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.
References (5)
Core 5
Core References
Third Party Advisory vdb-entry
technical-description
https://vuldb.com/?id.277766
Permissions Required signature
permissions-required
https://vuldb.com/?ctiid.277766
Third Party Advisory third-party-advisory
https://vuldb.com/?submit.409317
Exploit, Issue Tracking, Third Party Advisory exploit
issue-tracking
https://github.com/micropython/micropython/issues/13041
Scores
CVSS v3
7.3
EPSS
0.0009
EPSS Percentile
25.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-122
CWE-787
Status
published
Products (4)
micropython/micropython
1.23.0
pypi/micropython-copy
0PyPI
pypi/micropython-io
0PyPI
pypi/micropython-os
0PyPI
Published
Sep 17, 2024
Tracked Since
Feb 18, 2026