1/27/2024 0 Comments Openssh 7.6p1 exploit![]() The default SSH port is 22, it’s common to see it open on servers on Internet or Intranets. The box was serving a default apache index with no robots. SSH is a secure remote shell protocol used for operating network services securely over an unsecured network. OpenSSH < 7.7 - User Enumeration (2) - Linux remote Exploit OpenSSH < 7. # Nmap done at Fri Jul 9 02:11:54 2021 - 1 IP address (1 host up) scanned in 13.16 seconds Service Info: OS: Linux CPE: cpe:/o:linux:linux_kernel |_http-title: Apache2 Ubuntu Default Page: It works |_http-server-header: Apache/2.4.29 (Ubuntu) |_ Supported Methods: HEAD GET POST OPTIONS In addition, OpenSSH provides a large suite of secure tunneling capabilities, several authentication methods, and sophisticated configuration options. | 2048 4b:98:df:85:d1:7e:f0:3d:da:48:cd:bc:92:00:b7:54 (RSA) It encrypts all traffic to eliminate eavesdropping, connection hijacking, and other attacks. # Nmap 7.91 scan initiated Fri Jul 9 02:11:41 2021 as: nmap -v -sC -sV -p 80,22 -oN detailed_scan openadmin.htbĢ2/tcp open ssh OpenSSH 7.6p1 Ubuntu 4ubuntu0.3 (Ubuntu Linux protocol 2.0) Then a detailed scan against the 2 found services $ nmap -v -sC -sV -p 80,22 -oN detailed_scan openadmin.htb ![]() # Nmap done at Fri Jul 9 02:08:00 2021 - 1 IP address (1 host up) scanned in 20.27 seconds ![]() Read data files from: /usr/bin/./share/nmap Nmap scan report for openadmin.htb (10.10.10.171) Increasing send delay for 10.10.10.171 from 5 to 10 due to 213 out of 709 dropped probes since last increase. Increasing send delay for 10.10.10.171 from 0 to 5 due to 42 out of 140 dropped probes since last increase. # Nmap 7.91 scan initiated Fri Jul 9 02:07:40 2021 as: nmap -v -oN ports openadmin.htb I first added the machine in my hosts file as openadmin.htb then ran a regular nmap scan to get the open ports $ sudo nmap openadmin.htb -v -oN ports Recently, hackthebox started an event called take it easy, where it made a bunch of retired easy machine accessible to everyone, so here’s my write up for the first box I’ve rooted in the event Reconnaissance Published: 5 March 2021 ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.
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