CVE-2017-8937 in Life Before Us Yo App
Summary
by MITRE
The Life Before Us Yo app 2.5.8 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
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Analysis
by VulDB Data Team • 09/26/2020
The vulnerability identified as CVE-2017-8937 affects the Life Before Us Yo application version 2.5.8 on iOS platforms, representing a critical security flaw in the application's implementation of secure communication protocols. This issue stems from the application's failure to properly validate X.509 certificates during SSL/TLS connections, creating a significant attack vector that undermines the fundamental security guarantees of encrypted communications. The flaw directly impacts the app's ability to establish trust with remote servers, leaving users vulnerable to sophisticated man-in-the-middle attacks that can compromise sensitive data transmission.
The technical nature of this vulnerability places it firmly within the domain of certificate validation failures, specifically categorized under CWE-295 which addresses improper certificate validation. The application's inability to verify SSL certificates means that it accepts any certificate presented by a server without proper authentication, effectively disabling the cryptographic security measures designed to protect data integrity and confidentiality. This weakness allows attackers to establish fraudulent connections with the application by presenting maliciously crafted certificates that appear legitimate to the vulnerable client, thereby bypassing the standard certificate chain validation processes that are essential for secure communication.
From an operational standpoint, this vulnerability creates severe implications for user data protection and privacy. Attackers can exploit this flaw to intercept, modify, or steal sensitive information transmitted between the iOS application and its backend servers. The man-in-the-middle attack capability enables threat actors to eavesdrop on communications, inject malicious content, or redirect users to fraudulent endpoints while maintaining the appearance of legitimate service delivery. This vulnerability particularly affects applications handling personal information, authentication credentials, or sensitive user data, making it a prime target for cybercriminals seeking to exploit user trust in the application.
The security implications of CVE-2017-8937 align with tactics described in the MITRE ATT&CK framework under the T1046 technique for network service scanning and T1566 for credential harvesting through social engineering. The vulnerability's exploitation pathway directly enables attackers to perform session hijacking and data exfiltration operations, potentially compromising user accounts and sensitive business information. Organizations relying on similar applications may face regulatory compliance issues and reputational damage if such vulnerabilities are exploited in real-world scenarios, as they represent a failure to implement basic security hygiene measures that are fundamental to protecting user data.
Mitigation strategies for this vulnerability require immediate implementation of proper certificate validation mechanisms within the application's networking stack. Developers must ensure that all SSL/TLS connections perform thorough certificate chain validation, including checking certificate expiration dates, verifying certificate authorities, and implementing certificate pinning where appropriate. The fix should incorporate standard cryptographic libraries that properly validate X.509 certificates according to established security protocols and industry best practices. Additionally, regular security audits and penetration testing should be conducted to identify similar validation weaknesses in other applications and ensure that certificate verification processes remain robust against emerging attack techniques. Organizations should also implement monitoring solutions to detect anomalous network traffic patterns that may indicate exploitation attempts against vulnerable applications.