antMan 0.9.0c - Authentication Bypass Vulnerability

# Exploit Title: antMan <= 0.9.0c Authentication Bypass
# Software Link: https://www.antsle.com
# Version: <= 0.9.0c
# Tested on: 0.9.0c
# Exploit Author: Joshua Bowser
# Contact: [email protected]
# 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

#  0day.today [2018-03-14]  #