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CVE-2016-6433 is a privilege escalation vulnerability in Cisco Firepower Management Center versions 5.2.0 through 6.0.1. The vulnerability arises from a misconfiguration in the sudoers file, which allows the 'www' user to execute the 'useradd' command with sudo privileges and no password. Additionally, the 'ldapgroup' group in sudoers could execute any command as root, with 'admin' as the default member. An attacker with authenticated access to the management console could exploit this to create new users with root privileges or escalate their privileges to root.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a single Metasploit module (modules/exploits/linux/http/cisco_firepower_useradd.rb) targeting Cisco Firepower Management Console 6.0.1 (build 1213) and exploiting CVE-2016-6433. The exploit requires valid credentials for the management console (default: admin/Admin123). It abuses a configuration flaw that allows the web user to execute the useradd binary, enabling the creation of a new backdoor user account. The module first authenticates to the web interface, then leverages the rules import functionality to execute a command that creates a new user with a specified or random username and password. After the user is created, the module establishes an SSH session as the new user and executes a payload using a command stager (default: echo-based shell commands). The exploit is operational and provides attackers with persistent SSH access and arbitrary command execution on the target system. The main network endpoints involved are the web interface (HTTPS, typically port 443) and SSH (port 22). The code is well-structured, leverages Metasploit's HTTP and SSH libraries, and is suitable for post-authentication exploitation.
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