CVE-2020-36254 : Exploit Details and Defense Strategies
Learn about CVE-2020-36254, a vulnerability in Dropbear before 2020.79 that mishandles filenames, potentially leading to security risks. Find out how to mitigate and prevent this issue.
Dropbear before 2020.79 mishandles the filename of . or an empty filename, leading to a vulnerability related to CVE-2018-20685.
Understanding CVE-2020-36254
This CVE entry describes a specific vulnerability in Dropbear.
What is CVE-2020-36254?
Dropbear's scp.c component prior to version 2020.79 incorrectly processes filenames, potentially exposing a security flaw.
The Impact of CVE-2020-36254
The mishandling of filenames in Dropbear could result in security vulnerabilities, allowing malicious actors to exploit the system.
Technical Details of CVE-2020-36254
Dropbear's vulnerability in handling filenames has specific technical aspects.
Vulnerability Description
The issue arises from scp.c in Dropbear before version 2020.79, where filenames such as '.' or an empty filename are not properly managed.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before 2020.79
Exploitation Mechanism
Malicious actors could potentially exploit this vulnerability by manipulating filenames to execute unauthorized actions.
Mitigation and Prevention
Protecting systems from CVE-2020-36254 requires specific actions.
Immediate Steps to Take
- Update Dropbear to version 2020.79 or later to mitigate the vulnerability.
- Monitor system logs for any suspicious activities related to filename manipulation.
Long-Term Security Practices
- Regularly update software and apply security patches to prevent known vulnerabilities.
- Implement file integrity monitoring to detect unauthorized changes to filenames.
Patching and Updates
Ensure timely installation of software updates and security patches to address vulnerabilities like the one in Dropbear before 2020.79.