Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Restricting PHP file names

Discussion in 'Security' started by M001, Jun 13, 2014.

  1. M001

    M001 Member

    Joined:
    Aug 30, 2011
    Messages:
    16
    Likes Received:
    0
    Trophy Points:
    51
    cPanel Access Level:
    Root Administrator
    Hi all,

    Lately I've been having some security issues with a software I am using, I believe the software might have some type of exploit that allows files to be uploaded to it's root directory. I don't want to say the name of the software at this point until that vendor has fully checked into it, but as a temporary solution I thought it might be possible to restrict file names of PHP files that are allowed to run under my cpanel account. Is this possible?

    i.e. if the attacker does upload a file called "shell.php", they won't be able to run it if it doesn't match a file name in the list of allows PHP files
     
    #1 M001, Jun 13, 2014
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    44,802
    Likes Received:
    1,895
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello :)

    It might be possible, but I don't really think it would be an effective way of mitigating an attack. Instead, you should ensure Mod_Security is installed with a robust ruleset, and ensure overall security is increased by reviewing any warnings in the "Security Advisor" option within WHM. If it's an exploit within a script, check with the developer to see if a patch is available until a new release is pushed out.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #2 cPanelMichael, Jun 13, 2014
  3. quizknows

    quizknows Well-Known Member

    Joined:
    Oct 20, 2009
    Messages:
    1,011
    Likes Received:
    87
    Trophy Points:
    78
    cPanel Access Level:
    DataCenter Provider
    A good modsecurity rule set will help.

    You can deny a specific file name with a very basic modsecurity rule:

    SecRule REQUEST_URI "shell\.php" "id:2923545,deny"

    You could make additional rules; each needs a unique number after id:
     
    #3 quizknows, Jun 13, 2014
  4. M001

    M001 Member

    Joined:
    Aug 30, 2011
    Messages:
    16
    Likes Received:
    0
    Trophy Points:
    51
    cPanel Access Level:
    Root Administrator
    I am having the developer/vendor check into it, but I want to continue using the software so I don't have any downtime. I thought about making rules that would block certain file names, but all they would have to do is rename the file, which is why I wanted to block all except the permitted file names. Is there any other ideas for this temporary fix? I currently do have mod_security installed for other things, but I don't know how to write many rules.
     
    #4 M001, Jun 13, 2014
  5. quizknows

    quizknows Well-Known Member

    Joined:
    Oct 20, 2009
    Messages:
    1,011
    Likes Received:
    87
    Trophy Points:
    78
    cPanel Access Level:
    DataCenter Provider
    You could do it but it would be a pretty ugly rule. Better to properly investigate the point of entry at this point.
     
    #5 quizknows, Jun 13, 2014
(You must log in or sign up to post here.)
Loading...
Similar Threads - Restricting file names
  1. chanklish

    SOLVED Restricting IP access to a specific website page

    chanklish, Oct 5, 2017, in forum: Security
    Replies:
    8
    Views:
    3,494
    rpvw
    Oct 6, 2017
  2. Mangoose

    Restricting SSH access to 2 or 3 specific IPs

    Mangoose, Feb 17, 2017, in forum: Security
    Replies:
    3
    Views:
    910
    cPanelMichael
    Feb 20, 2017
  3. Xtranetsa

    New Thread Create IPV6 rDNS zone file?

    Xtranetsa, Oct 13, 2018 at 4:11 AM, in forum: Bind/DNS/Nameserver
    Replies:
    0
    Views:
    30
    Xtranetsa
    Oct 13, 2018 at 4:11 AM
  4. GoWilkes

    Core files in cgi-bin?

    GoWilkes, Oct 11, 2018 at 1:53 AM, in forum: General Discussion
    Replies:
    5
    Views:
    67
    Infopro
    Oct 13, 2018 at 5:13 AM
  5. Heena

    Incorrect key file for table try to repair it error

    Heena, Oct 9, 2018 at 5:46 AM, in forum: Database Discussion
    Replies:
    1
    Views:
    39
    cPanelLauren
    Oct 10, 2018 at 11:59 AM

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice