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medium6.8

CVE-2020-16630

TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile.

Impact

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

VendorProductAffected versions
Ti15.4-Stack
All versions
TiBle5-Stack
All versions
TiDynamic Multi-Protocal Manager
All versions
TiEasylink
All versions
TiOpenthread
All versions
TiZ-Stack
All versions
TiReal-Time Operating System
All versions

Weakness classification

CWE-863

References