CVE-2021-3690 : What You Need to Know
Discover the impact and mitigation strategies for CVE-2021-3690, a buffer leak vulnerability in Undertow allowing attackers to cause denial of service attacks through memory exhaustion.
A buffer leak vulnerability in Undertow has been identified as CVE-2021-3690, potentially leading to memory exhaustion and denial of service attacks.
Understanding CVE-2021-3690
This section provides insights into the nature and impact of the CVE-2021-3690 vulnerability.
What is CVE-2021-3690?
The flaw in Undertow involves a buffer leak on the incoming WebSocket PONG message, which could be exploited by attackers to exhaust memory and cause denial of service, posing a significant threat to availability.
The Impact of CVE-2021-3690
The primary impact of this vulnerability is the potential for attackers to disrupt the availability of affected systems through memory exhaustion and denial of service attacks.
Technical Details of CVE-2021-3690
Delve deeper into the technical aspects of CVE-2021-3690 to understand affected systems, exploitation mechanisms, and more.
Vulnerability Description
The vulnerability in Undertow could allow attackers to exploit a buffer leak in the incoming WebSocket PONG message, leading to memory exhaustion and denial of service attacks.
Affected Systems and Versions
Undertow versions vulnerable to this flaw include versions up to 2.2.10.Final and 2.0.40.Final. Ensure your system is updated to a fixed version to mitigate the risk.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending crafted WebSocket PONG messages to the affected Undertow servers, triggering buffer leaks and potential denial of service.
Mitigation and Prevention
Learn about the necessary steps to mitigate the impact of CVE-2021-3690 and prevent similar security vulnerabilities.
Immediate Steps to Take
Immediate mitigation steps include updating Undertow to the fixed versions, applying patches, and monitoring system resources for unusual activities.
Long-Term Security Practices
Implement comprehensive security practices such as regular vulnerability scanning, network segmentation, and access control to enhance overall system security.
Patching and Updates
Regularly check for security updates for Undertow and apply patches promptly to address known vulnerabilities and enhance system resilience.