SB2021062206 - Multiple vulnerabilities in MOXA Mgate MB3180

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2021-33823)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a huge amount of TCP SYN packet to trigger resource exhaustion and perform a denial of service (DoS) attack.

2) Resource exhaustion (CVE-ID: CVE-2021-33824)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a specially crafted HTTP request using the slowhttptest tool, trigger resource exhaustion and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.md
• https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-series
• https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33824.md
• https://github.com/shekyan/slowhttptest