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Posted

I have a clients site whose server is vulnerable to the somefile.php.jpg executable attack due to the way his Apache server is configured. I fixed his upload scripts to strip out any code with ".php." in the uploaded file names, but I want to make sure there isn't any other way they can use this attack on the site.

I don't have control panel or shell access to the site, just strictly FTP access. I want to know, is there a way to override the default Apache handler of "AddHandler x-httpd-php .php" (which is what causes the vulnerability) with "AddType x-httpd-php .php" using an htaccess file. I have been reading up on it, but it seems all documentation points to the servers config files.

I am not 100% sure, but I think it can be done using a mod rewrite somehow in an htaccess file, but if so, I don't know how to format the override.

Anyone have experience with this flaw and how to block it (short of sanitizing the upload scripts).

I am thinking something along the lines of "RemoveHandler .php." or "RemoveType .php."

Posted
I have a clients site whose server is vulnerable to the somefile.php.jpg executable attack due to the way his Apache server is configured. I fixed his upload scripts to strip out any code with ".php." in the uploaded file names, but I want to make sure there isn't any other way they can use this attack on the site.

I don't have control panel or shell access to the site, just strictly FTP access. I want to know, is there a way to override the default Apache handler of "AddHandler x-httpd-php .php" (which is what causes the vulnerability) with "AddType x-httpd-php .php" using an htaccess file. I have been reading up on it, but it seems all documentation points to the servers config files.

I am not 100% sure, but I think it can be done using a mod rewrite somehow in an htaccess file, but if so, I don't know how to format the override.

Anyone have experience with this flaw and how to block it (short of sanitizing the upload scripts).

I am thinking something along the lines of "RemoveHandler .php." or "RemoveType .php."

don't piss around sanitize the damn upload script.

Posted
I fixed his upload scripts to strip out any code with ".php." in the uploaded file names, but I want to make sure there isn't any other way they can use this attack on the site.

I just wanted a way to force this site wide in the event that they figure out any other flaws with his site that I am not aware of.I am not a security expert, but I do know his site has some holes in it like swiss cheese. They managed to deface his site using a php script with "somefile.php.jpg" to overwrite his homepage. Now when they come back to the upload page it will not let this attack work and I have it set to alert me of their ip address when they upload anything with a ".php." in the file name.

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