Vulnerability in Espressif Esp32
CVE-2021-28139
The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (71.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- github.com/espressif/esp-idf (Product, Third Party Advisory)
- github.com/espressif/esp32-bt-lib (Product, Third Party Advisory)
- www.espressif.com/en/products/socs/esp32 (Product, Vendor Advisory)
- dl.packetstormsecurity.net/papers/general/braktooth.pdf (Technical Description, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28139?
- CVE-2021-28139 is a high-severity vulnerability in Espressif Esp32. CVSS score: 8.8/10. Published 2021-09-07.
- How severe is CVE-2021-28139?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-28139 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.