CVE-2020-13882 : Vulnerability Insights and Analysis
Learn about CVE-2020-13882, an Incorrect Access Control vulnerability in CISOfy Lynis before 3.0.0, allowing local bypass and potential unauthorized file manipulation. Find mitigation steps and best practices for enhanced security.
CISOfy Lynis before 3.0.0 has an Incorrect Access Control vulnerability due to a TOCTOU race condition, allowing local bypass. An unprivileged attacker can manipulate log and report files to execute further attacks.
Understanding CVE-2020-13882
What is CVE-2020-13882?
CISOfy Lynis before version 3.0.0 is susceptible to an Incorrect Access Control vulnerability caused by a TOCTOU race condition.
The Impact of CVE-2020-13882
The vulnerability allows an unprivileged attacker to manipulate log and report files, potentially leading to further attacks.
Technical Details of CVE-2020-13882
Vulnerability Description
The routine to check log and report file permissions in CISOfy Lynis before 3.0.0 can be bypassed locally due to a race condition, enabling unauthorized file manipulation.
Affected Systems and Versions
- Product: CISOfy Lynis
- Vendor: CISOfy
- Versions Affected: Before 3.0.0
Exploitation Mechanism
- An unprivileged attacker can exploit the TOCTOU race condition to set up and control log and report files, allowing for subsequent attacks.
Mitigation and Prevention
Immediate Steps to Take
- Update CISOfy Lynis to version 3.0.0 or later to mitigate the vulnerability.
- Monitor file permissions and access controls to detect any unauthorized changes.
Long-Term Security Practices
- Implement the principle of least privilege to restrict access to sensitive files.
- Regularly audit and review file permissions and access controls to ensure security.
Patching and Updates
- Apply security patches and updates promptly to address known vulnerabilities in software.