PT-2020-9865 · Cypress · Cypress Psoc

Published 2020-02-10 · Updated 2022-01-01 · CVE-2019-17061

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cypress PSoC devices versions 4 through 3.62

Description The issue concerns the Bluetooth Low Energy (BLE) stack implementation, which does not properly restrict the BLE Link Layer header. This allows attackers within radio range to cause issues by sending a crafted BLE Link Layer frame with a Link Layer ID (LLID) equal to zero. As a result, attackers can cause deadlocks, anomalous behavior in the BLE state machine, or trigger a buffer overflow.

Recommendations For Cypress PSoC devices versions 4 through 3.62, consider disabling the BLE functionality until a patch is available to prevent potential exploitation. Restrict access to the BLE Link Layer to minimize the risk of anomalous behavior or buffer overflows. Avoid using the LLID variable in the BLE Link Layer frame until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2019-17061

Affected Products

Cypress Psoc

References · 5

• https://cypress.com/products/ble-bluetooth · Vendor Advisory
• https://community.cypress.com/thread/53680 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-17061 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-17061 · Security Note
• https://asset-group.github.io/disclosures/sweyntooth · Note