0x01 描述：漏洞编号：CVE-2016-5195漏洞名称：脏牛（Dirty COW）漏洞危害：低权限用户利用该漏洞技术可以在全版本Linux系统上实现本地提权影响范围：Linux内核>=2.6.22（2007年发行）开始就受影响了，直到2016年10月18日才修复 0x02 原理：Linux内核的内存子系统在处理写入时复制（copy-on-write, COW）时产生了 ...
Directory traversal allows an attacker to exploit security misconfigurations in an attempt to view or modify sensitive information. This is one of the simpler attacks to perform, but the results can be disastrous, particularly if personal or financial data is gleaned or if critical information about the server is compromised and used as a pivot point.
Oct 23, 2016 · Since I knew that script gets the job done in 4 iterations itself, so I didn't wait for more than that. Now time to check the passwd file. Superb :) so "superb" is now a new user. Lets switch to it. Hahaha, Game Over buddy. There are lot many other vulnerabilities too, like phpmyadmin (guessable password), DVWA etc... You can hit them one by one.
Sep 29, 2020 · The /etc/passwd is a plain text file. It contains a list of the system’s accounts, giving for each account some useful information like user ID, group ID, home directory, shell, and more. The /etc/passwd file should have general read permission as many command utilities use it to map user IDs to user names.
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Edit: Hm alright local exploits, doesn't affect our use-case as much. Could have though and could Accessing /etc/passwd in read/write is normal behaviour for those tools and thus part of the policy.
Jul 03, 2020 · In this deep down online world, dynamic web-applications are the ones that can easily be breached by an attacker due to their loosely written server-side codes and misconfigured system files. Today, we will learn about File Inclusion, which is considered as one of the most critical vulnerability that somewhere allows an attacker to manipulate the... Continue reading →
In ye Early Days of Unix, password hashes were stored in /etc/passwd. As computers got more powerful, network connections more persistent and security exploits more sophisticated, people realized that keeping password hashes word-readable was asking for trouble. (I won't detail the exploits; there's enough good answers about that already.)
polkitd exploit, This exploit is known to work on polkit-1 <= 0.101. However, Ubuntu, which as of writing uses 0.101, has backported 0.102's bug fix. A way to check this is by looking at the mtime of /usr/bin/pkexec -- April 19, 2011 or later and you're out of luck.