CVE-2024-28073 in Serv-U
Summary
by MITRE • 04/17/2024
SolarWinds Serv-U was found to be susceptible to a Directory Traversal Remote Code Vulnerability. This vulnerability requires a highly privileged account to be exploited.
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Analysis
by VulDB Data Team • 02/11/2025
The vulnerability identified as CVE-2024-28073 represents a critical directory traversal flaw within SolarWinds Serv-U FTP server software that enables remote code execution under specific conditions. This vulnerability falls under the common weakness enumeration CWE-22 which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw allows attackers to access files and directories outside the intended scope of the application, potentially leading to complete system compromise when combined with appropriate privileges.
The technical implementation of this vulnerability exploits the way Serv-U handles file path resolution during file operations, particularly when processing user-supplied input that is not properly sanitized or validated. Attackers can manipulate file path parameters to navigate beyond the intended directory structure and access sensitive system files, configuration data, or even execute arbitrary code on the target system. The requirement for a highly privileged account to exploit this vulnerability indicates that the attack vector likely involves authentication bypass or privilege escalation techniques that would normally be difficult to achieve without prior access. This privileged requirement suggests the vulnerability may be chained with other weaknesses or require specific administrative credentials to be fully leveraged.
From an operational impact perspective, this vulnerability poses significant risk to organizations utilizing SolarWinds Serv-U as their primary file transfer solution. The combination of remote code execution capability with the requirement for elevated privileges creates a dangerous scenario where attackers who can obtain administrative credentials could potentially gain complete control over the affected systems. The impact extends beyond individual servers to potentially compromise entire network infrastructures, especially when Serv-U servers are used for critical file sharing operations or as part of larger enterprise file transfer architectures. Organizations may face data breaches, system compromise, and potential lateral movement within their networks, making this vulnerability particularly concerning for security operations teams.
Mitigation strategies for CVE-2024-28073 should prioritize immediate patching of affected Serv-U versions according to SolarWinds security advisories and recommendations. Network segmentation and access control measures should be implemented to limit exposure of Serv-U servers to untrusted networks while ensuring that administrative accounts maintain strong authentication mechanisms including multi-factor authentication. The principle of least privilege should be strictly enforced for all Serv-U accounts, particularly administrative ones, with regular audit trails monitoring for suspicious file access patterns. Security monitoring should include detection of unusual file access attempts, directory traversal patterns, and unauthorized privilege escalation activities. Organizations should also consider implementing network-based intrusion detection systems that can identify and block malicious path traversal attempts. The vulnerability's classification under ATT&CK technique T1078 for valid accounts and T1059 for command and scripting interpreter demonstrates the multi-faceted nature of exploitation that requires comprehensive defensive measures across authentication, network, and endpoint security controls.