CVE-2019-13561 Explained : Impact and Mitigation
Learn about CVE-2019-13561, a critical vulnerability in D-Link DIR-655 C devices allowing remote code execution. Find out how to mitigate and prevent exploitation.
D-Link DIR-655 C devices before 3.02B05 BETA03 are vulnerable to remote code execution due to a flaw in the online_firmware_check.cgi check_fw_url parameter.
Understanding CVE-2019-13561
This CVE identifies a critical vulnerability in D-Link DIR-655 C devices that allows attackers to execute arbitrary commands remotely.
What is CVE-2019-13561?
The vulnerability in the online_firmware_check.cgi check_fw_url parameter of D-Link DIR-655 C devices enables attackers to exploit shell metacharacters to run unauthorized commands on the affected system.
The Impact of CVE-2019-13561
Exploiting this vulnerability can lead to remote code execution, allowing malicious actors to take control of the device, access sensitive information, or disrupt its normal operation.
Technical Details of CVE-2019-13561
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The flaw in the online_firmware_check.cgi check_fw_url parameter of D-Link DIR-655 C devices allows remote attackers to execute arbitrary commands by manipulating shell metacharacters.
Affected Systems and Versions
- Product: D-Link DIR-655 C devices
- Versions: Prior to 3.02B05 BETA03
Exploitation Mechanism
Attackers exploit shell metacharacters in the online_firmware_check.cgi check_fw_url parameter to inject and execute malicious commands remotely.
Mitigation and Prevention
Protecting systems from CVE-2019-13561 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update the D-Link DIR-655 C devices to version 3.02B05 BETA03 or later to patch the vulnerability.
- Monitor network traffic for any suspicious activities that could indicate exploitation attempts.
Long-Term Security Practices
- Implement network segmentation to limit the impact of potential breaches.
- Regularly audit and update firmware and software to address security vulnerabilities.
Patching and Updates
- Apply security patches provided by D-Link promptly to ensure the protection of the devices against known vulnerabilities.