PT-2023-4620 · Moxa · Moxa Tn-4900 Series+1

Published 2023-08-16 · Updated 2024-10-28 · CVE-2023-33239

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Moxa TN-4900 Series firmware versions v1.2.4 and prior Moxa TN-5900 Series firmware versions v3.3 and prior

Description The issue stems from insufficient input validation in the key-generation function, which could potentially allow malicious users to execute remote code on affected devices. This is due to errors in processing input data in the key-generation function.

Recommendations For Moxa TN-4900 Series firmware versions v1.2.4 and prior, update to a version later than v1.2.4 to resolve the issue. For Moxa TN-5900 Series firmware versions v3.3 and prior, update to a version later than v3.3 to resolve the issue. As a temporary workaround, consider restricting access to the key-generation function until a patch is available.

Fix

Command Injection

OS Command Injection

Weakness Enumeration

CWE-77

CWE-78

Related Identifiers

BDU:2023-05027

CVE-2023-33239

Affected Products

Moxa Tn-4900 Series

Moxa Tn-5900 Series

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2023-33239 · Security Note
• https://osv.dev/vulnerability/CVE-2023-33239 · Vendor Advisory
• https://moxa.com/en/support/product-support/security-advisory/mpsa-230402-tn-5900-and-tn-4900-series-web-server-multiple-vulnerabilities · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-05027 · Security Note
• https://twitter.com/VulmonFeeds/status/1692050374159470733 · Twitter Post
• https://twitter.com/CVEnew/status/1692000073939607686 · Twitter Post
• https://twitter.com/cracbot/status/1692416099697274932 · Twitter Post
• https://t.me/cvenotify/99692 · Telegram Post