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THREATINT
PUBLISHED

CVE-2024-8946

MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow



Description

EN DE

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.

Es wurde eine kritische Schwachstelle in MicroPython 1.23.0 ausgemacht. Betroffen hiervon ist die Funktion mp_vfs_umount der Datei extmod/vfs.c der Komponente VFS Unmount Handler. Durch die Manipulation mit unbekannten Daten kann eine heap-based buffer overflow-Schwachstelle ausgenutzt werden. Umgesetzt werden kann der Angriff über das Netzwerk. Der Exploit steht zur öffentlichen Verfügung. Der Patch wird als 29943546343c92334e8518695a11fc0e2ceea68b bezeichnet. Als bestmögliche Massnahme wird Patching empfohlen.

Reserved 2024-09-17 | Published 2024-09-17 | Updated 2024-09-17 | Assigner VulDB


MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

Problem types

Heap-based Buffer Overflow

Timeline

2024-09-17:Advisory disclosed
2024-09-17:VulDB entry created
2024-09-17:VulDB entry last update

Credits

qbit (VulDB User) reporter

References

vuldb.com/?id.277764 (VDB-277764 | MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.277764 (VDB-277764 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.409312 (Submit #409312 | micropython v1.23.0 Heap-based Buffer Overflow) third-party-advisory

github.com/micropython/micropython/issues/13006 exploit issue-tracking

github.com/micropython/micropython/issues/13006 issue-tracking

github.com/...ommit/29943546343c92334e8518695a11fc0e2ceea68b patch

cve.org (CVE-2024-8946)

nvd.nist.gov (CVE-2024-8946)

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