Android 6.0 has an authentication bypass for attackers with root and physical access. Cryptographic authentication tokens (AuthTokens) used by the Trusted Execution Environment (TEE) are protected by a weak challenge. This allows adversaries to replay previously captured responses and use the TEE without authenticating. All apps using authentication-gated cryptography are vulnerable to this attack, which was confirmed on the LG Nexus 5X.
CVSS Details
- CVSS 3.0 Base Score: 6.2
- CVSS 3.0 Vector: (CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
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