CVE-2020-6091 in EB-1470Ui
Summary
by MITRE
An exploitable authentication bypass vulnerability exists in the ESPON Web Control functionality of Epson EB-1470Ui MAIN: 98009273ESWWV107 MAIN2: 8X7325WWV303. A specially crafted series of HTTP requests can cause authentication bypass resulting in information disclosure. An attacker can send an HTTP request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 05/22/2020
The vulnerability identified as CVE-2020-6091 represents a critical authentication bypass flaw within the ESPON Web Control functionality of specific Epson projector models including the EB-1470Ui. This weakness resides in the web interface authentication mechanism that governs access to administrative functions and sensitive system information. The vulnerability affects firmware versions 98009273ESWWV107 and 8X7325WWV303, indicating a targeted issue within specific production batches of Epson network-enabled projectors. The flaw allows an unauthenticated attacker to bypass the standard authentication process through carefully crafted HTTP request sequences, thereby gaining unauthorized access to system controls and potentially sensitive data.
The technical implementation of this vulnerability stems from insufficient input validation and authentication checks within the web control interface. When the system processes HTTP requests containing malformed or specially constructed parameters, it fails to properly validate user credentials or session tokens before granting access to administrative functions. This authentication bypass occurs at the application layer where the web server component handles user requests without adequate verification of authorization status. The vulnerability can be exploited through a series of coordinated HTTP requests that manipulate the authentication flow, effectively allowing attackers to access restricted resources that should normally require valid credentials. This flaw aligns with CWE-287 which addresses improper authentication issues, and represents a classic example of weak session management combined with insufficient access control validation.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential information disclosure and system compromise. An attacker who successfully exploits this vulnerability can access sensitive system information including network configuration details, user credentials, and potentially other system parameters that could facilitate further attacks. The exposure of administrative controls through this bypass could enable attackers to modify system settings, install malicious firmware, or redirect network traffic. This vulnerability particularly affects enterprise environments where Epson projectors are deployed in conference rooms, educational facilities, or other locations where network-accessible devices may be exposed to untrusted network segments. The risk is amplified when these devices are not properly isolated within secure network zones, potentially allowing lateral movement and privilege escalation attacks.
Organizations should immediately implement mitigations including firmware updates from Epson to address the authentication bypass vulnerability, network segmentation to isolate affected devices, and implementation of network access controls to restrict HTTP access to authorized personnel only. The use of intrusion detection systems to monitor for suspicious HTTP request patterns and unauthorized access attempts should also be considered. Additionally, administrators should conduct comprehensive inventory checks to identify all affected Epson projector models and ensure proper patch management procedures are in place. This vulnerability demonstrates the critical importance of maintaining up-to-date firmware and implementing proper network security controls for IoT devices, particularly those with web-based management interfaces. The exploitation of such vulnerabilities can lead to broader security incidents including potential data breaches, system compromise, and unauthorized network access that could impact enterprise security posture.