Biometric Authentication Bypass in Dropbox App for iOS

CVE-2018-12271

What is CVE-2018-12271?

A security issue in the Dropbox app for iOS (version 100.2) enables an attacker to bypass biometric authentication via the LAContext class. This occurs because the kSecAccessControlUserPresence method is not utilized, leading to the potential for unauthorized access with a falsified 'true' return value for authentication. While the vendor has stated that this vulnerability is not within the scope of their threat model, it poses a risk on jailbroken iOS devices where the standard security mechanisms are compromised.

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