[NEWS] PWebServer Directory Traversal Vulnerability

From: SecuriTeam (support_at_securiteam.com)
Date: 03/10/04

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Date: 10 Mar 2004 19:31:06 +0200

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      PWebServer Directory Traversal Vulnerability
    ------------------------------------------------------------------------

    SUMMARY

     <http://sourceforge.net/projects/pwebserver/> PWebServer is "a simple
    Java multi-threaded Web Server that supports HTTP/1.0 protocol.It mainly
    meant as an educational example". A directory traversal vulnerability in
    the product allows remote attackers to access files and directories that
    are outside the bounding HTML root directory.

    DETAILS

    Vulnerable Systems:
     * PWebServer version 0.3.3

    Immune Systems:
     * PWebServer version 0.3.4

    Due to a vulnerability in the program patterns like "/../" are not
    blocked, allowing an attacker to view and download all the files on the
    remote system using a browser.

    Examples:
    To test the vulnerability:
    http://[host]:6789/../someFile

    Or:
    http://[host]:6789/../../../../etc/passwd

    ADDITIONAL INFORMATION

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

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