CVE-2021-35032 : Vulnerability Insights and Analysis

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.

Understanding CVE-2021-35032

This section provides detailed insights into the CVE-2021-35032 vulnerability affecting Zyxel GS1900 series firmware version 2.60.

What is CVE-2021-35032?

The CVE-2021-35032 vulnerability involves improper neutralization of special elements used in an OS command (OS Command Injection) in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60.

The Impact of CVE-2021-35032

With a base CVSS score of 6.4, this vulnerability has a medium severity level. An authenticated local user can exploit this flaw to execute arbitrary OS commands, potentially leading to confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-35032

In this section, we dive into the technical aspects of CVE-2021-35032.

Vulnerability Description

The vulnerability lies in the 'libsal.so' file within the Zyxel GS1900 series firmware version 2.60, allowing malicious users to run unauthorized OS commands via a manipulated function call.

Affected Systems and Versions

Zyxel GS1900 series firmware version 2.60 is specifically affected by this vulnerability. Users running this exact version should take immediate action.

Exploitation Mechanism

This vulnerability requires an authenticated local user, which limits the potential exploitation to individuals with existing access to the system. By crafting a specific function call, attackers can execute malicious OS commands.

Mitigation and Prevention

Protecting systems from CVE-2021-35032 is crucial to maintain security. Learn how to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

Zyxel GS1900 series firmware version 2.60 users should consider updating to a patched version, if available. Monitoring for any unusual activities on the network is also recommended.

Long-Term Security Practices

Implementing strong authentication mechanisms and continuously monitoring for suspicious activities can enhance the overall security posture of the system.

Patching and Updates

Stay informed about security updates and patches released by Zyxel. Promptly apply any patches provided to address CVE-2021-35032 and other potential vulnerabilities.