CVE-2022-0635 : What You Need to Know

A detailed overview of CVE-2022-0635 regarding the BIND vulnerability.

Understanding CVE-2022-0635

This section provides insight into the nature and impact of the CVE-2022-0635 vulnerability.

What is CVE-2022-0635?

The vulnerability affects BIND resolvers running version 9.18.0, leading to a terminated process due to a failed assertion check upon receiving specific queries.

The Impact of CVE-2022-0635

BIND 9.18.0 instances can unexpectedly terminate when the named process encounters specific query patterns, resulting in the disruption of domain name resolution services.

Technical Details of CVE-2022-0635

Explore the specific technical aspects of the CVE-2022-0635 vulnerability in the following sections.

Vulnerability Description

The vulnerability arises in BIND 9.18.0 due to repeated patterns of specific queries triggering an INSIST failure in query.c:query_dname.

Affected Systems and Versions

BIND resolvers running version 9.18.0 with both dnssec-validation and synth-from-dnssec enabled are susceptible to this vulnerability.

Exploitation Mechanism

By sending specific queries to servers with the 'synth-from-dnssec' feature enabled, attackers can exploit the vulnerability to cause the named process to terminate unexpectedly.

Mitigation and Prevention

Learn how to address and safeguard against the CVE-2022-0635 vulnerability through effective mitigation strategies.

Immediate Steps to Take

To mitigate the vulnerability, users of BIND 9.18.0 are advised to upgrade to BIND 9.18.1 to prevent unexpected process terminations.

Long-Term Security Practices

Implementing secure configurations and regularly updating BIND versions can enhance overall system resilience against potential vulnerabilities.

Patching and Updates

Regularly monitor for software updates and patches provided by ISC to stay protected against emerging threats and vulnerabilities.