Vulnerability in Zh-Jieli Ac6901
CVE-2021-31612
The Bluetooth Classic implementation on Zhuhai Jieli AC690X devices does not properly handle the reception of an oversized LMP packet greater than 17 bytes during the LMP auto rate procedure, allowing attackers in radio range to trigger a deadlock via a crafted LMP packet.
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: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- www.zh-jieli.com/product/68-cn.html (Product, Vendor Advisory)
- launchstudio.bluetooth.com/ListingDetails/19746 (Third Party Advisory)
- dl.packetstormsecurity.net/papers/general/braktooth.pdf (Broken Link)
Frequently asked questions
- What is CVE-2021-31612?
- CVE-2021-31612 is a medium-severity vulnerability in Zh-Jieli Ac6901. CVSS score: 6.5/10. Published 2021-09-07.
- How severe is CVE-2021-31612?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-31612 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.