CVE-2021-20852 : Vulnerability Insights and Analysis
Learn about CVE-2021-20852, a buffer overflow vulnerability impacting ELECOM LAN routers. Understand the risk, impact, and mitigation steps for this security issue.
This CVE-2021-20852 involves a buffer overflow vulnerability in ELECOM LAN routers, specifically affecting WRH-733GBK firmware v1.02.9 and earlier, as well as WRH-733GWH firmware v1.02.9 and earlier. An attacker with network access and administrator privileges can exploit this vulnerability to execute arbitrary OS commands.
Understanding CVE-2021-20852
This section will delve into the details of the CVE-2021-20852 vulnerability.
What is CVE-2021-20852?
The CVE-2021-20852 is a buffer overflow vulnerability found in ELECOM LAN routers. It enables a network-adjacent attacker with administrative privileges to run unauthorized OS commands via unspecified vectors.
The Impact of CVE-2021-20852
The impact of this vulnerability is significant as it allows an attacker to execute arbitrary commands on the affected routers, potentially leading to unauthorized access and control.
Technical Details of CVE-2021-20852
In this section, we will explore the technical aspects of CVE-2021-20852.
Vulnerability Description
The vulnerability lies in a buffer overflow issue within ELECOM LAN routers, specifically in the WRH-733GBK and WRH-733GWH firmware versions mentioned. Attackers can leverage this flaw to execute malicious commands.
Affected Systems and Versions
ELECOM LAN routers running WRH-733GBK firmware v1.02.9 and prior, along with WRH-733GWH firmware v1.02.9 and prior, are impacted by this vulnerability.
Exploitation Mechanism
The exploitation of CVE-2021-20852 occurs through a network-adjacent attacker who possesses administrator privileges, leveraging the buffer overflow to execute unauthorized OS commands.
Mitigation and Prevention
This section focuses on the steps to mitigate and prevent the exploitation of CVE-2021-20852.
Immediate Steps to Take
Immediately update the firmware of the affected ELECOM LAN routers to secure them against this vulnerability. Implement network security measures to restrict unauthorized access.
Long-Term Security Practices
Regularly monitor security advisories and patches from ELECOM CO.,LTD. to stay informed about the latest updates and vulnerabilities. Conduct periodic security assessments to identify and address potential risks.
Patching and Updates
Apply patches and updates provided by ELECOM CO.,LTD. promptly to address known vulnerabilities and enhance the overall security posture of the ELECOM LAN routers.