CVE-2019-13916

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.

CVSS v3.0 8.8 HIGH
CVSS v2.0 5.8 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:A/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 6.5 / Impact : 6.4

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/seemoo-lab/frankenstein/blob/master/doc/CVE_2019_13916.md	Exploit Third Party Advisory
https://community.cypress.com/thread/53681	Permissions Required Vendor Advisory

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:cypress:wiced_studio:6.2:*:*:*:*:*:*:*

OR	cpe:2.3:h:cypress:cyw20735b1:-:::::::*
	cpe:2.3:h:cypress:cyw20819a1:-:::::::*

Information

Published : 2020-04-13 10:15

Updated : 2020-04-22 10:45

NVD link : CVE-2019-13916

Mitre link : CVE-2019-13916

JSON object : View

CWE

CWE-787

Out-of-bounds Write

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Products Affected

cypress

wiced_studio
cyw20735b1
cyw20819a1

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