CVE-2019-19194
Description
The Bluetooth Low Energy Secure Manager Protocol (SMP) implementation on Telink Semiconductor BLE SDK versions before November 2019 for TLSR8x5x through 3.4.0, TLSR823x through 1.3.0, and TLSR826x through 3.3 devices installs a zero long term key (LTK) if an out-of-order link-layer encryption request is received during Secure Connections pairing. An attacker in radio range can have arbitrary read/write access to protected GATT service data, cause a device crash, or possibly control a device's function by establishing an encrypted session with the zero LTK.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- Telink Semiconductor/BLE SDKdescription
- Range: <=3.4.0
- Range: <2019-11 for TLSR8x5x <=3.4.0, TLSR823x <=1.3.0, TLSR826x <=3.3
Patches
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
2- www.telink-semi.com/blemitrex_refsource_MISC
- asset-group.github.io/disclosures/sweyntooth/mitrex_refsource_MISC
News mentions
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