SB2020042406 - Multiple vulnerabilities in NGINX Controller

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper Certificate Validation (CVE-ID: CVE-2020-5864)

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to communication between NGINX Controller and NGINX Plus instances skip TLS verification by default. A remote attacker can perform a MitM attack and read/modify data in transit.

2) Improper Authorization (CVE-ID: CVE-2020-5863)

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

The vulnerability exists due to NGINX Controller allows a remote unauthenticated attacker to create unprivileged user accounts and upload a new license to the system. A remote attacker can use this behavior to consume all available disk space on the system and perform a denial of service attack.

Remediation

Install update from vendor's website.

References

• https://support.f5.com/csp/article/K27205552
• https://api-u.f5.com/support/kb-articles/K14631834?cacheFlag=false