CVE-2020-13131 Explained : Impact and Mitigation
Discover the impact of CVE-2020-13131, a vulnerability in Yubico libykpiv before 2.1.0, allowing leakage of sensitive information during RSA key generation. Learn about affected systems and mitigation steps.
An issue was discovered in Yubico libykpiv before 2.1.0, where a vulnerability in lib/util.c could lead to sensitive information leakage.
Understanding CVE-2020-13131
What is CVE-2020-13131?
CVE-2020-13131 is a vulnerability in Yubico libykpiv before version 2.1.0, impacting the handling of embedded length fields during device communication.
The Impact of CVE-2020-13131
The vulnerability allows a malicious PIV token to manipulate length fields during RSA key generation, potentially leaking sensitive information like PINs, passwords, and key material.
Technical Details of CVE-2020-13131
Vulnerability Description
The issue arises from improper checking of embedded length fields in lib/util.c, leading to memory leakage of sensitive data.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Physical
- Confidentiality Impact: High
- Integrity Impact: None
- Privileges Required: None
- User Interaction: Required
Mitigation and Prevention
Immediate Steps to Take
- Update to Yubico libykpiv version 2.1.0 or later.
- Monitor for any unauthorized access or unusual activities.
Long-Term Security Practices
- Regularly review and update security protocols.
- Educate users on safe handling of cryptographic tokens.
Patching and Updates
- Apply patches and updates promptly to mitigate known vulnerabilities.