CVE-2021-31702 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-31702 affecting Frontier ichris through version 5.18. Learn about the impact, technical aspects, and mitigation strategies for this DNS DoS vulnerability.
Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, allowing for a Denial of Service (DoS) attack by submitting 127.0.0.1 multiple times.
Understanding CVE-2021-31702
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-31702.
What is CVE-2021-31702?
CVE-2021-31702 is a vulnerability in Frontier ichris through version 5.18 that enables attackers to launch DoS attacks by manipulating DNS requests in the HTTP Host header.
The Impact of CVE-2021-31702
The mishandling of DNS requests in Frontier ichris could lead to service disruptions, impacting the availability of the system and potentially causing downtime for users.
Technical Details of CVE-2021-31702
Explore the specifics of the vulnerability, including affected systems, exploitation methods, and versions at risk.
Vulnerability Description
The flaw in Frontier ichris allows malicious actors to abuse the DNS functionality, leveraging the HTTP Host header to trigger a DoS condition by repeatedly sending requests to 127.0.0.1.
Affected Systems and Versions
All instances of Frontier ichris up to version 5.18 are vulnerable to this exploit, putting organizations using outdated versions at risk of potential attacks.
Exploitation Mechanism
Attackers can exploit CVE-2021-31702 by crafting HTTP requests containing the malicious IP address (127.0.0.1) within the Host header, causing the application to repeatedly query the local host and disrupt services.
Mitigation and Prevention
Learn how to safeguard your systems from CVE-2021-31702 with immediate actions and long-term security measures.
Immediate Steps to Take
Organizations should consider implementing network-level protections, such as rate limiting DNS requests or filtering out suspicious headers to mitigate the risk of exploitation.
Long-Term Security Practices
Regularly updating Frontier ichris to the latest secure version, monitoring DNS traffic for anomalies, and educating users on safe practices can enhance the overall security posture of the system.
Patching and Updates
Stay informed about patches released by the vendor to address CVE-2021-31702, and ensure timely deployment to shield systems from potential DoS attacks.