zephyrproject-rtos Zephyr USB Device Bluetooth net_buf_add_mem buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in zephyrproject-rtos Zephyr. The impacted element is the function net_buf_add_mem of the component USB Device Bluetooth Handler. The manipulation leads to buffer overflow. This vulnerability is documented as CVE-2021-3966. The attack requires being on the local network. There is not any exploit available.

Detailsinfo

A vulnerability was found in zephyrproject-rtos Zephyr (Project Management Software) (affected version not known). It has been rated as critical. This issue affects the function net_buf_add_mem of the component USB Device Bluetooth Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.

The weakness was released 01/11/2023 as GHSA-hfxq-3w6x-fv2m. The advisory is shared at github.com. The identification of this vulnerability is CVE-2021-3966 since 11/16/2021. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/01/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 9.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 9.6
CNA Vector (Zephyr Project): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/16/2021 🔍
01/11/2023 +421 days 🔍
01/11/2023 +0 days 🔍
02/01/2023 +21 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-hfxq-3w6x-fv2m
Status: Confirmed

CVE: CVE-2021-3966 (🔍)
GCVE (CVE): GCVE-0-2021-3966
GCVE (VulDB): GCVE-100-217961

Entryinfo

Created: 01/11/2023 07:37
Updated: 02/01/2023 12:14
Changes: 01/11/2023 07:37 (40), 02/01/2023 12:14 (21)
Complete: 🔍
Cache ID: 216:3E7:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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