Security problem in package-cat.cgi (Sigh, damn russians)

Security problem in package-cat.cgi (Sigh, damn russians)

[Daniel Berlin]

Someone in the .ru domain used a package-cat.cgi script to remotely  
dump the bug database to a file and tried to download it, probably  
looking for passwords:


<fche>   |   |-httpd
<fche>   |   |   `-package-cat.cgi  
/var/www/sourceware/htdocs/cygwin/cgi-bin2/package-cat.cgi
<fche>   |   |       `-sh -c  
mysqldump\040-uroot\040bugs\040>/tmp/session
<fche>   |   |           `-mysqldump -uroot bugs
This dump file was about 400 meg.

No clue if they got the whole thing.  it's doubtful they were on a fast  
enough connection, or else they wouldn't have kept trying to redo it  
each time we deleted the file.

Since the dump starts with the attachments database for bugzilla, which  
is a couple hundred meg, they probably just have a bunch of compressed,  
preprocessed source code that makes the compiler crash :).

However, even if they did get passwords, Bugzilla passwords are  
crypt(3)'d using an 8 character random salt (let's here it for good  
coding!):

     # Generate the salt.  We use an 8 character (48 bit) salt for  
maximum
     # security on systems whose crypt uses MD5.  Systems with older
     # versions of crypt will just use the first two characters of the  
salt.
     my $salt = '';
     for ( my $i=0 ; $i < 8 ; ++$i ) {
         $salt .= $saltchars[rand(64)];
     }


However, so that this doesn't happen again *anyway* I've added a local  
user password to the mysql database (it used to be anyone with shell  
access could access the db), and fche blackholed these lusers.

Even so, i would strongly advise someone fix or remove the  
package-cat.cgi script so that this can't happen again.

fgrep the logs for 194.226.227.5 for other things they tried to do.

<fche> 194.226.227.5 - - [12/Jul/2004:15:56:14 +0000] "GET  
/cgi-bin2/package-cat.cgi?file=|ls%20-la%20../..| HTTP/1.0" 200 9023  
"-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; MyIE2)"
<fche> cygwin-combined_log:194.226.227.5 - - [12/Jul/2004:14:50:29  
+0000] "GET  
/cgi-bin2/package-cat.cgi?file=../../../../../../../../../../etc/ 
passwd%00&grep=p HTTP/1

--Dan