CVE-2019-13916

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Cypress (formerly Broadcom) WICED Studio 6.2 CYW20735B1 and CYW20819A1. As a Bluetooth Low Energy (BLE) packet is received, it is copied into a Heap (ThreadX Block) buffer. The buffer allocated in dhmulp_getRxBuffer is four bytes too small to hold the maximum of 255 bytes plus headers. It is possible to corrupt a pointer in the linked list holding the free buffers of the g_mm_BLEDeviceToHostPool Block pool. This pointer can be fully controlled by overflowing with 3 bytes of packet data and the first byte of the packet CRC checksum. The checksum can be freely chosen by adapting the packet data accordingly. An attacker might be able to allocate the overwritten address as a receive buffer resulting in a write-what-where condition. This is fixed in BT SDK2.4 and BT SDK2.45.

Se detectó un problema en Cypress (anteriormente Broadcom) WICED Studio versión 6.2 CYW20735B1 y CYW20819A1. Cuando un paquete Bluetooth Low Energy (BLE) es recibido, es copiado en un búfer Heap (ThreadX Block). El búfer asignado en dhmulp_getRxBuffer es cuatro bytes mas pequeño para contener el máximo de 255 bytes más encabezados. Es posible corromper un puntero en la lista vinculada contenedora de los búferes libres del grupo Block g_mm_BLEDeviceToHostPool. Este puntero puede ser controlado completamente al desbordar con 3 bytes del paquete de datos y el primer byte de la suma de comprobaciones CRC del paquete. La suma de comprobaciones puede ser elegida libremente al adaptar los datos del paquete en consecuencia. Un atacante podría ser capaz de asignar la dirección sobrescrita como un búfer de recepción, resultando en una condición write-what-where. Esto se corrigió en BT SDK2.4 y BT SDK2.45.

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-07-18 CVE Reserved
2020-04-13 CVE Published
2023-08-17 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://github.com/seemoo-lab/frankenstein/blob/master/doc/CVE_2019_13916.md	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cypress Search vendor "Cypress"	Wiced Studio Search vendor "Cypress" for product "Wiced Studio"	6.2 Search vendor "Cypress" for product "Wiced Studio" and version "6.2"	-	Affected	in	Cypress Search vendor "Cypress"	Cyw20735b1 Search vendor "Cypress" for product "Cyw20735b1"	-	-	Safe
Cypress Search vendor "Cypress"	Wiced Studio Search vendor "Cypress" for product "Wiced Studio"	6.2 Search vendor "Cypress" for product "Wiced Studio" and version "6.2"	-	Affected	in	Cypress Search vendor "Cypress"	Cyw20819a1 Search vendor "Cypress" for product "Cyw20819a1"	-	-	Safe