CVE-2022-23606 Explained : Impact and Mitigation
Learn about CVE-2022-23606, a vulnerability in Envoy that can lead to abnormal process termination and system crashes. Find out the impacted versions, exploit details, and mitigation steps.
A detailed guide on CVE-2022-23606, a vulnerability in Envoy that can lead to abnormal process termination and system crashes when handling idle connections.
Understanding CVE-2022-23606
This section provides insights into the nature and impact of the vulnerability in Envoy.
What is CVE-2022-23606?
CVE-2022-23606 involves a stack exhaustion issue in Envoy caused by an infinite recursion when disconnecting idle connections after a cluster deletion via Cluster Discovery Service (CDS). This recursion can lead to abnormal process termination and system crashes.
The Impact of CVE-2022-23606
The vulnerability poses a medium severity risk, with a CVSS base score of 4.4. It requires high privileges for exploitation and can result in high availability impact, potentially crashing the Envoy service.
Technical Details of CVE-2022-23606
Explore the specifics of the vulnerability including affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability in Envoy can be exploited by malicious actors to exhaust the stack and terminate processes, causing the service to crash.
Affected Systems and Versions
Envoy versions 1.20.0 to 1.20.1 and 1.21.0 to 1.21.1 are affected by CVE-2022-23606.
Exploitation Mechanism
Exploiting the vulnerability requires high privileges as it involves triggering an infinite recursion during the disconnection of idle connections after deleting a cluster.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2022-23606 and prevent potential exploitation.
Immediate Steps to Take
Users are strongly advised to upgrade Envoy to versions above 1.20.1 and 1.21.1 to mitigate the risk of stack exhaustion, abnormal process termination, and system crashes.
Long-Term Security Practices
Implement robust security measures such as regularly updating Envoy, monitoring idle connections, and reviewing cluster deletion procedures to enhance system resilience.
Patching and Updates
Stay informed about security advisories from Envoy and promptly apply patches and updates to ensure the protection of your systems from vulnerabilities like CVE-2022-23606.