PT-2024-39333 · Unknown · Micropython

Qbit · Published 2024-09-17 · Updated 2024-09-23 · CVE-2024-8948

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: MicroPython version 1.23.0

Description: A critical issue has been found, affecting the mpz as bytes function of the file py/objint.c. This issue leads to a heap-based buffer overflow. The attack can be launched remotely. The problem arises when converting zero from int to bytes, resulting in a heap buffer-overflow-write at mpz as bytes.

Recommendations: For MicroPython version 1.23.0, apply a patch to fix this issue, specifically the patch identified as 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894. As a temporary workaround, consider disabling the mpz as bytes function until a patch is available.

Exploit

Fix

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-787

CWE-122

Related Identifiers

CVE-2024-8948

GHSA-VH3X-525M-JP4R

PYSEC-2024-87

PYSEC-2024-88

PYSEC-2024-89

Affected Products

Micropython

References · 22

• 🔥 https://github.com/micropython/micropython/issues/13041 · Exploit
• https://github.com/micropython/micropython/commit/908ab1ceca15ee6fd0ef82ca4cba770a3ec41894 · Patch
• https://osv.dev/vulnerability/GHSA-vh3x-525m-jp4r · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-8948 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-8948 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-8948 · Security Note
• https://ubuntu.com/security/CVE-2024-8948 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-8948 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-8948 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-8948 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2024-88 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2024-89 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2024-87 · Vendor Advisory
• https://github.com/pypa/advisory-database/tree/main/vulns/micropython-io/PYSEC-2024-88.yaml · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/micropython-os/PYSEC-2024-89.yaml · Note