Reversible ecos_pw Cookie Allows Authentication Bypass in Nexxt Nebula 300+
Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 uses the ecos_pw cookie for authentication, which contains Base64-encoded credential data combined with a static suffix. Because the encoding is reversible and lacks integrity protection, an attacker can reconstruct or forge a valid cookie value without proper authentication. This allows unauthorized administrative access to protected endpoints.
An attacker who obtains or reconstructs the ecos_pw cookie value can authenticate as an administrator and gain unauthorized access to the device.
CAPEC ID: N/A
Description: An attacker who obtains or reconstructs the ecos_pw cookie value can authenticate as an administrator and gain unauthorized access to the device.