MicroPython 1.22.2 py/objarray.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.05

A vulnerability was found in MicroPython 1.22.2. It has been declared as critical. Affected by this vulnerability is an unknown code block of the file py/objarray.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2024-8947. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

In micropython objarray component, when a bytes object is resized and copied into itself, it may reference memory that has already been freed. 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.

Upgrading to version 1.23.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4bed614e707c0644c06e117f848fa12605c711cd is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (235069). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔒

CNA Base Score: 5.6
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Local: No
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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MicroPython 1.23.0
Patch: 4bed614e707c0644c06e117f848fa12605c711cd

Timelineinfo

09/17/2024 Advisory disclosed
09/17/2024 +0 days VulDB entry created
05/02/2025 +227 days VulDB entry last update

Sourcesinfo

Advisory: 13283
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2024-8947 (🔒)
GCVE (CVE): GCVE-0-2024-8947
GCVE (VulDB): GCVE-100-277765

Entryinfo

Created: 09/17/2024 02:52 PM
Updated: 05/02/2025 06:34 AM
Changes: 09/17/2024 02:52 PM (58), 09/17/2024 08:54 PM (1), 09/18/2024 04:46 AM (18), 09/18/2024 06:08 PM (1), 09/24/2024 04:01 PM (11), 05/02/2025 06:34 AM (2)
Complete: 🔍
Submitter: qbit
Cache ID: 18:3CB:40

Submitinfo

Accepted

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