CVE-2021-3040 : What You Need to Know
Learn about CVE-2021-3040, an unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud allowing code execution. Mitigation steps and impacted versions included.
An in-depth look at the unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud that allows arbitrary code execution when processing a malicious terraform file.
Understanding CVE-2021-3040
This CVE highlights the impact of an unsafe deserialization vulnerability in Bridgecrew Checkov, affecting specific versions and allowing for arbitrary code execution.
What is CVE-2021-3040?
An unsafe deserialization vulnerability in Bridgecrew Checkov by Prisma Cloud enables arbitrary code execution when handling a malicious terraform file. Checkov 2.0 versions earlier than 2.0.139 are affected, while Checkov 1.0 versions remain unaffected.
The Impact of CVE-2021-3040
The vulnerability poses a medium-severity risk, with a base CVSS score of 6.7. While Palo Alto Networks has not detected any malicious exploitation, the potential for arbitrary code execution warrants immediate attention.
Technical Details of CVE-2021-3040
Explore the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.
Vulnerability Description
The flaw allows attackers to execute arbitrary code by leveraging the unsafe deserialization process in Bridgecrew Checkov.
Affected Systems and Versions
Checkov 2.0 versions prior to 2.0.139 are vulnerable to this exploit, while Checkov 1.0 versions remain unaffected.
Exploitation Mechanism
Malicious actors can exploit this vulnerability by crafting a specially designed terraform file to trigger arbitrary code execution.
Mitigation and Prevention
Discover essential steps to mitigate the risks associated with CVE-2021-3040 and prevent potential exploits.
Immediate Steps to Take
Avoid running Checkov on terraform files obtained from untrusted sources or pull requests to minimize the risk of exploitation.
Long-Term Security Practices
Implement secure coding practices and regularly update Checkov to the latest patched version to strengthen overall security posture.
Patching and Updates
Ensure all systems running Checkov are updated to version 2.0.139 or later, where the vulnerability is successfully addressed.