ISC BIND CVE-2019-6477 Remote Denial of Service Vulnerability

Description

ISC BIND is prone to a remote denial-of-service vulnerability. An attacker can exploit this issue to cause a denial-of-service condition.

Technologies Affected

• ISC Bind 9.11.0
• ISC Bind 9.11.2
• ISC Bind 9.11.3
• ISC Bind 9.11.4
• ISC Bind 9.11.5
• ISC Bind 9.11.6
• ISC Bind 9.11.7
• ISC Bind 9.11.8
• ISC Bind 9.14.0
• ISC Bind 9.14.1
• ISC Bind 9.14.2
• ISC Bind 9.14.3
• ISC Bind 9.14.6
• ISC Bind 9.14.7
• ISC Bind 9.15.0
• ISC Bind 9.15.1
• ISC Bind 9.15.4
• ISC Bind 9.15.5
• Redhat Enterprise Linux 7
• Redhat Enterprise Linux 8
• Ubuntu Ubuntu Linux 18.04 LTS
• Ubuntu Ubuntu Linux 19.04
• Ubuntu Ubuntu Linux 19.10

Recommendations

Block external access at the network boundary, unless external parties require service.
Allow only trusted hosts and networks to connect to computers running the affected software. This will limit the potential for remote attackers to exploit this issue.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to malformed requests and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.