Vulnerability Details : CVE-2019-19194
Potential exploit
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.
Products affected by CVE-2019-19194
- cpe:2.3:a:telink-semi:tlsr8258_ble_sdk:*:*:*:*:*:*:*:*
- cpe:2.3:a:telink-semi:tlsr8269_ble_sdk:*:*:*:*:*:*:*:*
- cpe:2.3:a:telink-semi:tlsr8253_ble_sdk:*:*:*:*:*:*:*:*
- cpe:2.3:a:telink-semi:tlsr8251_ble_sdk:*:*:*:*:*:*:*:*
- cpe:2.3:a:telink-semi:tlsr8232_ble_sdk:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-19194
1.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-19194
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:A/AC:L/Au:N/C:P/I:P/A:P |
6.5
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
References for CVE-2019-19194
-
http://www.telink-semi.com/ble
ble.png (150×150)Vendor Advisory
-
https://asset-group.github.io/disclosures/sweyntooth/
ASSET Research Group: SweynToothExploit;Third Party Advisory
Jump to