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GHSA-c967-2652-gfjm
No affected components available
Summary
The Casa OS Login page has disclosed the username enumeration vulnerability in the login page.
Details
It is observed that the attacker can enumerate the CasaOS username using the application response. If the username is incorrect application gives the error "User does not exist", If the password is incorrect application gives the error "Invalid password".
PoC
Capture the login request in a tool like Burp Suit and use the intruder tab for trying multiple usernames. Keep checking the response of each request if the response says Invalid password then the username is right.
Impact
Using this error attacker can enumerate the username of CasaOS.
The logic behind the issue
If the username is incorrect, then throw an error "User does not exist" else throw an error "Invalid password".
This condition can be vice versa like:
If the password is incorrect, then throw an error "Invalid password" else throw an error "User does not exist".
Mitigation
Since this is the condition we have to implement a single error which can be "Username/Password is Incorrect!!!"
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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