CVE-2015-7245 in DVGN5402SP
Summary
by MITRE
Directory traversal vulnerability in DLink DVGN5402SP with firmware W1000CN00, W1000CN03, or W2000EN00 allows remote attackers to read sensitive information via a .. (dot dot) in the errorpage parameter.
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Analysis
by VulDB Data Team • 06/20/2024
The CVE-2015-7245 vulnerability represents a critical directory traversal flaw in D-Link DVGN5402SP wireless routers running specific firmware versions including W1000CN00, W1000CN03, and W2000EN00. This vulnerability falls under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw exists in the router's web interface implementation where input validation is insufficiently enforced for the errorpage parameter, allowing malicious actors to manipulate file paths and access sensitive system files that should remain protected from unauthorized access.
The technical exploitation of this vulnerability occurs through a simple yet effective method involving the use of dot-dot-slash sequences in the errorpage parameter of the web interface. When an attacker crafts a malicious request containing sequences such as ../../../etc/passwd or similar path traversal patterns, the vulnerable router fails to properly sanitize this input before processing. This allows the attacker to navigate through the file system hierarchy and retrieve confidential information including but not limited to system configuration files, user credentials, and other sensitive data that should only be accessible to authorized administrators. The vulnerability specifically affects the router's error handling mechanism where the errorpage parameter is directly used in file operations without proper validation or sanitization.
The operational impact of this vulnerability extends beyond simple information disclosure, creating significant security risks for networks utilizing affected D-Link devices. Remote attackers can leverage this weakness to gain unauthorized access to critical system information, potentially leading to further exploitation opportunities such as privilege escalation or complete system compromise. The vulnerability is particularly dangerous because it requires no authentication to exploit, making it accessible to anyone who can reach the router's web interface. This exposure creates a substantial risk for enterprise and home networks where these routers are deployed, as attackers can systematically enumerate and extract sensitive data from the affected devices without requiring physical access or prior credentials.
Security professionals should consider this vulnerability in the context of the MITRE ATT&CK framework, specifically under the T1083 technique for discovering system information and potentially T1566 for initial access through network services. The vulnerability demonstrates a classic example of how inadequate input validation in web applications can lead to severe information disclosure risks. Organizations should implement immediate mitigations including firmware updates from D-Link, network segmentation to limit access to administrative interfaces, and monitoring for suspicious requests containing path traversal sequences. Additionally, implementing web application firewalls and input validation controls at the network perimeter can provide additional layers of protection against exploitation attempts. The vulnerability highlights the importance of proper secure coding practices and input validation in embedded systems and network devices where attackers may have direct access to web-based administrative interfaces.