CVE-2024-23692 is a critical vulnerability affecting Rejetto HTTP File Server (HFS) versions up to and including 2.3m. This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request. The CVSS score of 9.8 signifies a critical severity level, indicating that this vulnerability poses a serious risk to organizations using this software.
Risk to organizations includes potential unauthorized access to sensitive data, disruption of services, and complete system compromise. As of the CVE assignment date, Rejetto HFS 2.3m is no longer supported, which exacerbates the risk, as no patches or updates are available to remediate this vulnerability.
The urgency for defenders is high due to the nature of the exploit and the availability of known exploits. Organizations should prioritize patching immediately.
As of now, there are confirmed exploits available, and the vulnerability is included in the Known Exploited Vulnerabilities (KEV) catalog, indicating that active exploitation is likely.
Vulnerability Details
The Rejetto HTTP File Server, up to and including version 2.3m, is vulnerable to a template injection vulnerability. This vulnerability allows an attacker to send specially crafted HTTP requests that can execute arbitrary commands on the server. The official CVE description highlights the lack of support for version 2.3m, which poses significant risks to users still operating this version.
This vulnerability is classified under CWE-1336 (Improper Neutralization of Special Elements Used in a Template Engine) and CWE-94 (Code Injection).
With a CVSS score of 9.8, the vulnerability is rated as critical, indicating a high potential for damage if exploited. The vulnerability affects products under the vendor Rejetto, specifically the HTTP File Server component.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of user input within the template engine of the HTTP File Server. Attackers may leverage this flaw via the network, with low attack complexity and no privileges required, meaning that even unauthenticated users can exploit it.
The attack vector is network-based, allowing remote exploitation. The attack complexity is low, requiring no special conditions or user interaction, making it particularly dangerous. The impacts are severe, with high confidentiality, integrity, and availability impacts, potentially leading to full system compromise.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2024-23692 is significant, especially for organizations still using the vulnerable version of the Rejetto HTTP File Server. The lack of support for version 2.3m means that users are exposed to known exploits without any available patches. This situation leads to a high blast radius potential, where a single exploitation could lead to widespread unauthorized access across affected systems.
Organizations should assess their exposure to this vulnerability and take immediate action to mitigate risks. The critical CVSS score, alongside its inclusion in the KEV catalog, indicates that this vulnerability is actively being exploited in the wild, requiring urgent attention from security teams.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected. Specifically, versions up to and including Rejetto HTTP File Server 2.3m are vulnerable.
Mitigation & Remediation
Organizations are advised to apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. The patched Rejetto HTTP File Server (HFS) is version 3, which can be found on the official website. Regular updates and monitoring for vulnerabilities are critical.
For further assistance, organizations may consider engaging in penetration testing to uncover similar vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual HTTP request patterns, check for unauthorized command executions, and keep an eye on system changes that could indicate compromise.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-23692 highlights the increasing sophistication of template injection vulnerabilities and their implications for system security. Security teams should learn from this incident to enhance their defensive strategies.
Organizations should implement robust security controls, including regular security assessments and penetration testing methodology, to address vulnerabilities proactively.
Additionally, this vulnerability serves as a reminder of the importance of maintaining software updates and support channels. As technology evolves, so must the strategies employed to mitigate threats.
For further reading on similar threats, organizations can explore our insights on vulnerability management programs and best practices for securing application infrastructures.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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