// For flags

CVE-2021-3658

Ubuntu Security Notice USN-5155-1

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.

bluetoothd de bluez guarda incorrectamente el estado Discoverable de los adaptadores cuando es apagado un dispositivo, y lo restaura cuando es encendido. Si un dispositivo es apagado mientras es detectado, será detectado cuando es encendido de nuevo. Esto podría conllevar a una exposición inadvertida de la pila bluetooth a atacantes físicamente cercanos

It was discovered that BlueZ incorrectly handled the Discoverable status when a device is powered down. This could result in devices being powered up discoverable, contrary to expectations. This issue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10. It was discovered that BlueZ incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause BlueZ to consume resources, leading to a denial of service. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-07-22 CVE Reserved
  • 2021-11-24 CVE Published
  • 2024-08-03 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-863: Incorrect Authorization
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Bluez
Search vendor "Bluez"
 Bluez
Search vendor "Bluez" for product "Bluez"
 < 5.61
Search vendor "Bluez" for product "Bluez" and version " < 5.61"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected