Resource exhaustion in Actions-Semi Ats2815
CVE-2021-31787
The Bluetooth Classic implementation on Actions ATS2815 chipsets does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and shutdown of a device by flooding the target device with LMP_features_res packets.
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 (41.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.actions-semi.com/index.php (Vendor Advisory)
- launchstudio.bluetooth.com/ListingDetails/76427 (Third Party Advisory)
- dl.packetstormsecurity.net/papers/general/braktooth.pdf (Broken Link)
Frequently asked questions
- What is CVE-2021-31787?
- CVE-2021-31787 is a medium-severity vulnerability in Actions-Semi Ats2815, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2021-11-30.
- How severe is CVE-2021-31787?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-31787 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.