On that note you might as well deny php5 too --Ryan Neufeld IT Systems Manager it@xxxxxxxxxxxxxxxxxxx MagPower Systems Inc. Ph: (640)940-3232 Fax: (640)940-3233 -----Original Message----- From: Gadi Evron [mailto:ge@xxxxxxxxxxxx] Sent: Thursday, April 12, 2007 9:50 AM To: rurban@xxxxxxxx Cc: bugtraq@xxxxxxxxxxxxxxxxx Subject: Re: Critical phpwiki c99shell exploit On 12 Apr 2007 rurban@xxxxxxxx wrote: > Via the Phpwiki 1.3.x UpLoad feature some hackers from russia uploaded a php3 or php4 file, > install a backdoor at port 8081 and have access to your whole disc and overtake the server. > > A url in the file is http://ccteam.ru/releases/c99shell > > The uploaded file has a php, php3 or php4 extension and looks like a gif to the mime magic. > So apache usually accepts it. > > To fix this phpwiki issue at first move the lib/plugin/UpLoad.php file out of this directory. > > You can fix it by adding those two lines to your list of disallowed extensions: > php3 > php4 > Currently only "php" is disallowed. > This is a good best practice, but it doesn't hold water long range. Further, where do you disallow these extensions? In the application? Mostly what the bad guys would do is upload, say.. .jpg, and then rename it. Gadi. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 269.3.0/758 - Release Date: 4/12/2007 11:52 AM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 269.3.0/758 - Release Date: 4/12/2007 11:52 AM
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