Vulnerability Details : CVE-2020-26556
Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.
Products affected by CVE-2020-26556
- Bluetooth » Bluetooth Core SpecificationVersions from including (>=) 1.0b and up to, including, (<=) 5.2cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:*
- cpe:2.3:a:bluetooth:mesh_profile:1.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:bluetooth:mesh_profile:1.0.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-26556
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-26556
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.9
|
LOW | AV:A/AC:M/Au:N/C:P/I:N/A:N |
5.5
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
1.6
|
5.9
|
NIST |
CWE ids for CVE-2020-26556
-
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-26556
-
https://www.kb.cert.org/vuls/id/799380
VU#799380 - Devices supporting Bluetooth Core and Mesh Specifications are vulnerable to impersonation attacks and AuthValue disclosureThird Party Advisory;US Government Resource
-
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
Reporting Security Vulnerabilities | Bluetooth® Technology WebsiteVendor Advisory
-
https://kb.cert.org/vuls/id/799380
VU#799380 - Devices supporting Bluetooth Core and Mesh Specifications are vulnerable to impersonation attacks and AuthValue disclosureThird Party Advisory;US Government Resource
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