Learn about CVE-2020-14039, a vulnerability in Go before 1.13.13 and 1.14.x before 1.14.5, leading to incomplete X.509 certificate verification. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.
Understanding CVE-2020-14039
This CVE highlights a vulnerability in Go versions prior to 1.13.13 and 1.14.x before 1.14.5 that could lead to incomplete X.509 certificate verification.
What is CVE-2020-14039?
CVE-2020-14039 is a security vulnerability in Go programming language versions that may result in inadequate X.509 certificate verification due to missing checks on EKU requirements.
The Impact of CVE-2020-14039
The incomplete certificate verification could potentially allow malicious actors to bypass security measures and perform unauthorized actions, compromising the integrity and confidentiality of data.
Technical Details of CVE-2020-14039
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The issue arises from a lack of verification of the VerifyOptions.KeyUsages EKU requirements in certain scenarios, leading to incomplete X.509 certificate validation.
Affected Systems and Versions
Exploitation Mechanism
By exploiting this vulnerability, attackers could potentially present invalid certificates as valid, undermining the security of systems that rely on proper certificate validation.
Mitigation and Prevention
Protecting systems from CVE-2020-14039 requires immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates