CVE-2020-15415 : What You Need to Know
Learn about CVE-2020-15415 affecting DrayTek Vigor3900, Vigor2960, and Vigor300B devices. Understand the impact, technical details, and mitigation steps for this remote command execution vulnerability.
DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 are vulnerable to remote command execution via shell metacharacters in a specific content type.
Understanding CVE-2020-15415
This CVE identifies a security vulnerability in DrayTek devices that allows remote command execution.
What is CVE-2020-15415?
This CVE pertains to a flaw in the cgi-bin/mainfunction.cgi/cvmcfgupload feature on DrayTek devices, enabling attackers to execute commands remotely using shell metacharacters in a filename with the text/x-python-script content type.
The Impact of CVE-2020-15415
The vulnerability can be exploited by malicious actors to execute arbitrary commands on affected devices, potentially leading to unauthorized access, data theft, or further compromise of the system.
Technical Details of CVE-2020-15415
DrayTek Vigor devices are susceptible to remote command execution due to improper input validation.
Vulnerability Description
The flaw in cgi-bin/mainfunction.cgi/cvmcfgupload allows attackers to inject shell metacharacters in filenames, leading to unauthorized command execution.
Affected Systems and Versions
- DrayTek Vigor3900, Vigor2960, and Vigor300B devices before version 1.5.1
Exploitation Mechanism
Attackers can exploit this vulnerability by uploading a file with malicious shell metacharacters in the filename when using the text/x-python-script content type.
Mitigation and Prevention
It is crucial to take immediate action to secure vulnerable DrayTek devices.
Immediate Steps to Take
- Update affected devices to version 1.5.1 or later to patch the vulnerability
- Monitor network traffic for any suspicious activity
- Implement strong access controls and firewall rules
Long-Term Security Practices
- Regularly update firmware and security patches
- Conduct security audits and penetration testing to identify vulnerabilities
Patching and Updates
- DrayTek has released version 1.5.1 to address this vulnerability
- Regularly check for firmware updates and apply them promptly to ensure the security of the devices