CVE-2021-3455 — MEDIUM (4.3)

Vulnerability Description

Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Zephyrproject	Zephyr	>= 2.4.0, < 2.6.0

Related Weaknesses (CWE)

CWE-416

References

http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-vExploitThird Party Advisory
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-vExploitThird Party Advisory

FAQ

What is CVE-2021-3455?

CVE-2021-3455 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrprojec...

How severe is CVE-2021-3455?

CVE-2021-3455 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-3455?

Check the references section above for vendor advisories and patch information. Affected products include: Zephyrproject Zephyr.