Vulnerability identifier: #VU87909

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
micropython
Other software / Other software solutions

Vendor: www.micropython.org

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

micropython: 1.0 - 1.21.0

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External links
http://vuldb.com/?id.249180
http://github.com/micropython/micropython/issues/13007
http://github.com/micropython/micropython/pull/13039
http://github.com/micropython/micropython/pull/13039/commits/f397a3ec318f3ad05aa287764ae7cef32202380f
http://github.com/micropython/micropython/releases/tag/v1.22.0

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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.