PT-2021-6069 · Moxa · Moxa Mgate 5109+2

Qian Chen · Published 2021-12-28 · Updated 2022-02-26 · CVE-2021-46082

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Moxa TN-5900 version 3.1 Moxa MGate 5109 version 2.2 Moxa MGate 5101-PBM-MN version 2.1

Description The issue is related to a memory leak that can be exploited by attackers to cause a Denial of Service (DoS) via crafted packets. This can be achieved by a remote attacker, allowing them to disrupt service.

Recommendations For Moxa TN-5900 version 3.1, update the firmware to a version that addresses the memory leak issue. For Moxa MGate 5109 version 2.2, apply configuration changes to prevent exploitation of the memory leak. For Moxa MGate 5101-PBM-MN version 2.1, restrict access to the device to minimize the risk of exploitation until a patch is available.

Fix

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2022-00675

CVE-2021-46082

Affected Products

Moxa Mgate 5101-Pbm-Mn

Moxa Mgate 5109

Moxa Tn-5900

References · 7

• https://moxa.com/en/support/product-support/security-advisory/mgate-5109-5101-protocol-gateways-vulnerability · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46082 · Security Note
• https://moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerability · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-00675 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46082 · Vendor Advisory
• https://securitylab.ru/vulnerability/528403.php · Note
• https://cybersecurity-help.cz/vdb/SB2022011007 · Note