CVE-2013-4857 in DIR-865L
Summary
by MITRE
D-Link DIR-865L has PHP File Inclusion in the router xml file.
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Analysis
by VulDB Data Team • 01/27/2024
The CVE-2013-4857 vulnerability affects D-Link DIR-865L routers and represents a critical server-side include flaw that allows remote attackers to execute arbitrary code through maliciously crafted requests. This vulnerability stems from improper input validation within the router's web interface, specifically in how it processes XML configuration files. The issue manifests when the device fails to properly sanitize user-supplied input before incorporating it into PHP execution contexts, creating a pathway for malicious actors to inject and execute arbitrary PHP code on the affected device.
The technical implementation of this vulnerability involves the exploitation of a file inclusion mechanism that accepts XML data from remote clients without adequate validation or sanitization. Attackers can craft specially formatted XML requests that manipulate the router's processing logic to include and execute malicious PHP scripts stored on remote servers. This type of vulnerability falls under CWE-98 - Improper Control of Generation of Code and aligns with ATT&CK technique T1190 - Exploit Public-Facing Application, as it targets publicly accessible web interfaces of network devices. The flaw exists in the router's XML processing routines where user-controllable data is directly incorporated into PHP include statements without proper validation.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected router. Once exploited, adversaries can gain persistent access to the network infrastructure, potentially enabling them to modify firewall rules, redirect traffic, install backdoors, or use the device as a pivot point for further attacks within the network. The vulnerability affects not only the device's administrative functions but also its core networking capabilities, making it particularly dangerous for enterprise environments where network security is paramount. This weakness can lead to complete network compromise and violates fundamental security principles of network device isolation and protection.
Mitigation strategies for CVE-2013-4857 should include immediate firmware updates from D-Link to address the underlying PHP inclusion flaw, along with network segmentation to limit access to administrative interfaces. Organizations should implement network monitoring to detect anomalous traffic patterns that may indicate exploitation attempts, and establish secure remote access protocols that do not rely on vulnerable web interfaces. Additional protective measures include disabling unnecessary services, implementing strict access controls, and conducting regular security assessments of network infrastructure. The vulnerability demonstrates the importance of input validation and proper code sanitization practices in embedded systems, emphasizing the need for comprehensive security testing of network devices before deployment.