CVE-2021-41229

Memory leak in BlueZ

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.

BlueZ es una pila de protocolos Bluetooth para Linux. En las versiones afectadas se presenta una vulnerabilidad en la función sdp_cstate_alloc_buf que asigna memoria que siempre quedará colgada en la lista enlazada de cstates y no será liberada. Esto causará una pérdida de memoria con el tiempo. Los datos pueden ser un objeto muy grande, lo que puede ser causado por un atacante que envía continuamente paquetes sdp y esto puede causar el bloqueo del servicio del dispositivo de destino

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-09-15 CVE Reserved
2021-11-12 CVE Published
2024-07-28 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/11/msg00022.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html	Mailing List
https://security.netapp.com/advisory/ntap-20211203-0004	Third Party Advisory

URL	Date	SRC
https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-41229	2022-05-10
https://bugzilla.redhat.com/show_bug.cgi?id=2025034	2022-05-10

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"				5.58 Search vendor "Bluez" for product "Bluez" and version "5.58"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected