CVE-2020-16630

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-20 · updated 2026-06-17
Weakness: CWE-863

Description

TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile. A LTK can be an unauthenticated-and-no-MITM-protection key created by Just Works or an authenticated-and-MITM-protection key created by Passkey Entry, Numeric Comparison or OOB. Assume that a victim mobile uses secure pairing to pair with a victim BLE device based on TI chips and generate an authenticated-and-MITM-protection LTK. If a fake mobile with the victim mobile’s MAC address uses Just Works and pairs with the victim device, the generated LTK still has the property of authenticated-and-MITM-protection. Therefore, the fake mobile can access attributes with the authenticated read/write permission.

Affected products

Ti 15.4-Stack: all versions
Ti Ble5-Stack: all versions
Ti Dynamic Multi-Protocal Manager: all versions
Ti Easylink: all versions
Ti Openthread: all versions
Ti Real-Time Operating System: all versions
Ti Z-Stack: all versions

References

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