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From: RSnake (rsnakeshocking.com)
Date: Fri Apr 26 2002 - 16:07:05 CDT
| Please note that it is safe only if all scripts (PHP, perl, etc) are
| running with user privileges.
| If the suexec wrapped isn't active, or if PHP doesn't run in CGI mode,
| files created by scripts will be owned by the server uid (usually nobody) .
| There are plenty of free PHP and Perl scripts that are coming with an
| "installer". People upload a package to the server, browse an URL to launch
| the installation script, answer a few questions, and files are automatically
| copied into proper locations. These files typically contain passwords for
| SQL databases, and once copied by the installation script, they belong to
| +SymlinksIfOwnerMatch doesn't prevent users from creating a script that
| will create a symbolic link to some other customer's files as nobody. Owners
| will match.
| All symbolic links can be forbidden (-FollowSymlinks and nothing else) .
| But hard links are worse. Apache will follow them regardless of your
| configuration files. As a lot of customers are using the same packages, it's
| quite easy to find out what files have to be linked.
| So, to sleep more quietly :
| - Use suexec.
| - Use PHP safe_mode if you really can't run PHP in CGI mode.
| - Place users home directories in unguessable locations
| (/users/B67h6768/9dqzsu_-zeu/_6p+/john/ , with all directories no read
| attribute on directories) .
I don't have to know where it is. Chrooted jails are the only way to
RRrRRRr. | RSnake at shocking dot com 0x7A69
RR' `RR | EHAP Founder / WebFringe.com Founder
RR | He who made kittens put snakes in the grass.
RR | DSS:5923 76D7 0EC2 4553 7195 442B 8596 4849 2AA6 1F64
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