CVE-2022-3488 : Security Advisory and Response
Learn about CVE-2022-3488 affecting BIND 9, where repeated responses with ECS options can lead to unexpected termination. Discover impact, mitigation, and prevention.
A detailed analysis of the vulnerability in BIND 9 that can lead to unexpected termination when processing ECS options in repeated responses to iterative queries.
Understanding CVE-2022-3488
This section provides insights into the nature of the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2022-3488?
CVE-2022-3488 refers to a flaw in BIND 9 that arises during the processing of repeated responses to a query. When both responses contain ECS pseudo-options and the initial response is faulty, BIND may exit with an assertion failure. The affected versions include BIND 9 versions 9.11.4-S1 through 9.11.37-S1 and 9.16.8-S1 through 9.16.36-S1.
The Impact of CVE-2022-3488
An attacker controlling a malicious nameserver could exploit this vulnerability by sending two responses in quick succession, both with a "CLIENT-SUBNET" pseudo-option, causing the termination of the BIND service. All affected versions of the BIND Supported Preview Edition are at risk, even if not configured to use ECS.
Technical Details of CVE-2022-3488
Let's delve into the technical aspects of the vulnerability to understand its implications better.
Vulnerability Description
The flaw occurs when processing repeated responses to the same query with ECS pseudo-options, leading to a potential assertion failure in BIND.
Affected Systems and Versions
The vulnerability affects BIND 9 versions 9.11.4-S1 through 9.11.37-S1 and 9.16.8-S1 through 9.16.36-S1.
Exploitation Mechanism
An attacker can exploit the vulnerability by sending two responses in succession, triggering unexpected termination in the BIND service.
Mitigation and Prevention
Discover essential steps to mitigate the risk posed by CVE-2022-3488 and secure your systems.
Immediate Steps to Take
No known workarounds are available. Upgrading to the patched release closest to your current BIND 9 version, specifically 9.16.37-S1, is recommended.
Long-Term Security Practices
Implement robust security measures such as regular software updates, network monitoring, and DNS best practices to enhance overall cybersecurity.
Patching and Updates
Ensure timely patching and updates to the latest secure version of BIND 9 to address the vulnerability.
This vulnerability was identified by Infoblox and acknowledged by ISC.
For more details, visit the official ISC KB page.