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CVE-2024-8948— MicroPython objint.c mpz_as_bytes heap-based overflow

Quick assessment

Affected
n/a MicroPython
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MicroPython是MicroPython开源的一个小型的开源Python编程语言解释器。 MicroPython 1.23.0版本存在安全漏洞，该漏洞源于py/objint.c文件中的mpz_as_bytes函数，在将整数转换为字节时会导致堆缓冲区溢写出错。

CVSS 7.3 · High EPSS 0.99% · P61

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2024-8948

Vulnerability Information
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Vulnerability Title
MicroPython objint.c mpz_as_bytes heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
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 leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The patch is identified as 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894. It is recommended to apply a patch to fix this issue. In micropython objint component, converting zero from int to bytes leads to heap buffer-overflow-write at mpz_as_bytes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
MicroPython 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MicroPython是MicroPython开源的一个小型的开源Python编程语言解释器。 MicroPython 1.23.0版本存在安全漏洞，该漏洞源于py/objint.c文件中的mpz_as_bytes函数，在将整数转换为字节时会导致堆缓冲区溢写出错。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- MicroPython 1.23.0 -

II. Public POCs for CVE-2024-8948

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Qwen3.6-35B-A3B · 7646 chars
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III. Intelligence Information for CVE-2024-8948

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Patches & Fixes for CVE-2024-8948 (1)

News Coverage for CVE-2024-8948 (1)

Same Patch Batch · n/a · 2024-09-17 · 9 CVEs total

CVE-2024-38812 9.8 CRITICAL Heap-overflow vulnerability
CVE-2024-38813 7.5 HIGH Privilege escalation vulnerability
CVE-2024-8946 7.3 HIGH MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow
CVE-2024-8947 5.6 MEDIUM MicroPython objarray.c use after free
CVE-2024-46085 FrogCms 安全漏洞
CVE-2024-46362 FrogCms 安全漏洞
CVE-2024-47047 TYPO3 安全漏洞
CVE-2024-47049 File Handling and Storage Helper 安全漏洞

IV. Related Vulnerabilities

Same product: MicroPython
Same vendor: n/a
Same weakness: CWE-122

V. Comments for CVE-2024-8948

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