How to Prevent Symlink Attacks
ad Impact of Symlink - Suppose you own a small hosting company with a Linux Box, & 1337 sites are hosted there. If an attacker gains access to any single site on your server, he can easily create a symbolic link to / directory & then putting the document root afterwards it. Now the attacker can easily read sensitive files, that can be the configuration file of your billing system. Since, he has local access, now he can easily connect to the mysql & pwn all your clients, & the whole company.
How Symlink is Created - A basic linux command is used in creating symlink. i.e,
ln -s source_file link_name
:: 0x02 Protecting ::
1.Change the permission of /bin/ln to 400.
2.Locate php.ini by command- "Locate php.ini” (without quotes) Edit the main php.ini & disable symlink & proc_open.
3.If you have a shared host, & it is vulnerable to symlink.Then, change the permission of your configuration files to 400.
4. Turn PHP safe_mode ON
Was this answer helpful?
Suspect there are other users in your system that have shell access to your system? Please follow...
In the below examples we are using ETH0 as network interface, however if you are using our...
You just need to configure two csf directives, thats it. The two directives are PORTFLOOD and...
If you run your own mail server you'll want it to run spam filtering software to reduce the...
Rkhunter (Rootkit Hunter) is an open source Unix/Linux based scanner tool for Linux systems...