CVE-2005-0789 in LimeWire
Summary
by MITRE
Directory traversal vulnerability in LimeWire 3.9.6 through 4.6.0 allows remote attackers to read arbitrary files via a .. (dot dot) in a magnet request.
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Analysis
by VulDB Data Team • 06/05/2019
The directory traversal vulnerability identified as CVE-2005-0789 represents a critical security flaw in LimeWire versions 3.9.6 through 4.6.0 that enables remote attackers to access arbitrary files on the target system. This vulnerability specifically manifests within the magnet request processing functionality of the LimeWire peer-to-peer file sharing application, where the software fails to properly validate input parameters containing directory traversal sequences. The flaw allows malicious actors to exploit the absence of proper input sanitization mechanisms by injecting .. (dot dot) sequences into magnet requests, thereby bypassing normal file access controls and gaining unauthorized access to sensitive system files.
This vulnerability falls under the CWE-22 category of "Improper Limitation of a Pathname to a Restricted Directory" and aligns with the broader class of path traversal attacks that have been extensively documented in cybersecurity literature. The technical implementation of this flaw demonstrates a classic lack of input validation where the LimeWire application processes magnet URI requests without adequately sanitizing the path components that may contain directory traversal sequences. When a user or attacker submits a magnet request containing .. sequences, the application interprets these as legitimate navigation commands rather than malicious input, allowing access to files outside the intended directory structure.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access system files, configuration data, user credentials, and potentially sensitive application data. In the context of peer-to-peer networks, this vulnerability could enable attackers to extract user information, access local file systems, or even gain insights into the underlying operating system configuration. The attack vector is particularly concerning because it operates over the network without requiring authentication, making it a significant threat to users who have LimeWire running on their systems. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachment) as attackers could leverage this to discover system information and potentially escalate privileges through access to sensitive files.
Mitigation strategies for CVE-2005-0789 should focus on immediate patching of affected LimeWire versions, as the vulnerability was addressed in subsequent releases. System administrators should implement network-level filtering to block magnet URI processing or restrict access to LimeWire functionality where possible. Additionally, users should be educated about the risks of running outdated peer-to-peer software and the importance of keeping applications updated. The vulnerability highlights the critical importance of input validation and proper path handling in network applications, serving as a reminder that even seemingly benign features like file sharing can introduce significant security risks when proper validation mechanisms are not implemented. Organizations should also consider implementing network segmentation and monitoring to detect unusual file access patterns that might indicate exploitation attempts. The remediation process should include comprehensive testing of patched versions to ensure that the vulnerability has been properly addressed and that no regressions have been introduced in the application's core functionality.