Buffer overflow in Cypress Cybl11573
CVE-2019-16336
The Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component 3.61 and earlier processes data channel frames with a payload length larger than the configured link layer maximum RX payload size, which allows attackers (in radio range) to cause a denial of service (crash) via a crafted BLE Link Layer frame.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (72.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- community.cypress.com/thread/48573 (Vendor Advisory)
- asset-group.github.io/disclosures/sweyntooth/ (Exploit, Third Party Advisory)
- www.youtube.com/watch (Exploit, Third Party Advisory)
- community.cypress.com/thread/53680 (Vendor Advisory)
Frequently asked questions
- What is CVE-2019-16336?
- CVE-2019-16336 is a medium-severity vulnerability in Cypress Cybl11573, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2020-02-12.
- How severe is CVE-2019-16336?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2019-16336 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.