CVE-2021-36182 is a high-severity vulnerability affecting Fortinet's FortiWeb version 6.3.13 and below. This vulnerability allows attackers to exploit improper neutralization of special elements used in a command, known as 'Command Injection'. By sending crafted HTTP requests, unauthorized code can be executed on the affected systems. With a CVSS score of 8.8, this vulnerability poses a significant risk to organizations that rely on FortiWeb for their web application security.
Risk to organizations includes potential unauthorized access to sensitive information, manipulation of data integrity, and disruption of service availability. Given the low attack complexity and the requirement for low privileges, attackers may find it easier to exploit this vulnerability. Organizations should prioritize patching immediately to mitigate the risks.
As of now, there is no public exploit confirmed, and the vulnerability is not currently listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential impact remains high, and organizations should take proactive measures to secure their systems.
Organizations using Fortinet FortiWeb should be aware of this high-severity vulnerability and take immediate action to protect their environments against possible exploitation.
Vulnerability Details
The vulnerability is classified as a command injection, specifically categorized under CWE-78. The CVSS version 3.1 metrics indicate an attack vector of 'NETWORK', a low attack complexity, and a requirement for low privileges. The impacts on confidentiality, integrity, and availability are rated as high, thus emphasizing the critical nature of this vulnerability.
The vulnerability was published on September 8, 2021, and affects FortiWeb versions 6.3.13 and below. Organizations should reference the vendor advisory for further details on mitigation strategies.
Technical Analysis
The root cause of CVE-2021-36182 lies in the improper handling of user input, which leads to command injection vulnerabilities. Attackers can exploit this flaw by sending specially crafted HTTP requests that manipulate server-side commands. Given that the attack complexity is low and user interaction is not required, the threat landscape becomes particularly concerning.
The attack vector is network-based, enabling remote attackers to initiate exploits without physical access to the target system. The low privilege requirement further lowers the barrier for potential exploiters, making it crucial for organizations to apply patches promptly.
Risk & Impact Analysis
The risk to organizations includes unauthorized code execution, which could lead to data breaches, system compromise, and service disruptions. The blast radius potential is significant, as this vulnerability can be exploited across numerous instances of Fortinet FortiWeb appliances deployed in various environments.
Organizations are advised to assess their exposure to this vulnerability based on their deployment of FortiWeb. Given the high CVSS score and the lack of public exploits at this time, the urgency to address this vulnerability should be high.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
FortiWeb versions 6.3.13 and below are affected by this vulnerability. Organizations should ensure they upgrade to the latest available version to mitigate risks effectively.
Mitigation & Remediation
Fortinet has released patches for this vulnerability. Organizations should apply these updates as soon as possible. If a patch is not immediately available, consider implementing network controls to limit exposure. Regular security assessments can further help identify vulnerabilities in the system.
For more information on penetration testing and security assessments, organizations can refer to the penetration testing services offered by AppSecure to identify and remediate such vulnerabilities.
Detection Guidance
Organizations should monitor their logs for any unusual HTTP requests that may indicate an attempt to exploit this vulnerability. Behavioral anomalies in system performance and unexpected changes in user access should also be flagged for further investigation.
AppSecure Threat Intelligence Insight
CVE-2021-36182 highlights the importance of ongoing security assessments and the need for organizations to maintain a proactive security posture. The trend of command injection vulnerabilities continues to pose threats across various technologies, emphasizing the necessity for regular vulnerability assessments and timely patch management.
For more insights into security practices, organizations can explore our articles on penetration testing methodology and vulnerability management program design to strengthen their defenses against such vulnerabilities.
Staying informed on the latest security vulnerabilities and implementing best practices can significantly reduce the attack surface and enhance overall organizational security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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