Liveness face authentication bypass - lack of valitadion

2019-05-15 / 2019-05-21
Risk: High
Local: No
Remote: Yes
CWE: CWE-287

CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

The Face authentication component in Aware mobile liveness 2.2.1 sdk 2.2.0 for Knomi allows a Biometrical Liveness authentication bypass via parameter tampering of the /knomi/analyze security_level dropping it down and getting an approval score (100%) back from the server. The exploitation is also possible reverse engineering the sdk base changing the security_level parameter to achieve the OK from the server. The server does not properly validate the value sent by the SDK. [Vendor of Product] Aware - Exploit:

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