CVE-2020-16630
Last modified
CVE-2020-16630 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.67% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 | Z-Stack | All versions |
| Ti | Real-Time Operating System | All versions |
References
- https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploit, Third Party Advisory
- https://www.usenix.org/system/files/sec20-zhang-yue.pdfExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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