PT-2023-4508 · Moxa · Moxa Tn-4900 Series+1

Published 2023-05-31 · Updated 2023-08-23 · CVE-2023-34217

Positive Technologies (AI Summary)

CVSS v2.0

8.5

High

Base vector

AV:N/AC:L/Au:S/C:N/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 is related to insufficient input validation in the certificate-delete function, which could potentially allow malicious users to delete arbitrary files. This stems from incorrect restriction of the path name to a directory with limited access. Exploitation of the issue may allow a remote attacker to create or overwrite critical files and execute arbitrary code.

Recommendations For Moxa TN-4900 Series firmware versions v1.2.4 and prior, consider disabling the certificate-delete function until a patch is available. For Moxa TN-5900 Series firmware versions v3.3 and prior, restrict access to the certificate-delete function to minimize the risk of exploitation. As a temporary workaround, avoid using the certificate-delete function in the affected firmware versions until the issue is resolved.

Fix

Command Injection

Path traversal

Weakness Enumeration

CWE-77

CWE-22

Related Identifiers

BDU:2023-04911

CVE-2023-34217

Affected Products

Moxa Tn-4900 Series

Moxa Tn-5900 Series

References · 7

• https://osv.dev/vulnerability/CVE-2023-34217 · 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/2023-04911 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-34217 · Security Note
• https://t.me/cvenotify/56725 · Telegram Post
• https://twitter.com/cracbot/status/1692416107381194780 · Twitter Post
• https://t.me/cibsecurity/68725 · Telegram Post