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Date: Thu, 20 Jun 2019 12:13:19 +0000
From: xen1thLabs <>
To: "" <>
Subject: [FD] XL-19-010 - ABB IDAL HTTP Server Authentication Bypass

XL-19-010 - ABB IDAL HTTP Server Authentication Bypass Vulnerability


CVSS Score
8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected vendor

Eldar Marcussen - xen1thLabs - Software Labs

Vulnerability summary
The IDAL HTTP server CGI interface contains a URL, which allows an unauthenticated attacker to bypass authentication and gain access to privileged functions.

Technical details
In the IDAL CGI interface, there is a URL (/cgi/loginDefaultUser), which will create a session in an authenticated state and return the session ID along with the username and plaintext password of the user. An attacker can then login with the provided credentials or supply the string 'IDALToken=......' in a cookie which will allow them to perform privileged operations such as restarting the service with /cgi/restart.

Proof of concept
GET http://localhost:81/cgi/loginDefaultUser


Affected systems
PB610 Panel Builder 600, order code: 1SAP500900R0101, versions 1.91 ...

Apply the patches and instructions from vendor:
  - ABB PB610 -

Disclosure timeline
04/02/2019 - Contacted ABB requesting disclosure coordination
05/02/2019 - Provided vulnerability details
05/06/2019 - Patch available
17/06/2019 - xen1thLabs public disclosure

Sent through the Full Disclosure mailing list
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