CVE-2021-34555 : What You Need to Know
Learn about CVE-2021-34555 affecting OpenDMARC 1.4.1 and 1.4.1.1, allowing remote attackers to trigger a denial of service attack through a specific input. Understand the impact, technical details, and mitigation steps.
OpenDMARC 1.4.1 and 1.4.1.1 are vulnerable to a denial of service attack due to a NULL pointer dereference and application crash triggered by a specific input. Learn more about the impact, technical details, and mitigation steps related to CVE-2021-34555.
Understanding CVE-2021-34555
This section provides insights into the vulnerability identified as CVE-2021-34555 in OpenDMARC 1.4.1 and 1.4.1.1.
What is CVE-2021-34555?
CVE-2021-34555 relates to a security flaw in OpenDMARC versions 1.4.1 and 1.4.1.1 that allows remote attackers to perform a denial of service attack by exploiting a multi-value From header field.
The Impact of CVE-2021-34555
The vulnerability can be exploited by malicious actors to cause a denial of service, resulting in a NULL pointer dereference and application crash in affected systems.
Technical Details of CVE-2021-34555
Explore the specific technical aspects of the CVE-2021-34555 vulnerability to understand its implications better.
Vulnerability Description
OpenDMARC 1.4.1 and 1.4.1.1 are susceptible to a denial of service attack triggered by a specific input in the From header field, leading to a NULL pointer dereference and subsequent application crash.
Affected Systems and Versions
All systems running OpenDMARC versions 1.4.1 and 1.4.1.1 are vulnerable to CVE-2021-34555 and should take immediate action to mitigate the risk.
Exploitation Mechanism
Remote attackers can exploit the vulnerability by sending crafted requests with a multi-value From header field, causing the targeted system to crash.
Mitigation and Prevention
Discover the necessary steps to protect your systems from potential exploitation of CVE-2021-34555.
Immediate Steps to Take
System administrators should apply relevant patches and updates provided by the vendor to address the vulnerability in OpenDMARC 1.4.1 and 1.4.1.1.
Long-Term Security Practices
Implementing robust security measures, such as network segmentation and access control policies, can help enhance overall system resilience against similar vulnerabilities.
Patching and Updates
Regularly monitor security advisories and official sources for patches and updates related to OpenDMARC to stay protected against emerging threats.