antMan 0.9.0c – Authentication Bypass
# Exploit Title: antMan <= 0.9.0c Authentication Bypass # Date: 02-27-2018 # Software Link: https://www.antsle.com # Version: <= 0.9.0c # Tested on: 0.9.0c # Exploit Author: Joshua Bowser # Contact: joshua.bowser@codecatoctin.com # Website: http://www.codecatoctin.com # Category: web apps 1. Description antMan versions <= 0.9.c contain a critical authentication defect, allowing an unauthenticated attacker to obtain root permissions within the antMan web management console. http://blog.codecatoctin.com/2018/02/antman-authentication-bypass.html 2. Proof of Concept The antMan authentication implementation obtains user-supplied username and password parameters from a POST request issued to /login. Next, antMan utilizes Java’s ProcessBuilder class to invoke, as root, a bash script called antsle-auth. This script contains two critical defects that allow an attacker to bypass the authentication checks. By changing the username to > and the password to a url-encoded linefeed (%0a), we can force the authentication script to produce return values not anticipated by the developer. To exploit these defects, use a web proxy to intercept the login attempt and modify the POST parameters as follows: #------------------------- POST /login HTTP/1.1 Host: 10.1.1.7:3000 [snip] username= > &password=%0a #------------------------- You will now be successfully authenticated to antMan as the administrative root user. 3. Solution: Update to version 0.9.1a |