This vulnerability allows a one-byte out-of-bounds read and daemon crash in ProFTPD before version 1.3.8a. The issue arises from mishandling of quote/backslash semantics in the make_ftp_cmd function located in main.c. The CVSS score of 7.5 indicates a high severity, emphasizing the need for immediate attention from security teams.
Risk to organizations includes potential disruption of services due to daemon crashes, which could result in significant downtime or data availability issues. As this vulnerability can be exploited over the network with low complexity and no user interaction required, it presents a considerable risk.
Organizations should prioritize patching immediately. The vulnerability was published on December 22, 2023, and affects all versions of ProFTPD prior to 1.3.8a. This urgency is underscored by the availability of a known exploit, though none have been confirmed yet.
For additional context, the vulnerability has an EPS score of 0.697 and is in the 99th percentile, indicating a high likelihood of exploitation in the wild. Organizations that utilize ProFTPD should actively monitor for updates and apply patches to safeguard against potential attacks.
Vulnerability Details
The vulnerability found in ProFTPD is classified as a buffer overflow affecting the make_ftp_cmd function. The official CVE description states: 'make_ftp_cmd in main.c in ProFTPD before 1.3.8a has a one-byte out-of-bounds read, and daemon crash, because of mishandling of quote/backslash semantics.' This vulnerability is categorized under CWE-125.
The CVSS score of 7.5 indicates a high severity level, with impacts on availability being rated as high while confidentiality and integrity impacts are rated as none. The attack vector is network-based, requiring no privileges or user interaction, making it easier for attackers to exploit.
Technical Analysis
The root cause of this vulnerability is a failure to properly validate input when handling FTP commands, leading to an out-of-bounds read. The attack vector is through the network, allowing remote attackers to trigger the vulnerability without the need for physical access to the system.
The attack complexity is low as any unauthorized user can exploit this vulnerability without needing special privileges. There is no user interaction required, making it particularly concerning for organizations that rely on ProFTPD for FTP services.
The impact on availability is classified as high, as a successful exploit can lead to service crashes, affecting the availability of FTP services. However, there are no noted impacts on confidentiality or integrity.
Risk & Impact Analysis
Organizations that deploy ProFTPD face significant risks due to this vulnerability. The nature of FTP services means that any downtime can directly affect business operations, leading to potential financial losses and damage to reputation.
With the high likelihood of exploitation, organizations must assess their exposure and implement immediate remediation measures. This includes applying the latest patches and monitoring their systems for any abnormal behavior that could indicate a successful exploit.
Given that this vulnerability is not currently listed as actively exploited in the KEV catalog, organizations still should not underestimate its potential risk. Vigilance is required as details around exploitation may evolve.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
ProFTPD versions prior to 1.3.8a are affected by this vulnerability. Organizations running these versions should take immediate action to upgrade to the latest version to mitigate risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should update ProFTPD to version 1.3.8a or later. If immediate patching is not feasible, consider implementing network controls to limit FTP access and monitor logs for unusual activity.
For further guidance on security testing, organizations may refer to our penetration testing services to validate the effectiveness of their remediation efforts.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for any unexpected daemon crashes or abnormal FTP command patterns. Behavioral anomalies in FTP sessions could indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of input validation within network services. Organizations should regularly review and update their security measures to address vulnerabilities proactively. The patterns observed in this case serve as a reminder of the need for robust security practices, especially in widely used components like ProFTPD.
For further insights on vulnerability management, organizations may explore our guide on vulnerability management programs and the importance of continuous improvement in security posture.
Additionally, organizations should consider engaging in penetration testing methodology to evaluate their defenses against similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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