CVE-2023-33308 : Security Advisory and Response
Learn about CVE-2023-33308, a critical stack-based overflow vulnerability in Fortinet FortiOS and FortiProxy, enabling remote attackers to execute code or commands. Take immediate steps for mitigation.
A stack-based overflow vulnerability in Fortinet FortiOS and FortiProxy versions allows a remote unauthenticated attacker to execute arbitrary code or commands.
Understanding CVE-2023-33308
This CVE identifies a critical vulnerability impacting Fortinet products, enabling attackers to execute malicious code remotely.
What is CVE-2023-33308?
CVE-2023-33308 is a stack-based overflow vulnerability affecting Fortinet FortiOS version 7.0.0 through 7.0.10 and 7.2.0 through 7.2.3, as well as FortiProxy version 7.0.0 through 7.0.9 and 7.2.0 through 7.2.2.
The Impact of CVE-2023-33308
This vulnerability allows remote attackers to execute arbitrary code or commands via carefully crafted packets reaching proxy or firewall policies with proxy mode alongside deep or full packet inspection.
Technical Details of CVE-2023-33308
This section delves into the specific technical aspects of the CVE.
Vulnerability Description
The vulnerability is categorized as a stack-based overflow and is assigned CWE-124. It poses a severe threat by allowing remote unauthenticated attackers to execute arbitrary code or commands.
Affected Systems and Versions
Fortinet's FortiOS versions 7.0.0 through 7.0.10 and 7.2.0 through 7.2.3, and FortiProxy versions 7.0.0 through 7.0.9 and 7.2.0 through 7.2.2 are affected by this vulnerability.
Exploitation Mechanism
Attackers exploit this vulnerability remotely by sending specially crafted packets to systems running the affected versions of Fortinet products.
Mitigation and Prevention
Safeguarding systems against CVE-2023-33308 involves immediate actions and long-term security practices.
Immediate Steps to Take
Immediately upgrade affected systems to the following versions:
- FortiOS version 7.4.0 or above
- FortiOS version 7.2.4 or above
- FortiOS version 7.0.11 or above
- FortiProxy version 7.2.3 or above
- FortiProxy version 7.0.10 or above
Long-Term Security Practices
Implement network segmentation, access controls, and regular security updates to mitigate risks from similar vulnerabilities.
Patching and Updates
Regularly apply security patches and updates provided by Fortinet to ensure protection against known vulnerabilities.