How to access /etc/shadow file without root

Connect and share knowledge within a single location that is structured and easy to search. The system I am using is a CentOS 7. Are these steps that I am following correct?

It has been a while since I worked on anything PAM related, but I recently became interested in exploring how to convert the su binary to work with capabilities only, and not require it being setuid-root. Recall, in this environment , being root comes with no super user privilege. However, we shouldn't ever forget that root owns a lot of system files! That was a set of applications those of us, that originally developed Linux-PAM, wrote to prototype modules and libpam improvements against. I had a prototyping project related to libcap now and, while a couple of decades had elapsed, it was fun to take that code out for a spin again. Which is what we actually need to have su correctly function.

How to access /etc/shadow file without root

It is readable only by the root user or super user. To see this feature in action, access a root shell and run following commands. In Ubuntu Linux, by default root account is disabled. If you are following tutorial on Ubuntu Linux, access a super user shell and run following commands. But when we performed the same action from a root user or super user account, shell allowed to it. This security feature keeps encrypted passwords safe from unauthorized users and password cracking programs. In both files, this field represents login name and stores the exactly same information. When a new user account is created, both files are updated simultaneously. This field stores actual user password in encrypted form. For encryption it uses SHA algorithm. In this algorithm, a random salt is mixed with original password before encryption.

It has been a while since I worked on anything PAM related, but I recently became interested in exploring how to convert the su binary to work with capabilities only, and not require it being setuid-root. Not the answer you're looking for? In the libcap

Connect and share knowledge within a single location that is structured and easy to search. I am reading a book on ethical hacking, and it has some examples in Python which I won't post here unless asked since this isn't Stack Overflow. They can't copy it, open it; etc. Is there some brute force method? I don't know anything about these, where can I learn? In order to understand how a hacker could access this file you have to think like a hacker, mainly outside the box, of what most would consider to be "normal" methods for accessing a file.

Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Explore Teams. Connect and share knowledge within a single location that is structured and easy to search. I am reading a book on ethical hacking, and it has some examples in Python which I won't post here unless asked since this isn't Stack Overflow. They can't copy it, open it; etc. Is there some brute force method? I don't know anything about these, where can I learn? In order to understand how a hacker could access this file you have to think like a hacker, mainly outside the box, of what most would consider to be "normal" methods for accessing a file. I've seen many examples throughout my career where developers or unknowledgeable sysadmins have run applications such as Tomcat or Apache as root. These same methods can be used to augment the permissions on files as well, though a good hacker would not do something so obvious as to be detected, safer to read the contents of these files and stash them somewhere else or retrieve them from the box.

How to access /etc/shadow file without root

It is readable only by the root user or super user. To see this feature in action, access a root shell and run following commands. In Ubuntu Linux, by default root account is disabled. If you are following tutorial on Ubuntu Linux, access a super user shell and run following commands. But when we performed the same action from a root user or super user account, shell allowed to it. This security feature keeps encrypted passwords safe from unauthorized users and password cracking programs. In both files, this field represents login name and stores the exactly same information. When a new user account is created, both files are updated simultaneously.

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Systemd Units Explained with Types and States. This security feature keeps encrypted passwords safe from unauthorized users and password cracking programs. In Ubuntu, by default root account is locked. Please add further details to expand on your answer, such as working code or documentation citations. If require, a user account can be unlocked by setting a password in this field through passwd command. Another problem here is that you gave this right to Nginx , a web server. When a new user account is created, both files are updated simultaneously. Learn more about Teams. In PURE1E mode the su program won't be running as setuid-root , but we want the code to authenticate other users They can't copy it, open it; etc. Our partnership with Google and commitment to socially responsible AI. Not the answer you're looking for?

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This may seem counterproductive, but this is the way all serious systems do such things: they include private secure proxy service which does all security checks and web front end only can talk to this proxy service to have some access to sensitive data or do other sensitive things. Are these steps that I am following correct? Finally, to satisfy the purpose of this article, let's try that all again but in a PURE1E mode of operation. Improve this question. Why do you believe that it's not? BitGen BitGen 8 8 bronze badges. Highest score default Date modified newest first Date created oldest first. Shifting the data dump schedule: A proposal. Since libcap Except Guest post submission, for any other query such as adverting opportunity, product advertisement, feedback, suggestion, error reporting and technical issue or simply just say to hello mail us [email protected].