Executive Summary

This vulnerability exists in the AVTECH EagleEyes 2.0.0 application where a custom X509TrustManager implementation in the method checkServerTrusted only checks the SSL/TLS certificate's expiration date but does not perform full certificate chain validation. This means it does not verify if the certificate is issued by a trusted Certificate Authority or if the chain is valid, allowing attackers to use self-signed or rogue certificates to bypass security checks. [1]

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Impact Analysis

Because the application does not properly validate SSL/TLS certificates, an attacker can perform man-in-the-middle (MITM) attacks by presenting fake certificates. This can lead to interception and potential manipulation of sensitive surveillance data transmitted between the EagleEyes Lite app and its backend server over HTTPS, compromising confidentiality and integrity. [1]

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Detection Guidance

This vulnerability can be detected by analyzing the SSL/TLS certificate validation behavior of the EagleEyes Lite Android application version 2.0.0. Specifically, you can test for acceptance of self-signed or rogue certificates during HTTPS connections to the backend server, indicating improper certificate chain validation. Network monitoring tools like Wireshark can be used to inspect TLS handshakes for suspicious certificates. Additionally, testing with tools such as OpenSSL s_client or custom scripts to present invalid or self-signed certificates to the application and observing if the connection is accepted can help detect the vulnerability. Commands like 'openssl s_client -connect <server>:443 -showcerts' can be used to inspect server certificates, but detection requires testing the client behavior against invalid certificates, which may require a controlled MITM proxy setup (e.g., using mitmproxy) to present rogue certificates and observe if the application accepts them. [1]

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Mitigation Strategies

Immediate mitigation steps include replacing the custom X509TrustManager implementation in the EagleEyes Lite application with the default system implementation that performs full certificate chain validation. Enforce proper hostname verification to ensure certificates match the expected hostnames. Remove or update any insecure fallback logic for legacy Android versions to maintain consistent and secure TLS validation. These steps will prevent acceptance of self-signed or rogue certificates and protect against man-in-the-middle attacks. [1]

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