Microsoft IIS HTTP GET request with false "Content-Length" field can cause a denial of service
| iis-false-content-length-dos (7691) |  Low Risk |
Description:
Microsoft Internet Information Server (IIS) is vulnerable to a denial of service attack. If a remote attacker sends the Web server a specially-crafted HTTP GET request containing a false "Content-Length" header field, the attacker can cause the connection to remain open and become unresponsive while waiting for more data. Opening multiple connections such as this could result in a denial of service against the affected server.
Platforms Affected:
- Microsoft, IIS 5.0
Remedy:
No remedy available as of November 29, 2008.
Consequences:
Denial of Service
References:
- BugTraq Mailing List, Tue Dec 11 2001 - 09:31:43 CST, Microsoft IIS/5 bogus Content-length bug. at http://archives.neohapsis.com/archives/bugtraq/2001-12/0098.html.
- BugTraq Mailing List, Tue Dec 11 2001 - 09:31:43 CST, Microsoft IIS/5 bogus Content-length bug Memory attack at http://archives.neohapsis.com/archives/bugtraq/2001-12/0098.html.
- BugTraq Mailing List, Wed Dec 12 2001 - 13:01:26 CST, Microsoft IIS/5.0 Content-Length DoS (proved) at http://archives.neohapsis.com/archives/bugtraq/2001-12/0115.html.
- BID-3667: Microsoft IIS False Content-Length Field DoS Vulnerability
- CVE-2001-1186: Microsoft IIS 5.0 allows remote attackers to cause a denial of service via an HTTP request with a content-length value that is larger than the size of the request, which prevents IIS from timing out the connection.
Reported:
Dec 11, 2001
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