Auth bypass in Bluetooth Mesh Profile
CVE-2020-26559
Bluetooth Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (participating in the provisioning protocol) to identify the AuthValue used given the Provisioner’s public key, and the confirmation number and nonce provided by the provisioning device. This could permit a device without the AuthValue to complete provisioning without brute-forcing the AuthValue.
Vulnerability class: Broken Access Control
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: 0.009 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Bluetooth Mesh Profile — versions 1.0.0, 1.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/repor… (Vendor Advisory)
- kb.cert.org/vuls/id/799380 (US Government Resource, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2020-26559?
- CVE-2020-26559 is a high-severity vulnerability in Bluetooth Mesh Profile, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2021-05-24.
- How severe is CVE-2020-26559?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-26559 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.