CVE-2022-37428 : Security Advisory and Response
CVE-2022-37428 impacts PowerDNS Recursor up to versions 4.7.1, allowing attackers to crash the service by manipulating DNS queries with specific properties. Learn about the impact and mitigation steps.
PowerDNS Recursor up to and including versions 4.5.9, 4.6.2, and 4.7.1 is affected by CVE-2022-37428 due to improper cleanup upon a thrown exception when protobuf logging is enabled. This vulnerability can result in a denial of service (daemon crash) through a specific DNS query response.
Understanding CVE-2022-37428
This section will delve into the key aspects of the CVE-2022-37428 vulnerability.
What is CVE-2022-37428?
CVE-2022-37428 impacts PowerDNS Recursor versions 4.5.9, 4.6.2, and 4.7.1 by allowing a denial of service attack when protobuf logging is activated. An attacker can cause a daemon crash by manipulating DNS queries.
The Impact of CVE-2022-37428
The vulnerability poses a medium-severity threat with a CVSS base score of 6.5. It can lead to a denial of service condition due to the daemon crash triggered by specific properties in a DNS query response.
Technical Details of CVE-2022-37428
This section will provide more technical insights into CVE-2022-37428.
Vulnerability Description
The vulnerability arises from improper cleanup procedures when an exception occurs, allowing an attacker to exploit this flaw and crash the daemon service.
Affected Systems and Versions
PowerDNS Recursor versions 4.5.9, 4.6.2, and 4.7.1 are affected by this vulnerability when protobuf logging is enabled.
Exploitation Mechanism
Exploiting CVE-2022-37428 involves crafting a DNS query that triggers the daemon crash by generating specific properties in the response.
Mitigation and Prevention
It is crucial to take immediate actions to mitigate the risks posed by CVE-2022-37428.
Immediate Steps to Take
Disable protobuf logging or apply the necessary patches provided by PowerDNS to address this vulnerability and prevent potential denial of service incidents.
Long-Term Security Practices
Regularly monitor security advisories from PowerDNS and promptly apply updates to ensure your systems are protected against known vulnerabilities.
Patching and Updates
Stay informed about security best practices and ensure timely updates and patches are applied to mitigate risks associated with CVE-2022-37428.