CVE-2019-12210 : What You Need to Know
Discover the impact of CVE-2019-12210 in Yubico pam-u2f version 1.0.7. Learn about the vulnerability allowing file descriptor inheritance, potential data leakage, and mitigation steps.
In the Yubico pam-u2f version 1.0.7, a vulnerability exists where the debug mode, when enabled with a custom debug log file, fails to properly close the file descriptor when a new process is created. This flaw can lead to the leakage of sensitive information and potential disk manipulation.
Understanding CVE-2019-12210
This CVE entry highlights a security issue in the Yubico pam-u2f version 1.0.7.
What is CVE-2019-12210?
The vulnerability in Yubico pam-u2f version 1.0.7 allows a child process to inherit the file descriptor associated with the debug log file, potentially leading to information leakage and unauthorized file manipulation.
The Impact of CVE-2019-12210
The exploitation of this vulnerability can result in the exposure of sensitive data, unauthorized access to log files, disk space exhaustion, and the insertion of false information into log files.
Technical Details of CVE-2019-12210
This section delves into the technical aspects of the CVE.
Vulnerability Description
In Yubico pam-u2f 1.0.7, the failure to close the file descriptor when spawning a new process allows the child process to read from and write to the log file, potentially compromising sensitive information.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Version: 1.0.7 (affected)
Exploitation Mechanism
The vulnerability arises when debug mode is enabled, and a custom debug log file is specified. The improper closure of the file descriptor during process creation enables the child process to inherit the descriptor, leading to potential data leakage and file manipulation.
Mitigation and Prevention
Protecting systems from CVE-2019-12210 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable debug mode if not essential for operations
- Regularly monitor log files for unauthorized access
- Implement file integrity checks to detect tampering
Long-Term Security Practices
- Conduct regular security audits and code reviews
- Educate personnel on secure coding practices
- Implement least privilege access controls
Patching and Updates
- Apply patches provided by the vendor promptly
- Stay informed about security advisories and updates from Yubico