Defeating Certificate Pinning

[Cyberizm]

Objective-C:​

Vulnerable Code:

NSString *certificatePinningCode = @"[self validateCertificate];";
[self executeCode:certificatePinningCode];
Description: This vulnerable code directly executes a method validateCertificate which performs certificate pinning. An attacker could modify or bypass this method, undermining the security mechanism.

Patched Code:

#ifdef DEBUG
NSString *certificatePinningCode = @"[self validateCertificate];";
[self executeCode:certificatePinningCode];
#endif
Description: The patched code conditionally executes the certificate pinning validation code only in debug mode. This ensures that certificate pinning is bypassed only during development and testing, reducing the risk of an attack in production environments.

Swift:

Vulnerable Code:

let certificatePinningCode = "[self validateCertificate()]"
executeCode(code: certificatePinningCode)
Description: Similarly, this Swift code directly executes the validateCertificatemethod, exposing the application to potential attacks if the pinning mechanism is bypassed.

Patched Code:

#ifdef DEBUG
let certificatePinningCode = "[self validateCertificate()]"
executeCode(code: certificatePinningCode)
#endif
Description: The patched Swift code applies the same conditional execution strategy as the Objective-C version, ensuring that certificate pinning validation is only executed in debug mode, thus mitigating the risk of attacks in production environments.





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