CVE-2020-13595

low-risk
Published 2020-08-31

The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.0 through 4.2 (for ESP32 devices) returns the wrong number of completed BLE packets and triggers a reachable assertion on the host stack when receiving a packet with an MIC failure. An attacker within radio range can silently trigger the assertion (which disables the target's BLE stack) by sending a crafted sequence of BLE packets.

Do I need to act?

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0.24% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
ADJACENT_NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Espressif

References (6)

Third Party Advisory https://asset-group.github.io/cves.html
Third Party Advisory https://asset-group.github.io/disclosures/sweyntooth/
Third Party Advisory https://github.com/espressif/esp32-bt-lib
Third Party Advisory https://asset-group.github.io/cves.html
Third Party Advisory https://asset-group.github.io/disclosures/sweyntooth/
Third Party Advisory https://github.com/espressif/esp32-bt-lib
27
/ 100
low-risk
Severity 21/34 · High
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal