What is the CVSS score of CVE-2021-31611?

CVE-2021-31611 has a CVSS 3.1 base score of 5.7 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

Ac6901 Firmware CVE-2021-31611

MEDIUM

Improper Locking (CWE-667)

2021-09-07 cve@mitre.org

Information Disclosure Ac6901 Firmware Ac6925 Firmware Ac6926 Firmware Ac6928 Firmware Ac6921 Firmware

5.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.7 MEDIUM

AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Sep 07, 2021 - 07:15 nvd

MEDIUM 5.7

DescriptionNVD

The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle an out-of-order LMP Setup procedure that is followed by a malformed LMP packet, allowing attackers in radio range to deadlock a device via a crafted LMP packet. The user needs to manually reboot the device to restore communication.

AnalysisAI

The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle an out-of-order LMP Setup procedure that is followed by a malformed LMP packet, allowing. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-667. The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle an out-of-order LMP Setup procedure that is followed by a malformed LMP packet, allowing attackers in radio range to deadlock a device via a crafted LMP packet. The user needs to manually reboot the device to restore communication. Affected products include: Zh-Jieli Ac6901 Firmware, Zh-Jieli Ac6925 Firmware, Zh-Jieli Ac6926 Firmware, Zh-Jieli Ac6928 Firmware, Zh-Jieli Ac6921 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.