Security Abt Guest Account On Rh 7.3

Hello guys,
I have a Rh 7.3 server running in my lab with guest account enable which is very important for my work can u guys tell me how can someone break into my rh 7.3 box using a gust account only so that i can prevent the attack
waiting

Well I take it the guest account probably has basic access to things like compilers and such. That being said, there are lots of exploits that can escalate the users privileges beyond guest, even to root in some cases. You might want to think about chroot'ing the guest account to restrict access and help prevent someone from doing harm to your system. Check out this tutorial on how to chroot an account

Preventing the Guest account from downloading any files over the internet such as tools could perhaps help u secure the server a bit better. GL

Cybr1d > true, preventing downloads would keep a user from getting exploit code or rootkits onto the system, but only for a short while. A determined person would just download to their box, then copy and paste the code, or type it by hand if pasting wouldnt work. Basically to keep that account safe from someoen executing code you not only have to prevent them from getting the tools, but also really you would need to completely disallow access to compilers. Even with no compiler access and the inability to download things from the internet, there is still the chance that they could use a bash script to accomplish some form of privilege elevation. Unfortunately the more secure you make the account, the less features you have available, which hinders the use of the account, so you have to ask yourself what kind of a balance between security and functionality you want.

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. . . tell me how can someone break into my rh 7.3 box using a gust account only so that i can prevent the attack

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Only so you can prevent it? Not trying to pass judgment onto you, but wouldn't it suffice to tell you how to prevent it? And not how to actually gain root. Syini666 and Cybr1d bring up some good basic ideas, but if you are actually just trying to secure and prevent things from happening to this box I would suggest to do a simple google search on securing a guest account on RedHat or Linux.

And just curious, why is the guest account very important? Guest accounts by definition are insecure because there is no association to the user, and no way to know or make an educated guess as to who is on that box, or was on it. I would strongly recommend for you to just completely disable or remove the guest account to prevent anything malicious from happening with it.