SB2022020706 - Multiple vulnerabilities in Moxa TN-5900

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper validation of integrity check value (CVE-ID: CVE-2021-46559)

The vulnerability allows a remote attacker to bypass integrity checks.

The vulnerability exists due to a weak algorithm. A remote authenticated attacker can upload abritrary code in a crafted firmware image simply by replacing a CRC value in the image header.

2) OS Command Injection (CVE-ID: CVE-2021-46560)

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

The vulnerability exists due to improper input validation in the p12 processing code of the certificate management function web_CERMGMTUpload. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Remediation

Install update from vendor's website.

References

• https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilities
• https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilitiestxt