CVE-2020-27862 : Vulnerability Insights and Analysis
Learn about CVE-2020-27862, a high-severity vulnerability in D-Link routers allowing network-adjacent attackers to execute arbitrary code without authentication. Find mitigation steps and preventive measures.
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DVA-2800 and DSL-2888A routers without requiring authentication. The flaw exists within the dhttpd service, enabling attackers to execute code in the context of the web server.
Understanding CVE-2020-27862
This CVE impacts D-Link routers, allowing attackers to execute code without authentication.
What is CVE-2020-27862?
CVE-2020-27862 is a vulnerability that permits network-adjacent attackers to run arbitrary code on affected D-Link routers without needing authentication. The flaw lies in the dhttpd service, which does not properly validate user-supplied strings, leading to code execution.
The Impact of CVE-2020-27862
- CVSS Base Score: 8.8 (High)
- Attack Vector: Adjacent Network
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Privileges Required: None
Technical Details of CVE-2020-27862
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows attackers to execute arbitrary code on D-Link DVA-2800 and DSL-2888A routers due to improper validation of user-supplied strings in the dhttpd service.
Affected Systems and Versions
- Affected Product: Multiple Routers
- Vendor: D-Link
- Affected Version: Firmware version 2.3
Exploitation Mechanism
Attackers exploit the vulnerability by sending a malicious request to the dhttpd service on TCP port 8008, leveraging the lack of proper validation to execute arbitrary code.
Mitigation and Prevention
Protecting systems from CVE-2020-27862 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update affected routers to the latest firmware version.
- Implement network segmentation to limit exposure to adjacent network attacks.
- Monitor network traffic for any suspicious activities.
Long-Term Security Practices
- Regularly update and patch all network devices.
- Conduct security assessments and penetration testing to identify vulnerabilities.
- Educate users on safe browsing habits and phishing awareness.
Patching and Updates
- Apply patches provided by D-Link to address the vulnerability.