CVE-2019-13916
First published: Mon Apr 13 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cypress Wiced Studio | =6.2 | |
| Cypress Cyw20735b1 | ||
| Cypress Cyw20819a1 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-13916.
What is the severity of CVE-2019-13916?
CVE-2019-13916 has a severity rating of 8.8 (high).
What is the affected software for CVE-2019-13916?
The affected software for CVE-2019-13916 is Cypress (formerly Broadcom) WICED Studio 6.2.
How does the vulnerability in CVE-2019-13916 occur?
The vulnerability in CVE-2019-13916 occurs when a Bluetooth Low Energy (BLE) packet is received and copied into a buffer that is too small.
Are Cypress Cyw20735b1 and Cyw20819a1 vulnerable to CVE-2019-13916?
No, Cypress Cyw20735b1 and Cyw20819a1 are not vulnerable to CVE-2019-13916.
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