Microsoft IIS HTTP GET request with false "Content-Length" field can cause a denial of service
| iis-false-content-length-dos (7691) |  Medium 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.
Consequences:
Denial of Service
Remedy:
No remedy available as of May 1, 2013.
References:
- BugTraq Mailing List, Tue Dec 11 2001 - 09:31:43 CST: Microsoft IIS/5 bogus Content-length bug..
- BugTraq Mailing List, Tue Dec 11 2001 - 09:31:43 CST: Microsoft IIS/5 bogus Content-length bug Memory attack.
- BugTraq Mailing List, Wed Dec 12 2001 - 13:01:26 CST: Microsoft IIS/5.0 Content-Length DoS (proved).
- 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.
- OSVDB ID: 13439: Microsoft IIS HTTP Request Malformed Content-Length DoS
Platforms Affected:
- Microsoft Internet Information Server 5.0
Reported:
Dec 11, 2001
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