CVE-2021-26096 Explained : Impact and Mitigation

A detailed overview of CVE-2021-26096, a vulnerability found in Fortinet FortiSandbox before version 4.0.0.

Understanding CVE-2021-26096

This CVE describes multiple instances of heap-based buffer overflow in the command shell of FortiSandbox before 4.0.0, enabling an authenticated attacker to manipulate memory through specially crafted command line arguments.

What is CVE-2021-26096?

CVE-2021-26096 is a vulnerability in Fortinet FortiSandbox before version 4.0.0 that allows an authenticated attacker to exploit heap-based buffer overflows in the command shell, potentially altering memory content.

The Impact of CVE-2021-26096

The vulnerability poses a medium severity risk with a CVSS base score of 6.4. Attackers could execute unauthorized code or commands, compromising system integrity.

Technical Details of CVE-2021-26096

Explore the technical aspects of the CVE to understand the affected systems, exploitation mechanism, and recommended mitigations.

Vulnerability Description

The vulnerability results from multiple heap-based buffer overflow flaws in the command shell of FortiSandbox, providing attackers with the ability to modify memory by exploiting specific command line arguments.

Affected Systems and Versions

FortiSandbox versions before 4.0.0 are affected by CVE-2021-26096, exposing systems to the risk of memory manipulation by authenticated attackers.

Exploitation Mechanism

An attacker with authenticated access can leverage specially crafted command line arguments to trigger heap-based buffer overflows, enabling memory manipulation.

Mitigation and Prevention

Understand the immediate steps to address the vulnerability and adopt long-term security practices to safeguard systems against potential exploitation.

Immediate Steps to Take

Organizations are advised to update FortiSandbox to version 4.0.0 or later to mitigate the risk of heap-based buffer overflows and prevent unauthorized memory alterations.

Long-Term Security Practices

Implement robust access controls, conduct regular security assessments, and educate users on secure coding practices to enhance system security and prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Fortinet to address vulnerabilities promptly and ensure the ongoing protection of FortiSandbox systems.