft Security Bulletin MS05-004:
    ASP.NET Path Validation Vulnerability (887219)

    Bulletin URL:
    <http://www.microsoft.com/technet/security/Bulletin/MS05-004.mspx>

    Reason for Revision: Bulletin 'Caveats' section has been updated to document known issues that customers may experience when installing the available security updates.
    Version Number: 1.2
    Issued Date: Tuesday, February 08, 2005
    Revision Date: Wednesday, March 16, 2005
    Impact of Vulnerability: Information Disclosure, possible Elevation of Privilege
    Maximum Severity Rating: Important
    Patch(es) Replaced: None.
    Caveats: Microsoft Knowledge Base Article 887219 documents the currently known issues that customers may experience when they install this security update. The article also documents recommended solutions for these issues. For more information, see Microsoft Knowledge Base Article 887219.

    Tested Software:
    Affected Software:
    ------------------
    * Microsoft .NET Framework 1.0

    Affected Components:
    --------------------
    * ASP.NET

    Technical Description:
    ----------------------
    * Path Validation Vulnerability - CAN-2004-0847. A canonicalization vulnerability exists in ASP.NET that could allow an attacker to bypass the security of an ASP.NET Web site and gain unauthorized access. An attacker who successfully exploited this vulnerability could take a variety of actions, depending on the specific contents of the website.

    Revision History:
    -----------------
    * v1.0 - 2/8/2005: Bulletin published
    * v1.1 - 2/15/2005: Bulletin updated to include Knowledge Base Article numbers for each individual download under Affected Products.
    * v1.2 - 3/16/2005: Bulletin 'Caveats' section has been updated to document known issues that customers may experience when installing the available security updates.

    This email is sent to NTBugtraq automagically as a service to my subscribers. (v4.01.1901.19075)

    Cheers,
    Russ Cooper - Senior Scientist - Cybertrust/NTBugtraq Editor 

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NTBugtraq Editor's Note:
Most viruses these days use spoofed email addresses. As such, using an Anti-Virus product which automatically notifies the perceived sender of a message it believes is infected may well cause more harm than good. Someone who did not actually send you a virus may receive the notification and scramble their support staff to find an infection which never existed in the first place. Suggest such notifications be disabled by whomever is responsible for your AV, or at least that the idea is considered.
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