STMicroelectronics stm32_mw_usb_host buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in STMicroelectronics. This affects an unknown function of the component stm32_mw_usb_host. The manipulation results in buffer overflow. This vulnerability is identified as CVE-2021-42553. An attack on the physical device is feasible. There is not any exploit available.

Detailsinfo

A vulnerability was found in STMicroelectronics (the affected version unknown). It has been classified as critical. Affected is an unknown part of the component stm32_mw_usb_host. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A buffer overflow vulnerability in stm32_mw_usb_host of STMicroelectronics allows an attacker to execute arbitrary code when the descriptor contains more endpoints than USBH_MAX_NUM_ENDPOINTS. The library is typically integrated when using a RTOS such as FreeRTOS on STM32 MCUs.

The weakness was released 10/21/2022. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-42553 since 10/15/2021. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 235069 (Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Micropython vulnerabilities (USN-7472-1)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (235069). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 6.8
CNA Vector: 🔍

CVSSv2info

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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: Yes
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 235069
Nessus Name: Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Micropython vulnerabilities (USN-7472-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/15/2021 🔍
10/21/2022 +371 days 🔍
10/21/2022 +0 days 🔍
05/08/2025 +929 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2021-42553 (🔍)
GCVE (CVE): GCVE-0-2021-42553
GCVE (VulDB): GCVE-100-211956

Entryinfo

Created: 10/21/2022 16:54
Updated: 05/08/2025 00:18
Changes: 10/21/2022 16:54 (45), 11/19/2022 09:38 (1), 05/02/2025 06:34 (22), 05/08/2025 00:18 (13)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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