Microsoft IIS ASP HTTP header parsing buffer overflow
| iis-asp-http-header-bo (8797) |  High Risk |
Description:
Microsoft Internet Information Server (IIS) is vulnerable to a buffer overflow in the handling of HTTP headers, caused by an error in the processing of HTTP header fields by Active Server Pages (ASP). Prior to the parsing of HTTP header fields, IIS performs a safety check to ensure that the HTTP header fields are separated by delimiting characters. By sending a specially-crafted HTTP request that spoofs this safety check, a remote attacker could overflow one of the HTTP header field buffers and execute arbitrary code on the system with elevated privileges or cause the IIS service to fail.
Platforms Affected:
- Microsoft, IIS 4.0
- Microsoft, IIS 5.0
- Microsoft, IIS 5.1
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS02-018. See References.
For IIS:
Microsoft originally provided a patch for this vulnerability in MS02-018, but it has been superseded by the patch released with MS02-062, and then superseded by the patch released with MS03-018. See References.
Note: This vulnerability also affects several Cisco products that use IIS. For affected products and upgrade or patch information, refer to Cisco Security Advisory: Microsoft IIS Vulnerabilities in Cisco Products - MS02-018. See References.
Consequences:
Gain Access
References:
- CERT Advisory CA-2002-09, Multiple Vulnerabilities in Microsoft IIS at http://www.cert.org/advisories/CA-2002-09.html.
- CIAC Information Bulletin M-066, Microsoft Cumulative Patch for Internet Information Services (IIS) Vulnerabilities at http://www.ciac.org/ciac/bulletins/m-066.shtml.
- Cisco Systems Inc. Security Advisory, 2002 April 15 18:00 (UTC -0400), Microsoft IIS Vulnerabilities in Cisco Products - MS02-018 at http://www.cisco.com/warp/public/707/Microsoft-IIS-vulnerabilities-MS02-018.shtml.
- Internet Security Systems Security Alert #114, Multiple Remote Vulnerabilities in Microsoft IIS at http://www.iss.net/xforce/alerts/id/advise114.
- Microsoft Knowledge Base Article 319733, MS02-018: April 2002 Cumulative Patch for Internet Information Services at http://support.microsoft.com/default.aspx?scid=kb;[LN];319733.
- Microsoft Knowledge Base Article 321130, MS02-018: Patch Available for Buffer Overrun in HTTP Header Handling Vulnerability at http://support.microsoft.com/default.aspx?scid=kb;[LN];321130.
- Microsoft Security Bulletin MS02-018, Cumulative Patch for Internet Information Services (Q319733) at http://www.microsoft.com/technet/security/bulletin/ms02-018.mspx.
- Microsoft Security Bulletin MS02-062, Cumulative Patch for Internet Information Service (Q327696) at http://www.microsoft.com/technet/security/Bulletin/MS02-062.mspx.
- Microsoft Security Bulletin MS03-018, Cumulative Patch for Internet Information Service (811114) at http://www.microsoft.com/technet/security/bulletin/ms03-018.mspx.
- National Infrastructure Protection Center Advisory 02-002, Multiple Remote Vulnerabilities in Microsoft's Internet Information Services (IIS) at http://www.nipc.gov/warnings/advisories/2002/02-002.htm.
- BID-4476: Microsoft IIS HTTP Header Field Delimiter Buffer Overflow Vulnerability
- CVE-2002-0150: Buffer overflow in Internet Information Server (IIS) 4.0, 5.0, and 5.1 allows remote attackers to spoof the safety check for HTTP headers and cause a denial of service or execute arbitrary code via HTTP header field values.
- OSVDB ID: 3316: Microsoft IIS HTTP Header Field Delimiter Overflow
- US-CERT VU#454091: Microsoft Internet Information Server (IIS) vulnerable to buffer overflow via inaccurate checking of delimiters in HTTP header fields
Reported:
Apr 10, 2002
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