CVE-2014-2846 in Arkeia Virtual Appliance
Summary
by MITRE
Directory traversal vulnerability in opt/arkeia/wui/htdocs/index.php in the WD Arkeia virtual appliance (AVA) with firmware before 10.2.9 allows remote attackers to read arbitrary files and execute arbitrary PHP code via a ..././ (dot dot dot slash dot slash) in the lang Cookie parameter, as demonstrated by a request to login/doLogin.
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Analysis
by VulDB Data Team • 05/12/2026
The CVE-2014-2846 vulnerability represents a critical directory traversal flaw in the WD Arkeia virtual appliance software, specifically affecting firmware versions prior to 10.2.9. This vulnerability exists within the web user interface component at the opt/arkeia/wui/htdocs/index.php file path, making it a significant security risk for organizations utilizing this backup solution. The flaw enables remote attackers to exploit a weakness in how the application processes the lang Cookie parameter, allowing unauthorized access to sensitive system files and potential code execution capabilities. The vulnerability manifests when attackers craft malicious requests containing the ..././ pattern in the lang parameter, which bypasses normal input validation mechanisms and permits arbitrary file access. This directory traversal vulnerability specifically impacts the login/doLogin endpoint, suggesting that attackers could potentially compromise authentication mechanisms and gain unauthorized access to the system. The security implications extend beyond simple file reading, as the vulnerability also permits arbitrary PHP code execution, making it a severe threat that could lead to complete system compromise.
The technical exploitation of this vulnerability follows a classic directory traversal attack pattern where the ..././ sequence is used to navigate up directory levels and access files outside the intended web root directory. This type of attack is categorized under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" and aligns with ATT&CK technique T1059.007 for PHP code execution. The flaw demonstrates poor input sanitization and validation practices within the web application, as the lang parameter is not properly filtered or normalized before being processed. Attackers can leverage this vulnerability to read system configuration files, database credentials, application source code, and other sensitive information that should remain protected within the system's restricted directories. The ability to execute arbitrary PHP code through this vector indicates that the vulnerability allows for remote command execution capabilities, potentially enabling attackers to establish persistent access, escalate privileges, or deploy additional malicious payloads.
The operational impact of CVE-2014-2846 extends far beyond simple data exposure, as it provides attackers with a complete pathway to system compromise within the Arkeia virtual appliance environment. Organizations relying on this backup solution face potential data breaches, unauthorized access to backup systems, and possible lateral movement within their network infrastructure. The vulnerability affects the core authentication functionality of the appliance, meaning that successful exploitation could allow attackers to bypass login mechanisms entirely and gain administrative access to the backup system. This poses significant risks for enterprises that depend on the appliance for critical data protection, as compromised backup systems could lead to complete data loss scenarios or provide attackers with access to sensitive backup files. The remote nature of the vulnerability means that attackers do not require physical access or local network presence to exploit it, making it particularly dangerous for network-connected systems. Organizations with multiple Arkeia appliances across their infrastructure face compounded risks, as a single compromised appliance could serve as a foothold for broader network infiltration.
Mitigation strategies for CVE-2014-2846 must address both immediate remediation and long-term security hardening measures. The primary recommendation involves upgrading the WD Arkeia virtual appliance firmware to version 10.2.9 or later, which contains the necessary patches to prevent directory traversal attacks through the lang Cookie parameter. Organizations should also implement network segmentation to limit access to the appliance to only authorized administrative systems and users. Input validation should be strengthened throughout the application to prevent similar vulnerabilities, including implementing proper parameter sanitization and normalization for all user-supplied inputs. Security monitoring should be enhanced to detect suspicious cookie usage patterns and unusual file access attempts. Additionally, organizations should conduct regular security assessments of their backup infrastructure, as this vulnerability demonstrates the importance of securing administrative interfaces and web applications that handle user input. The remediation process should include comprehensive testing to ensure that the firmware upgrade does not disrupt existing backup operations while maintaining the security posture of the system. Network administrators should also consider implementing web application firewalls to provide additional protection against similar directory traversal attacks and establish baseline security configurations that prevent such vulnerabilities from occurring in the first place.