CVE-2023-46715 is a medium-severity vulnerability in Fortinet FortiOS, specifically affecting the IPSec VPN versions 7.4.0 through 7.4.1 and version 7.2.6 and below. This vulnerability allows an authenticated IPSec VPN user with dynamic IP addressing to send packets that spoof the IP address of another user. However, the affected users cannot receive these crafted packets.
The vulnerability is classified as an origin validation error, identified by CWE-346. The CVSS score for this vulnerability is 5, indicating a medium severity level. Organizations using the affected versions of FortiOS should be aware of the potential impact, as attackers may leverage this vulnerability to conduct unauthorized activities.
Risk to organizations includes the possibility of gaining unauthorized access to sensitive information or systems, even though the actual impact may be limited to spoofing activities. Organizations should prioritize patching this vulnerability to mitigate the associated risks.
Patching is critical because the vulnerability is present in widely used versions of FortiOS, which may expose many organizations to attacks. Organizations should address this vulnerability in their priority patch cycle.
Vulnerability Details
The official CVE description states that this vulnerability allows an authenticated IPSec VPN user to send crafted network packets that can spoof the IP of another user. The attack vector is network-based, and the complexity is low, requiring only low privileges and no user interaction. The confidentiality impact is none, while the integrity impact is low, and the availability impact is none.
The affected product is Fortinet FortiOS, specifically the IPSec VPN versions 7.4.0 through 7.4.1 and version 7.2.6 and below. The vulnerability was published on January 14, 2025.
Technical Analysis
The root cause of CVE-2023-46715 is an origin validation error that allows an authenticated user to send packets with a spoofed IP address. The attack vector is network-based, meaning attackers can exploit this vulnerability remotely. The complexity of the attack is low, as it requires low privileges and no user interaction, making it relatively easy for attackers to leverage this vulnerability once they have authenticated access.
The confidentiality impact of this vulnerability is none, indicating that no sensitive information can be compromised through the spoofing. However, the integrity impact is low, meaning that while the spoofing may not directly threaten data integrity, it can lead to confusion and potential unauthorized actions within the network.
Risk & Impact Analysis
Real-world deployment risk associated with CVE-2023-46715 centers around the potential for attackers to impersonate legitimate users. This can lead to unauthorized access to sensitive data or resources, particularly in environments where IP address validation is critical for security measures.
The urgency assessment based on the medium CVSS score indicates that organizations should schedule remediation of this vulnerability. The potential blast radius is significant, especially for organizations heavily relying on FortiOS for their VPN services.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects Fortinet FortiOS IPSec VPN versions 7.4.0 through 7.4.1 and version 7.2.6 and below. Organizations should ensure they are running versions that have received the necessary patches.
Mitigation & Remediation
Organizations should promptly apply any available patches or updates to mitigate this vulnerability. It is essential to upgrade to the latest version of FortiOS that addresses this specific issue. In cases where patching is not immediately possible, organizations should consider implementing network controls and monitoring for unusual activities that might indicate exploitation attempts.
Detection Guidance
To detect potential exploitation of CVE-2023-46715, organizations should monitor logs for unusual packet patterns that may indicate spoofing attempts. Behavioral anomalies in network traffic, especially from authenticated users, should be investigated. Additionally, network signatures can be implemented to identify malicious traffic associated with this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-46715 lies in its demonstration of vulnerabilities related to origin validation, which can often lead to serious security issues if left unaddressed. Security teams should recognize the patterns of origin validation errors and proactively implement measures to prevent such vulnerabilities in the future. This incident underscores the importance of rigorous security testing and validation processes.
Penetration testing can help organizations identify similar weaknesses in their systems before they can be exploited.
Application security assessments are also crucial in ensuring that all components are secure against potential attacks.
Red teaming services can provide an additional layer of assurance by simulating real-world attack scenarios.
Organizations should remain vigilant and continually assess their security posture to defend against evolving threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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