CVE-2020-15802: bluetooth bluetooth_core_specification Improper Authentication
Vulnerability summary
CVE-2020-15802 is a medium (CVSS 5.9) Improper Authentication vulnerability in bluetooth bluetooth_core_specification. EPSS estimates a 7.08% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities.
Timeline
- 11-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Devices supporting Bluetooth before 5.1 may allow man-in-the-middle attacks, aka BLURtooth. Cross Transport Key Derivation in Bluetooth Core Specification v4.2 and v5.0 may permit an unauthenticated user to establish a bonding with one transport, either LE or BR/EDR, and replace a bonding already established on the opposing transport, BR/EDR or LE, potentially overwriting an authenticated key with an unauthenticated key, or a key with greater entropy with one with less.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
7.08%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.08% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu159 products
- bluezAll versions (No fix recorded)
- linuxAll versions (No fix recorded)
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
Bluetooth1 product
2 vendors · 160 products
References
7 links- gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709X Refsource MISCREPORTThird Party Advisory
- www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/X Refsource CONFIRMVendor Advisory