Vulnerability Details CVE-2020-16630
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 22.2%
CVSS Severity
CVSS v3 Score 6.8
CVSS v2 Score 4.3
References
- http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html
- https://www.usenix.org/system/files/sec20-zhang-yue.pdf
- http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html
- https://www.usenix.org/system/files/sec20-zhang-yue.pdf
Products affected by CVE-2020-16630
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cpe:2.3:a:ti:15.4-stack:-
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cpe:2.3:a:ti:ble5-stack:-
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cpe:2.3:a:ti:dynamic_multi-protocal_manager:-
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cpe:2.3:a:ti:easylink:-
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cpe:2.3:a:ti:openthread:-
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cpe:2.3:a:ti:z-stack:-
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cpe:2.3:o:ti:real-time_operating_system:-