HMS Networks Ewon Flexy with firmware before 15.0s4, Cosy+ with firmware 22.xx before 22.1s6, and Cosy+ with firmware 23.xx before 23.0s3 have weak entropy for authentication cookies, allowing an attacker with a stolen session cookie to find the user password by brute-forcing an encryption parameter.
Weakness
The product stores sensitive information in cleartext in a cookie.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/31.html
- https://cwe.mitre.org/data/definitions/37.html
- https://cwe.mitre.org/data/definitions/39.html
- https://cwe.mitre.org/data/definitions/74.html