CVE-2018-5371 Explained : Impact and Mitigation
Learn about CVE-2018-5371 affecting D-Link DSL-2640U & DSL-2540U routers. Find out how authenticated attackers can execute arbitrary OS commands and steps to mitigate the risk.
D-Link DSL-2640U and DSL-2540U devices are vulnerable to arbitrary OS command execution through the diag_ping.cmd command.
Understanding CVE-2018-5371
This CVE involves a vulnerability in specific D-Link router models that allows authenticated remote attackers to execute arbitrary OS commands.
What is CVE-2018-5371?
The vulnerability in D-Link DSL-2640U and DSL-2540U devices enables attackers to run arbitrary OS commands by exploiting shell metacharacters in an HTTP GET request.
The Impact of CVE-2018-5371
This vulnerability can be exploited by authenticated remote attackers, potentially leading to unauthorized access, data theft, or further network compromise.
Technical Details of CVE-2018-5371
The technical aspects of this CVE are as follows:
Vulnerability Description
- Vulnerability in diag_ping.cmd command on D-Link DSL-2640U and DSL-2540U devices
- Allows authenticated remote attackers to execute arbitrary OS commands
Affected Systems and Versions
- D-Link DSL-2640U devices with IM_1.00 and ME_1.00 firmware
- DSL-2540U devices with ME_1.00 firmware
Exploitation Mechanism
- Attackers utilize shell metacharacters in the ipaddr field of an HTTP GET request to execute arbitrary OS commands
Mitigation and Prevention
To address CVE-2018-5371, consider the following steps:
Immediate Steps to Take
- Update firmware to the latest version provided by D-Link
- Restrict access to the router to trusted users only
Long-Term Security Practices
- Regularly monitor network traffic for suspicious activities
- Implement strong authentication mechanisms for router access
Patching and Updates
- Stay informed about security updates from D-Link and apply patches promptly