SB2020090817 - Denial of service in Windows DNS Server

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2020-1228)

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

The vulnerability exists due to insufficient validation of user-supplied input in Windows DNS server. A remote attacker can pass specially crafted DNS query to the server and perform a denial of service (DoS) attack.

2) Input validation error (CVE-ID: CVE-2020-0836)

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

The vulnerability exists due to insufficient validation of user-supplied input in Windows DNS server. A remote attacker can pass specially crafted DNS query to the server and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1228
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0836