CVE-2023-27993 : Security Advisory and Response
Learn about CVE-2023-27993 published by Fortinet revealing a vulnerability in FortiADC that allows a privileged attacker to delete arbitrary directories. Impact, technical details, affected systems, and mitigation steps included.
This CVE-2023-27993 was published by Fortinet on March 9, 2023, and involves a vulnerability in Fortinet FortiADC. The issue allows a privileged attacker to delete arbitrary directories from the underlying file system through crafted CLI commands.
Understanding CVE-2023-27993
This section will delve into the details of the CVE-2023-27993 vulnerability, its impact, technical description, affected systems, exploitation mechanism, mitigation, and prevention measures.
What is CVE-2023-27993?
The CVE-2023-27993 vulnerability is a relative path traversal (CWE-23) in Fortinet FortiADC version 7.2.0 and below 7.1.1. It enables a privileged attacker to delete arbitrary directories from the underlying file system by exploiting crafted CLI commands.
The Impact of CVE-2023-27993
The impact of this vulnerability is rated as medium severity with a CVSS base score of 5.7. It poses a high availability impact and high integrity impact, requiring high privileges for exploitation, while the attack complexity is low with a local attack vector.
Technical Details of CVE-2023-27993
This section will provide a deeper look into the vulnerability's technical aspects, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability allows a privileged attacker to delete arbitrary directories from the underlying file system by using crafted CLI commands in Fortinet FortiADC versions 7.2.0 and below 7.1.1.
Affected Systems and Versions
The affected versions of Fortinet FortiADC include 7.2.0, 7.1.0 (up to 7.1.1), 7.0.0 (up to 7.0.5), 6.2.0 (up to 6.2.6), 6.1.0 (up to 6.1.6), 6.0.0 (up to 6.0.4), 5.4.0 (up to 5.4.5), 5.3.0 (up to 5.3.7), and 5.2.0 (up to 5.2.8).
Exploitation Mechanism
The vulnerability can be exploited by a privileged attacker through carefully crafted CLI commands to delete arbitrary directories from the file system.
Mitigation and Prevention
In this section, we will discuss the steps to mitigate and prevent the exploitation of CVE-2023-27993.
Immediate Steps to Take
Users are advised to upgrade to FortiADC version 7.2.1 or above or FortiADC version 7.1.2 or above to mitigate the vulnerability and prevent potential attacks.
Long-Term Security Practices
Maintaining regular security updates, implementing access controls, and monitoring CLI command usage can enhance long-term security posture against similar vulnerabilities.
Patching and Updates
Regularly checking for and applying security patches and updates from Fortinet will help in addressing known vulnerabilities and strengthening the overall security of FortiADC systems.