CVE-2013-4654 in TL-WDR4300
Summary
by MITRE
Symlink Traversal vulnerability in TP-LINK TL-WDR4300 and TL-1043ND..
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Analysis
by VulDB Data Team • 02/13/2024
The CVE-2013-4654 vulnerability represents a critical symlink traversal issue affecting TP-LINK wireless routers including the TL-WDR4300 and TL-1043ND models. This vulnerability stems from improper handling of symbolic links within the router's firmware, creating a pathway for unauthorized access to sensitive system files and directories. The flaw allows attackers to manipulate file paths through crafted symlink references, potentially enabling them to bypass access controls and gain elevated privileges on the affected devices. Such vulnerabilities are particularly dangerous in network infrastructure devices where unauthorized access can compromise entire network segments and provide attackers with persistent footholds for further exploitation. The vulnerability falls under the broader category of path traversal attacks that have been consistently identified in cybersecurity frameworks and represent a fundamental weakness in input validation and file system access controls.
The technical implementation of this vulnerability involves the manipulation of symbolic links within the router's web administration interface or firmware update mechanisms. Attackers can exploit this weakness by creating or modifying symbolic links that point to sensitive system files such as configuration files, password databases, or system binaries. When the router processes these symbolic links without proper validation, it can inadvertently traverse to restricted directories and execute unauthorized operations. This type of vulnerability typically relates to CWE-35, which describes path traversal or directory traversal issues, and aligns with ATT&CK technique T1059 for command and scripting interpreter usage. The flaw essentially allows an attacker to circumvent normal file system access controls and potentially access files that should remain protected, such as the router's configuration files that may contain administrative credentials or network settings.
The operational impact of CVE-2013-4654 extends beyond simple unauthorized file access, as it can enable attackers to modify critical system components and potentially take complete control of the affected routers. Once exploited, attackers can manipulate the router's configuration, redirect traffic, or establish persistent backdoors that allow continued access even after the initial compromise. This vulnerability particularly affects enterprise and home network environments where these routers serve as primary network gateways, making them attractive targets for attackers seeking to establish network-wide persistence. The implications include potential data exfiltration, man-in-the-middle attacks, and the ability to disrupt network services. Network administrators who fail to patch this vulnerability may find their networks compromised through lateral movement once attackers have established initial access through this specific weakness.
Mitigation strategies for CVE-2013-4654 require immediate firmware updates from TP-LINK to address the symbolic link handling flaws. Organizations should implement network segmentation to limit the impact of compromised devices and deploy intrusion detection systems that can identify suspicious file system access patterns. Regular security audits of network infrastructure devices should include verification of firmware versions and patch status to prevent exploitation of known vulnerabilities. Additionally, implementing strict access controls for router administration interfaces and disabling unnecessary services can reduce the attack surface. The vulnerability highlights the importance of proper input validation and secure file system operations in embedded systems, aligning with industry best practices such as those outlined in the OWASP Top 10 and NIST cybersecurity frameworks. Network security teams should also consider implementing device authentication and monitoring mechanisms to detect unauthorized configuration changes that may indicate exploitation attempts.