CVE-2017-9565 in App
Summary
by MITRE
The first-security-bank-sleepy-eye-mobile/id870531890 app 3.0.0 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 • 10/18/2019
The vulnerability identified as CVE-2017-9565 affects the first-security-bank-sleepy-eye-mobile iOS application version 3.0.0, representing a critical flaw in the mobile banking security architecture that undermines fundamental cryptographic protections. This issue manifests as a complete failure to validate X.509 certificates during SSL/TLS communications, creating an exploitable condition that directly violates established security protocols. The absence of certificate verification creates a pathway for sophisticated attackers to execute man-in-the-middle attacks against legitimate users of the mobile banking application.
The technical flaw resides in the application's implementation of secure communication protocols where the iOS mobile banking client fails to perform proper certificate chain validation and trust verification. This weakness allows attackers to present fraudulent certificates that appear legitimate to the application, effectively bypassing the entire SSL/TLS security framework designed to protect sensitive financial data transmission. The vulnerability specifically targets the certificate validation mechanism that should ensure server authenticity and data integrity during network communications, leaving users exposed to credential theft, financial transaction manipulation, and sensitive data interception.
From an operational perspective, this vulnerability poses severe risks to both individual users and the financial institution's security posture. Attackers can exploit this flaw to intercept and modify financial transactions, steal user credentials, and access confidential banking information without detection. The impact extends beyond immediate financial loss to include reputational damage, regulatory compliance violations, and potential legal consequences for the institution. The vulnerability affects all users of the mobile banking application who conduct transactions over networks where attackers can intercept traffic, making it particularly dangerous in public Wi-Fi environments or compromised network infrastructures.
The security implications of this vulnerability align with CWE-295, which addresses improper certificate validation, and maps to ATT&CK technique T1041 for data encryption for exfiltration. Organizations should implement immediate mitigations including certificate pinning, enhanced certificate validation routines, and comprehensive security testing of mobile applications. The recommended remediation involves implementing proper SSL certificate validation mechanisms that verify certificate chains against trusted Certificate Authorities, implementing certificate pinning to prevent substitution attacks, and conducting regular security assessments to identify similar vulnerabilities. Additionally, the institution should consider deploying network monitoring solutions to detect and respond to potential exploitation attempts while ensuring compliance with financial services security standards such as PCI DSS and NIST guidelines for mobile application security.