INFORMATION BULLETIN
INFORMATION BULLETIN
| PROBLEM: | A path validation vulnerability was discovered in ASP.NET. The canonicalization routine that is used by ASP.NET to map the request does not correctly parse the URL. |
| PLATFORM: | Microsoft .NET Framework 1.0 Windows 2000 Service Pack 3 or Service Pack 4 Windows XP Service Pack 1 or Windows XP Service Pack 2 Windows Server 2003 Windows XP Tablet PC Edition Windows XP Media Center Edition Windows 2000 Service Pack 3 or Service Pack 4 Windows XP Service Pack 1 or Windows XP Service Pack 2 Windows Server 2003 Windows XP Tablet PC Edition Windows XP Media Center Edition Microsoft .NET Framework 1.1 Windows 2000 Service Pack 3 or Service Pack 4 Windows XP Service Pack 1 or Windows XP Service Pack 2 Windows XP Tablet PC Edition Windows XP Media Center Edition Windows Server 2003 Windows 2000 Service Pack 3 or Service Pack 4 Windows XP Service Pack 1 or Windows XP Service Pack 2 Windows XP Tablet PC Edition Windows XP Media Center Edition Windows Server 2003 |
| DAMAGE: | This is an information disclosure vulnerability that could lead to an elevation privilege in some cases. An attacker who successfully exploited this vulnerability could gain unauthorized access to parts of a Web site. The actions that the attacker could take would depend on the specific content being protected. |
| SOLUTION: | Apply the available security update. |
| VULNERABILITY ASSESSMENT: |
The risk is MEDIUM. An attacker could exploit the vulnerability by creating a specially crafted URL and sending the URL to an affected system, which could then allow the attacker to bypass the Web site's security. |
| LINKS: | |
| CIAC BULLETIN: | http://www.ciac.org/ciac/bulletins/p-127.shtml |
| ORIGINAL BULLETIN: | Microsoft Security Bulletin MS05-004 |
| http://www.microsoft.com/technet/security/bulletin/ms05-004.mspx | |
| CVE/CAN: | http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2004-0847 |
REVISION HISTORY:
03/17/2005 - updated Microsoft Security Bulletin MS05-004 to include additions to Caveats section.
06/16/2005 - updated Microsoft Security Bulletin MS05-004 to include Microsofts updated Software
Section for Windows XP Tablet PC Edition and Windows XP Media Center Edition.
[***** Start Microsoft Security Bulletin MS05-004 *****]
Microsoft Security Bulletin MS05-004
ASP.NET Path Validation Vulnerability (887219)
Issued: February 8, 2005
Updated: June 14, 2005
Version: 2.0
Summary
Who should read this document: Customers who use Microsoftฎ Windowsฎ .NET Framework
Impact of Vulnerability: Information Disclosure, possible Elevation of Privilege
Maximum Severity Rating: Important
Recommendation: Customers should install the update at the earliest opportunity.
Security Update Replacement: 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 and Security Update Download Locations:
Affected Software:
Download the update for .NET Framework 1.0 Service Pack 3 for the following operating system versions (886906):
Severity Ratings and Vulnerability Identifiers:
| Vulnerability Identifiers | Impact of Vulnerability | .NET Framework 1.0 | .NET Framework 1.1 |
Path Validation Vulnerability - CAN-2004-0847 | Information Disclosure, Elevation of Privilege | Important | Important |
This assessment is based on the types of systems that are affected by the vulnerability, their typical deployment patterns, and the effect that exploiting the vulnerability would have on them. Security Update Information Installation Platforms and Prerequisites: For information about the specific security update for your platform, click the appropriate link: The Microsoft .NET Framework version 1.0 Service Pack 3 The Microsoft .NET Framework version 1.0 Service Pack 2 The Microsoft .NET Framework version 1.1 Service Pack 1 The Microsoft .NET Framework version 1.1 Obtaining Other Security Updates: Updates for other security issues are available from the following locations: Security updates are available from the ">Microsoft Download Center: You can find them most easily by doing a keyword search for "security_patch". Updates for consumer platforms are available from the Windows Update Web site. Support: Customers in the U.S. and Canada can receive technical support from Microsoft Product Support Services at 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site. Security Resources: The Microsoft TechNet Security Web site provides additional information about security in Microsoft products. Microsoft Software Update Services Microsoft Baseline Security Analyzer (MBSA) Windows Update Windows Update Catalog: For more information about the Windows Update Catalog, see Microsoft Knowledge Base Article 323166. Office Update Software Update Services: By using Microsoft Software Update Services (SUS), administrators can quickly and reliably deploy the latest critical updates and security updates to Windows 2000 and Windows Server 2003-based servers, and to desktop systems that are running Windows 2000 Professional or Windows XP Professional. For more information about how to deploy this security update with Software Update Services, visit the Software Update Services Web site. Software Update Services: By using Microsoft Software Update Services (SUS), administrators can quickly and reliably deploy the latest critical updates and security updates to Windows 2000 and Windows Server 2003-based servers, and to desktop systems that are running Windows 2000 Professional or Windows XP Professional. For more information about how to deploy this security update with Software Update Services, visit the Software Update Services Web site. Systems Management Server: Microsoft Systems Management Server (SMS) delivers a highly-configurable enterprise solution for managing updates. By using SMS, administrators can identify Windows-based systems that require security updates and to perform controlled deployment of these updates throughout the enterprise with minimal disruption to end users. For more information about how administrators can use SMS 2003 to deploy security updates, visit the SMS 2003 Security Patch Management Web site. SMS 2.0 users can also use Software Updates Service Feature Pack to help deploy security updates. For information about SMS, visit the SMS Web site. Note SMS uses the Microsoft Baseline Security Analyzer and the Microsoft Office Detection Tool to provide broad support for security bulletin update detection and deployment. Some software updates may not be detected by these tools. Administrators can use the inventory capabilities of the SMS in these cases to target updates to specific systems. For more information about this procedure, see the following Web site. Some security updates require administrative rights following a restart of the system. Administrators can use the Elevated Rights Deployment Tool (available in the SMS 2003 Administration Feature Pack and in the SMS 2.0 Administration Feature Pack) to install these updates. Disclaimer: The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Revisions: V1.0 (February 8, 2005): Bulletin published V1.1 (February 15, 2005): Bulletin updated to include Knowledge Base Article numbers for each individual download under Affected Products. V1.2 (March 16, 2005): Bulletin Caveats section has been updated to document known issues that customers may experience when installing the available security updates. V2.0 (June 14, 2005): Bulletin updated to announce the availability of an updated package for .NET Framework 1.0 Service Pack 3 for the following operating system versions: (887998) Windows XP Tablet PC Edition and Windows XP Media Center Edition. [***** End Microsoft Security Bulletin MS05-004 *****]
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