[NEWS] Tiny Server Multiple Vulnerabilities

From: SecuriTeam (support_at_securiteam.com)
Date: 01/26/04

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Date: 26 Jan 2004 16:11:41 +0200

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      Tiny Server Multiple Vulnerabilities
    ------------------------------------------------------------------------

    SUMMARY

    Tiny Server is a very basic HTTP server. This server can accept multiple
    requests at once, but the server is only 56 kb. The server has been
    configured to accept a maximum of 100 connections. As of now
    <http://sourceforge.net/projects/tinyserver> Tiny Server supports only the
    GET request.

    Tiny Server is vulnerable to a directory traversal attack, cross-site
    scripting and denial of service attacks.

    DETAILS

    Vulnerable Systems:
     * Tiny Server version 1.1 (1.0.5)

    Directory Traversal Vulnerability
    The server doesn't perform adequate checks on the requests being received.
    Specifically, it doesn't filter problematic patterns that can be used to
    traverse the file system. Patterns such as "/../" are accepted. This
    allows a remote attacker to see and download almost any file on the
    server.

    http://[host]/../../windows/system.ini

    Denial of Service
    The server can be brought down due to a bug just by issuing a specially
    crafted string.

    GET /index.htm ( without specifying HTTP/1.1 )
    GET /aaaaaaaaa... HTTP/1.1 ( 260 a's)

    Cross-site Scripting
    The server doesn't check the strings sent by the client properly. In fact,
    the strings are not filtered and would appear in the returned page.

    http://[host]/< script>alert("Test")< /script>

    Vendor Status:
    The vendor has not replied and there is of yet no fix.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:fdonato@autistici.org>
    Donato Ferrante

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