Re: perl-cgi hole in UltimateBB by Infopop Corp.

[secure () SECUREAUSTIN COM (H D Moore)]

Hi,

I am the administrator for a site running the commercial version of UBB,
the problem exists there as well.  The faulty code is in ubb_library.pl:

if ($ThreadFile =~ /\d\d\.[m|n|ubb|cgi]/) {

I don't actually know the original line number, as we hacked up our copy
to use MD5 password hashes versus clear-text and added many new
logging/security features to curb abuse.  Since all of the modifications
to the code were paid for by my client, I may not be able to release
them to the public...

-HD

"Sergei A. Golubchik" wrote:
> Hello.
> Browsing some site, I found that their forums were based not on home-
> made scripts, but rather commercial software product. Hey, said I to
> myself, remember those story about pcweek hack ? They use commercial
> package photoads. Let's look what that Ultimate Bulletin Board by
> Infopop is.
>
> I grabbed freeware version from http://www.ultimatebb.com and
> after 10-minutes grepping found those lines:
>
> ubb_library.pl:901-902
>           if ($ThreadFile =~ /\d\d\d\d\d\d\.ubb/) {
>           open (MESSAGE, "$ForumsPath/Forum$number/$ThreadFile");
>
> (notice? not /^\d\d\d\d\d\d\.ubb$/. What did the author think about while
> writing it ? Girls ?)
>
> And the $ThreadFile takes its value directly from the hidden (hmm!)
> field `topic'.