Longse model LBH30FE200W cameras, as well as products based on this device, make use of telnet passwords which follow a specific pattern. Once the pattern is known, brute-forcing the password becomes relatively easy. Additionally, every camera with the same firmware version shares the same password.
The product uses weak credentials (such as a default key or hard-coded password) that can be calculated, derived, reused, or guessed by an attacker.
By design, authentication protocols try to ensure that attackers must perform brute force attacks if they do not know the credentials such as a key or password. However, when these credentials are easily predictable or even fixed (as with default or hard-coded passwords and keys), then the attacker can defeat the mechanism without relying on brute force. Credentials may be weak for different reasons, such as:
Even if a new, unique credential is intended to be generated for each product installation, if the generation is predictable, then that may also simplify guessing attacks.