CVE-2024-47266 in Active Backup for Business
Summary
by MITRE • 02/13/2025
Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in share file list functionality in Synology Active Backup for Business before 2.7.1-13234, 2.7.1-23234 and 2.7.1-3234 allows remote authenticated users with administrator privileges to read specific files containing non-sensitive information via unspecified vectors.
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Analysis
by VulDB Data Team • 02/26/2026
The vulnerability identified as CVE-2024-47266 represents a critical path traversal flaw within Synology Active Backup for Business software, specifically affecting versions prior to 2.7.1-13234, 2.7.1-23234, and 2.7.1-3234. This issue falls under the CWE-22 category, which defines path traversal vulnerabilities as a fundamental weakness in software design that allows attackers to access files and directories outside of the intended restricted paths. The vulnerability manifests within the share file list functionality, where the application fails to properly validate and sanitize user-supplied input that could potentially manipulate file system paths. This flaw enables malicious actors to exploit the system's file access mechanisms and retrieve unauthorized files, despite the system's intended security boundaries.
The technical implementation of this vulnerability stems from inadequate input validation and path sanitization within the file listing component of the Active Backup for Business application. When administrators interact with the share file list functionality, the system processes user-provided path parameters without sufficient restrictions or normalization, allowing attackers to manipulate directory traversal sequences such as "../" or similar path manipulation techniques. This weakness creates an opportunity for attackers to bypass normal file system access controls and navigate to arbitrary locations within the system's file hierarchy. The vulnerability specifically affects authenticated users who possess administrator privileges, which significantly reduces the attack surface but does not eliminate the risk entirely since administrative credentials are often targeted in enterprise environments.
The operational impact of CVE-2024-47266 extends beyond simple unauthorized file access, as it represents a significant escalation path for attackers who have already gained administrative access to the system. While the vulnerability description indicates that only non-sensitive information can be read, the potential for data exfiltration remains substantial, particularly in enterprise environments where backup systems often contain sensitive organizational data. The attack vector involves leveraging the existing administrative privileges to perform unauthorized file system operations, which could potentially expose configuration files, log data, or other information that might aid in further attacks. This vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers might use the information gained to craft more sophisticated social engineering attacks or identify additional system weaknesses.
Organizations utilizing Synology Active Backup for Business must implement immediate mitigations to address this vulnerability, beginning with the mandatory upgrade to the patched versions 2.7.1-13234, 2.7.1-23234, or 2.7.1-3234. Additionally, administrators should conduct comprehensive security reviews of their backup systems, implementing network segmentation to limit access to critical backup infrastructure and ensuring that administrative accounts follow strict credential management practices. The vulnerability demonstrates the importance of input validation and proper access control enforcement, particularly within applications that handle file system operations. Security teams should also consider implementing file integrity monitoring solutions to detect unauthorized file access patterns and establish regular vulnerability assessments to identify similar weaknesses in other enterprise backup and recovery systems. The incident underscores the necessity of maintaining up-to-date security patches and the critical role that proper input validation plays in preventing privilege escalation and unauthorized data access scenarios.