Multiple vulnerabilities in micropython

Published: 2024-03-28

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-7152 CVE-2023-7158
CWE-ID	CWE-416 CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	micropython Other software / Other software solutions
Vendor	www.micropython.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU87910

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-7152

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the poll_set_add_fd() function in extmod/modselect.c. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

micropython: 1.21.0

External links

http://vuldb.com/?id.249158
http://github.com/micropython/micropython/issues/12887
http://github.com/jimmo/micropython/commit/8b24aa36ba978eafc6114b6798b47b7bfecdca26

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

EUVDB-ID: #VU87909

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-7158

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the slice_indices() function in objslice.c. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.