MicroPython 1.23.0 py/objint.c mpz_as_bytes heap-based overflow

CVSS Meta Temp Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability was found in MicroPython 1.23.0. It has been declared as critical. Impacted is the function mpz_as_bytes of the file py/objint.c. Such manipulation leads to heap-based overflow. This vulnerability is documented as CVE-2024-8948. The attack can be executed remotely. Additionally, an exploit exists. It is best practice to apply a patch to resolve this issue. In micropython objint component, converting zero from int to bytes leads to heap buffer-overflow-write at mpz_as_bytes.

Detailsinfo

A vulnerability was found in MicroPython 1.23.0. It has been rated as critical. Affected by this issue is the function mpz_as_bytes of the file py/objint.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2024-8948. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. In micropython objint component, converting zero from int to bytes leads to heap buffer-overflow-write at mpz_as_bytes.

Applying the patch 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.3
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894

Timelineinfo

09/17/2024 🔍
09/17/2024 +0 days 🔍
09/24/2024 +6 days 🔍

Sourcesinfo

Product: github.com

Advisory: 13041
Status: Confirmed

CVE: CVE-2024-8948 (🔍)
GCVE (CVE): GCVE-0-2024-8948
GCVE (VulDB): GCVE-100-277766
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/17/2024 14:52
Updated: 09/24/2024 00:02
Changes: 09/17/2024 14:52 (59), 09/17/2024 20:55 (1), 09/18/2024 04:46 (18), 09/18/2024 18:08 (1), 09/24/2024 00:02 (11)
Complete: 🔍
Submitter: qbit
Cache ID: 216::103

Submitinfo

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