Auth bypass in Microchip Bm70
CVE-2022-46400
The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) allows attackers to bypass passkey entry in legacy pairing.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (49.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Microchip Bm70
- Microchip Bm70 Firmware — versions 1.43
- Microchip Bm71
- Microchip Bm71 Firmware — versions 1.43
- Microchip Bm78
- Microchip Bm78 Firmware — versions 1.43
- Microchip Bm83
- Microchip Bm83 Firmware — versions 1.43
- Microchip Is1870
- Microchip Is1870 Firmware — versions 1.43
Weakness classification (CWE)
References
- www.computer.org/csdl/proceedings/sp/2023/1He7WWuJExG (Third Party Advisory)
- www.computer.org/csdl/proceedings-article/sp/2023/933600a521/1He7Yja1AYM (Technical Description, Exploit, Third Party Advisory)
- microchip.com (Product)
- www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-r… (Vendor Advisory)
Frequently asked questions
- What is CVE-2022-46400?
- CVE-2022-46400 is a medium-severity vulnerability in Microchip Bm70, classified under Improper Authentication. CVSS score: 5.4/10. Published 2022-12-19.
- How severe is CVE-2022-46400?
- Medium severity. CVSS v3 base score is 5.4 out of 10.