CVE-2020-14511 Explained : Impact and Mitigation
Learn about CVE-2020-14511, a vulnerability in EDR-G902 and EDR-G903 Series Routers (versions prior to 5.4) that allows attackers to trigger a stack-based buffer overflow through a crafted web browser cookie.
A stack-based buffer overflow vulnerability in EDR-G902 and EDR-G903 Series Routers (versions prior to 5.4) can be exploited through a crafted web browser cookie.
Understanding CVE-2020-14511
Malicious actors can trigger a stack-based buffer overflow in the system web server of affected routers by manipulating a specific web browser cookie.
What is CVE-2020-14511?
The vulnerability allows attackers to execute arbitrary code or crash the system by overwriting the stack memory beyond its allocated space.
The Impact of CVE-2020-14511
Exploitation of this vulnerability could lead to a denial of service (DoS) condition, remote code execution, or system compromise.
Technical Details of CVE-2020-14511
The following technical aspects provide insight into the vulnerability.
Vulnerability Description
The flaw arises from improper handling of web browser cookies, resulting in a stack-based buffer overflow in the system web server.
Affected Systems and Versions
- Product: EDR-G902 and EDR-G903 Series Routers
- Versions Affected: Prior to 5.4
Exploitation Mechanism
Attackers can exploit the vulnerability by sending a specially crafted web browser cookie to the affected routers, triggering the buffer overflow.
Mitigation and Prevention
Protecting systems from CVE-2020-14511 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply vendor-supplied patches or updates to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation.
- Implement strong network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch all software and firmware on network devices.
- Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.
- Educate users and administrators about safe browsing practices and security awareness.
Patching and Updates
Ensure that all EDR-G902 and EDR-G903 Series Routers are updated to version 5.4 or later to eliminate the vulnerability.