CVE-2019-19194 Auth bypass in n/a
Attackers can bypass Bluetooth pairing security to read, modify, or crash devices due to a zero long term key vulnerability in the Telink BLE SDK.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-19194?
CVE-2019-19194 is a high-severity authentication bypass vulnerability in n/a, published on 12 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2019-19194?
It affects 5 products.
Products include Telink-Semi Tlsr8232 Ble Sdk, Telink-Semi Tlsr8251 Ble Sdk, Telink-Semi Tlsr8253 Ble Sdk, Telink-Semi Tlsr8258 Ble Sdk, Telink-Semi Tlsr8269 Ble Sdk.
How do I fix CVE-2019-19194?
No fix has been published for CVE-2019-19194 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-19194 being exploited?
There is no known exploitation of CVE-2019-19194 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-98r9-mgjw-46jp.