CVE-2021-27255 : What You Need to Know

This CVE-2021-27255 article provides detailed information about a vulnerability affecting NETGEAR R7800 firmware version 1.0.2.76 that allows remote attackers to execute arbitrary code without authentication.

Understanding CVE-2021-27255

This section delves into the specifics of the CVE-2021-27255 vulnerability and its impact on affected systems.

What is CVE-2021-27255?

CVE-2021-27255 is a vulnerability in NETGEAR R7800 firmware version 1.0.2.76 that enables remote attackers to run arbitrary code without requiring authentication. The flaw resides in the refresh_status.aspx endpoint.

The Impact of CVE-2021-27255

The impact of CVE-2021-27255 includes the execution of code in the context of root by exploiters, highlighting the severity of this vulnerability.

Technical Details of CVE-2021-27255

This section dives into the technical aspects of CVE-2021-27255, including the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in refresh_status.aspx allows attackers to start a service on the server without authentication, granting them root code execution capabilities.

Affected Systems and Versions

NETGEAR R7800 firmware version 1.0.2.76 is specifically affected by this vulnerability, putting installations at risk of arbitrary code execution.

Exploitation Mechanism

Exploiting CVE-2021-27255 does not require authentication, enabling remote attackers to execute code in the context of root, potentially leading to unauthorized system access.

Mitigation and Prevention

In the face of CVE-2021-27255, taking immediate steps and implementing long-term security practices are crucial to safeguard affected systems.

Immediate Steps to Take

Users should apply vendor-provided patches promptly, restrict network access to vulnerable devices, and monitor for any suspicious activity.

Long-Term Security Practices

Implementing network segmentation, enforcing the principle of least privilege, and regularly updating firmware can enhance the security posture of systems against potential threats.

Patching and Updates

Staying informed about security advisories, regularly checking for updates from NETGEAR, and applying patches promptly are essential to mitigate the risk posed by CVE-2021-27255.