Vulnerability in Ti Cc256xcqfn-Em
CVE-2021-34149
The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.
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 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% 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.ti.com/tool/CC256XC-BT-SP (Product, Vendor Advisory)
- www.ti.com/product/CC2564C (Product, Vendor Advisory)
- dl.packetstormsecurity.net/papers/general/braktooth.pdf (Technical Description, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34149?
- CVE-2021-34149 is a medium-severity vulnerability in Ti Cc256xcqfn-Em. CVSS score: 6.5/10. Published 2021-09-07.
- How severe is CVE-2021-34149?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-34149 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.