MiniShare Can Be Crashed By Remote Users With Incomplete HTTP Requests
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SecurityTracker Alert ID: 1010291
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SecurityTracker URL: http://securitytracker.com/id?1010291
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: May 26 2004
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Impact: Denial of service via network
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Exploit Included: Yes
Vendor Confirmed: Yes
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Version(s): 1.3.2
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Description: Donato Ferrante reported a vulnerability in MiniShare. A remote user can cause the service to crash.
It is reported that a remote user can send an HTTP GET or HEAD request with one or fewer newline characters to cause the web server to crash.
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Impact: A remote user can cause the web service to crash.
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Solution: No solution was available at the time of this entry. The vendor reportedly plans to issue a fix in the next version.
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Vendor URL: minishare.sourceforge.net/ (Links to External Site)
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Cause: Exception handling error, State error
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Underlying OS: Windows (Any)
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Reported By: Donato Ferrante <fdonato@autistici.org>
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Message History:
None.
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Source Message Contents
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Date: Wed, 26 May 2004 13:13:11 -0000
From: Donato Ferrante <fdonato@autistici.org>
Subject: DoS in MiniShare 1.3.2
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Donato Ferrante
Application: MiniShare
http://minishare.sourceforge.net/
Version: 1.3.2
Bug: Denial Of Service
Date: 26-May-2004
Author: Donato Ferrante
e-mail: fdonato@autistici.org
web: www.autistici.org/fdonato
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1. Description
2. The bug
3. The code
4. The fix
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1. Description:
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Vendor's description:
"MiniShare is meant to serve anyone who has the need to share files
to anyone, doesn't have a place to store the files on the web,
and does not want or simply does not have the skill and possibility
to set up and maintain a complete HTTP-server software such as Apache.
The application is meant to be as easy to use as any common software
most users use daily. However, this doesn't mean experienced users
can't find it useful."
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2. The bug:
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The program is unable to manage some user's requests.
In fact it waits at the end of each request at least two newlines.
So if you send to the webserver a GET or an HEAD request with no or
at most one newline, the webserver will crash.
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3. The code:
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To test the vulnerability send to the webserver a request like:
GET:
1. GET /something HTTP/1.1
2. GET /something HTTP/1.1\n
HEAD:
1. HEAD /something HTTP/1.1
2. HEAD /something HTTP/1.1\n
and the webserver will crash.
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4. The fix:
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Vendor was contacted.
Bug will be fixed in the next version.
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