CVE-2005-0788 in LimeWire
Summary
by MITRE
LimeWire 4.1.2 through 4.5.6 allows remote attackers to read arbitrary files by specifying the full pathname in a Gnutella GET request.
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Analysis
by VulDB Data Team • 01/27/2025
The vulnerability identified as CVE-2005-0788 represents a critical directory traversal flaw in LimeWire versions 4.1.2 through 4.5.6 that enables remote attackers to access arbitrary files on the target system. This issue stems from inadequate input validation within the Gnutella protocol implementation, specifically in how the software processes GET requests that contain full pathnames. The flaw allows an attacker to bypass normal file access controls and retrieve sensitive data from the local filesystem, potentially exposing confidential information stored on the affected system.
The technical exploitation of this vulnerability occurs through the Gnutella protocol's GET request mechanism where LimeWire fails to properly sanitize or validate the file path information provided by remote peers. When a malicious user sends a specially crafted GET request containing an absolute pathname, the application processes this request without sufficient validation, allowing direct file system access. This vulnerability falls under the CWE-22 category of Improper Limitation of a Pathname to a Restricted Directory, commonly known as Path Traversal or Directory Traversal. The implementation flaw demonstrates poor input validation practices that directly violate security principles of least privilege and proper access control enforcement.
The operational impact of CVE-2005-0788 extends beyond simple unauthorized file access, as it can potentially expose sensitive system information including configuration files, user data, and system credentials that may be stored in accessible locations. Attackers could leverage this vulnerability to gain insights into the system's internal structure, identify other potential attack vectors, and potentially escalate their privileges by accessing system configuration files or user-specific data. The vulnerability affects a wide range of LimeWire versions, making it particularly concerning as it impacted a popular peer-to-peer file sharing application used by thousands of users in 2005. This type of vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachment) as it enables attackers to discover and retrieve valuable information from compromised systems.
Mitigation strategies for this vulnerability require immediate patching of affected LimeWire installations to version 4.6.0 or later, which contains the necessary input validation fixes. System administrators should also implement network-level restrictions to limit peer-to-peer traffic and consider deploying firewall rules that restrict access to LimeWire's Gnutella protocol ports. Additional protective measures include disabling unnecessary file sharing features, implementing proper access controls on sensitive files, and monitoring network traffic for suspicious Gnutella protocol activity. The vulnerability highlights the importance of proper input validation and access control implementation in networked applications, particularly those handling user-provided data through protocol mechanisms. Organizations should also conduct regular security assessments of their peer-to-peer software installations and ensure proper patch management procedures are in place to address similar vulnerabilities in other applications.