CVE-2004-1286 in NapShare
Summary
by MITRE
Buffer overflow in the auto_filter_extern function in auto.c for NapShare 1.2, with the extern filter enabled, allows remote attackers to execute arbitrary code via a crafted gnutella response.
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Analysis
by VulDB Data Team • 12/27/2024
The vulnerability identified as CVE-2004-1286 represents a critical buffer overflow flaw within the NapShare 1.2 file sharing application, specifically within the auto_filter_extern function located in the auto.c source file. This issue arises when the application processes external filters, creating a scenario where maliciously crafted Gnutella responses can trigger memory corruption. The vulnerability demonstrates the classic characteristics of a stack-based buffer overflow, where insufficient input validation allows attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution. The flaw is particularly dangerous because it operates over a network protocol, enabling remote exploitation without requiring local system access or user interaction.
The technical implementation of this vulnerability stems from inadequate bounds checking within the auto_filter_extern function, which processes external filter configurations received through Gnutella network communications. When the application encounters a crafted response containing oversized data within specific fields, the buffer allocated for processing this data becomes overflowed, potentially overwriting the return address on the stack or adjacent variables. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would allow attackers to execute arbitrary commands on the affected system. The vulnerability's remote exploitability means that attackers can leverage the Gnutella protocol to deliver malicious payloads without requiring physical access to the target system.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally compromises the integrity and availability of systems running NapShare 1.2. Attackers exploiting this flaw could gain complete control over affected systems, potentially using them as launching points for further attacks within network environments. The vulnerability's nature makes it particularly attractive to threat actors because it can be triggered automatically when the application processes incoming Gnutella responses, requiring no user interaction or specific conditions beyond normal application operation. This makes the exploit highly effective for automated attacks and increases the risk of widespread compromise across networks where NapShare is deployed. The vulnerability also demonstrates poor software security practices, particularly in input validation and memory management, which are fundamental requirements for secure application development.
Mitigation strategies for CVE-2004-1286 should focus on immediate remediation through software updates and patches provided by the vendor, as well as network-level protections to prevent unauthorized Gnutella traffic. Organizations should implement network segmentation to isolate systems running NapShare from critical infrastructure, while also deploying intrusion detection systems capable of identifying suspicious Gnutella traffic patterns. The vulnerability highlights the importance of secure coding practices including bounds checking, input validation, and memory management techniques that are essential for preventing buffer overflow conditions. From a defensive perspective, this vulnerability aligns with ATT&CK tactic T1590 for reconnaissance and T1046 for network service scanning, as attackers may attempt to identify vulnerable systems before exploitation. System administrators should also consider implementing application whitelisting policies to restrict the execution of untrusted file sharing applications, and conduct regular security assessments to identify similar vulnerabilities in legacy software systems. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software and implementing comprehensive security measures to protect against known exploits that can be leveraged for unauthorized system access and control.