CVE-2024-8946
MicroPython VFS Unmount Handler Heap Buffer Overflow
Description
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.
INFO
Published Date :
Sept. 17, 2024, 7:15 p.m.
Last Modified :
Sept. 24, 2024, 1:11 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update the MicroPython package.
- Apply the patch to fix this issue.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-8946.
| URL | Resource |
|---|---|
| https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b | Patch |
| https://github.com/micropython/micropython/issues/13006 | Exploit Issue Tracking |
| https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455 | Exploit Third Party Advisory |
| https://vuldb.com/?ctiid.277764 | Permissions Required |
| https://vuldb.com/?id.277764 | Third Party Advisory |
| https://vuldb.com/?submit.409312 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-8946 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-8946
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-8946 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-8946 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 24, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b No Types Assigned https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b Patch Changed Reference Type https://github.com/micropython/micropython/issues/13006 No Types Assigned https://github.com/micropython/micropython/issues/13006 Exploit, Issue Tracking Changed Reference Type https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455 No Types Assigned https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455 Exploit, Third Party Advisory Changed Reference Type https://vuldb.com/?ctiid.277764 No Types Assigned https://vuldb.com/?ctiid.277764 Permissions Required Changed Reference Type https://vuldb.com/?id.277764 No Types Assigned https://vuldb.com/?id.277764 Third Party Advisory Changed Reference Type https://vuldb.com/?submit.409312 No Types Assigned https://vuldb.com/?submit.409312 Third Party Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:micropython:micropython:1.23.0:*:*:*:*:*:*:* -
CVE Received by [email protected]
Sep. 17, 2024
Action Type Old Value New Value Added Description 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. Added Reference VulDB https://vuldb.com/?id.277764 [No types assigned] Added Reference VulDB https://vuldb.com/?ctiid.277764 [No types assigned] Added Reference VulDB https://vuldb.com/?submit.409312 [No types assigned] Added Reference VulDB https://github.com/micropython/micropython/issues/13006 [No types assigned] Added Reference VulDB https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455 [No types assigned] Added Reference VulDB https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b [No types assigned] Added CWE VulDB CWE-122 Added CVSS V2 VulDB (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 VulDB AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Added CVSS V4.0 VulDB CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X