Vulnerability in Silabs Iwrap
CVE-2021-31609
The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i 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: 0.004 (32.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- www.silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a (Product, Vendor Advisory)
- dl.packetstormsecurity.net/papers/general/braktooth.pdf (Technical Description, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31609?
- CVE-2021-31609 is a medium-severity vulnerability in Silabs Iwrap. CVSS score: 6.5/10. Published 2021-09-07.
- How severe is CVE-2021-31609?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-31609 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.