CVE-2016-10398

low-risk
Published 2017-07-17

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.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.2/10 Medium
PHYSICAL / LOW complexity

Affected Products (1)

Affected Vendors

Google

References (2)

Technical Description https://homepages.staff.os3.nl/~delaat/rp/2015-2016/p30/report.pdf
Technical Description https://homepages.staff.os3.nl/~delaat/rp/2015-2016/p30/report.pdf
25
/ 100
low-risk
Severity 20/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal