CVE-2020-16630 — MEDIUM (6.8)

Vulnerability 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.

CVSS Score

6.8

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

ADJACENT_NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Ti	15.4-Stack	-
Ti	Ble5-Stack	-
Ti	Dynamic Multi-Protocal Manager	-
Ti	Easylink	-
Ti	Openthread	-
Ti	Z-Stack	-
Ti	Real-Time Operating System	-

Related Weaknesses (CWE)

CWE-863

References

http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/eVendor Advisory
https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploitThird Party Advisory
http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/eVendor Advisory
https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploitThird Party Advisory

FAQ

What is CVE-2020-16630?

CVE-2020-16630 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 cr...

How severe is CVE-2020-16630?

CVE-2020-16630 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-16630?

Check the references section above for vendor advisories and patch information. Affected products include: Ti 15.4-Stack, Ti Ble5-Stack, Ti Dynamic Multi-Protocal Manager, Ti Easylink, Ti Openthread.