CVE-2024-52390 in CYAN Backup Plugin
Summary
by MITRE • 11/19/2024
: Path Traversal: '.../...//' vulnerability in CYAN Backup allows Path Traversal.This issue affects CYAN Backup: from n/a through 2.5.3.
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Analysis
by VulDB Data Team • 11/19/2024
The CVE-2024-52390 vulnerability represents a critical path traversal flaw within CYAN Backup software versions ranging from an unspecified initial version through 2.5.3. This security weakness enables attackers to manipulate file paths and access unauthorized directories within the system's file structure. The vulnerability specifically manifests through the exploitation of directory traversal sequences such as '..././/', which can be appended to file requests to bypass normal access controls and potentially gain access to sensitive system files, configuration data, or user information. The flaw resides in how the backup software processes file path inputs, failing to properly validate or sanitize user-supplied path components that contain traversal sequences. This type of vulnerability falls under the broader category of CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is classified as a common weakness in software security implementations. The attack vector typically involves an authenticated user or attacker who can submit malicious file path requests to the backup system, potentially leading to unauthorized data access or system compromise.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can enable attackers to escalate privileges and potentially execute arbitrary code within the backup environment. When exploited successfully, the path traversal vulnerability allows adversaries to navigate through the file system hierarchy and access files that should remain protected, including system configuration files, database backups, or even sensitive user data stored within the backup repository. The vulnerability's severity is heightened by the fact that it affects multiple versions of the CYAN Backup software, indicating a persistent flaw in the application's input validation mechanisms. Attackers could leverage this weakness to extract critical system information, modify backup files, or potentially gain access to underlying storage systems where backup data is maintained. The impact on system integrity and data confidentiality is substantial, particularly in enterprise environments where backup systems often contain sensitive operational data and are critical to business continuity.
Mitigation strategies for CVE-2024-52390 should prioritize immediate patching of affected CYAN Backup installations to version 2.5.4 or later, which contains the necessary fixes for path traversal validation. Organizations should implement strict input validation and sanitization measures to prevent traversal sequences from being processed within file path operations, particularly when handling user-supplied data. The implementation of proper access controls and least privilege principles should be enforced to limit the impact of any successful exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all instances of the affected software within their environment and ensure that proper network segmentation prevents unauthorized access to backup systems. Additionally, monitoring and logging mechanisms should be enhanced to detect suspicious file access patterns or attempts to traverse directory structures, which can serve as early indicators of exploitation attempts. This vulnerability aligns with ATT&CK technique T1074.001 - Data Staged, as it enables attackers to access and potentially exfiltrate staged backup data through unauthorized file system access. Organizations should also consider implementing web application firewalls and input validation rules to prevent malicious path traversal sequences from reaching the application layer, thereby reducing the attack surface and providing defense-in-depth protection against similar vulnerabilities.