Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2019-19194

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/02/2020
Last modified:
24/08/2020

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.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH
Vector 2.0
AV:A/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.80 MEDIUM
Vector: AV:A/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
5.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:telink-semi:tlsr8258_ble_sdk:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:telink-semi:tlsr8258:-:*:*:*:*:*:*:*
cpe:2.3:a:telink-semi:tlsr8269_ble_sdk:*:*:*:*:*:*:*:* 3.3 (including)
cpe:2.3:h:telink-semi:tlsr8269:-:*:*:*:*:*:*:*
cpe:2.3:a:telink-semi:tlsr8253_ble_sdk:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:telink-semi:tlsr8253:-:*:*:*:*:*:*:*
cpe:2.3:a:telink-semi:tlsr8251_ble_sdk:*:*:*:*:*:*:*:* 3.4.0 (including)
cpe:2.3:h:telink-semi:tlsr8251:-:*:*:*:*:*:*:*
cpe:2.3:a:telink-semi:tlsr8232_ble_sdk:*:*:*:*:*:*:*:* 1.3.0 (including)
cpe:2.3:h:telink-semi:tlsr8232:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools