EDB-ID: 44262 | Author: Joshua Bowser | Published: 2018-03-07 | CVE: CVE-2018-7739 | Type: Webapps | Platform: Java | Vulnerable App: N/A | # Date: 02-27-2018
# 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
