Medium severity · published Jun 25, 2021
CVE-2021-31615
Unencrypted Bluetooth Low Energy baseband links in Bluetooth Core Specifications 4.0 through 5.2 may permit an adjacent device to inject a crafted packet during the receive window…
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
Unencrypted Bluetooth Low Energy baseband links in Bluetooth Core Specifications 4.0 through 5.2 may permit an adjacent device to inject a crafted packet during the receive window of the listening device before the transmitting device initiates its packet transmission to achieve full MITM status without terminating the link. When applied against devices establishing or using encrypted links, crafted packets may be used to terminate an existing link, but will not compromise the confidentiality or integrity of the link.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BC
Bluetooth Core Specification · Bluetooth
4.0 through 5.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31615
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31615
Vendor Advisory
https://bluetooth.com
Vendor Advisory
https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/injectable/
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