Buffer overflow in Micropython
CVE-2024-8946
A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.010 (62.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Micropython — versions 1.23.0
- Micropython — versions 1.23.0
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required)
- vuldb.com/ (Third Party Advisory, third-party-advisory)
- github.com/micropython/micropython/issues/13006 (issue-tracking, Exploit, exploit, Issue Tracking)
- github.com/micropython/micropython/issues/13006 (issue-tracking, Exploit, Third Party Advisory)
- github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea… (Patch, patch)
Frequently asked questions
- What is CVE-2024-8946?
- CVE-2024-8946 is a high-severity vulnerability in Micropython, classified under Heap-based Buffer Overflow. CVSS score: 7.3/10. Published 2024-09-17.
- How severe is CVE-2024-8946?
- High severity. CVSS v3 base score is 7.3 out of 10.