CVE-2019-10891 Explained : Impact and Mitigation
Learn about CVE-2019-10891, a vulnerability in D-Link DIR-806 devices allowing remote attackers to execute arbitrary shell commands. Find out how to mitigate and prevent this security risk.
A vulnerability has been identified in D-Link DIR-806 devices that allows remote attackers to execute arbitrary shell commands through a specially crafted HTTP header.
Understanding CVE-2019-10891
This CVE involves a command injection issue in the hnap_main function of D-Link DIR-806 devices.
What is CVE-2019-10891?
The vulnerability in the hnap_main function of D-Link DIR-806 devices enables remote attackers to execute arbitrary shell commands by manipulating a parameter in a system() command.
The Impact of CVE-2019-10891
Remote attackers can exploit this vulnerability by sending a specifically crafted HTTP header, gaining unauthorized access to execute arbitrary shell commands on the affected device.
Technical Details of CVE-2019-10891
This section provides more technical insights into the vulnerability.
Vulnerability Description
The issue lies in the hnap_main function of D-Link DIR-806 devices, where the system() command is called without proper validation of a user-controllable parameter, leading to command injection.
Affected Systems and Versions
- Product: D-Link DIR-806
- Vendor: D-Link
- Versions: All versions are affected
Exploitation Mechanism
Remote attackers can exploit this vulnerability by sending a specially crafted HTTP header to the affected device, allowing them to execute arbitrary shell commands.
Mitigation and Prevention
Protecting against and preventing exploitation of CVE-2019-10891 is crucial.
Immediate Steps to Take
- Apply vendor-supplied patches or updates promptly.
- Implement network segmentation to limit access to vulnerable devices.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all devices and software in the network.
- Conduct security assessments and penetration testing to identify vulnerabilities.
- Educate users on safe browsing habits and security best practices.
Patching and Updates
Ensure that all D-Link DIR-806 devices are updated with the latest patches and firmware releases to mitigate the risk of exploitation.