CVE-2008-1885 in Download Client
Summary
by MITRE
Directory traversal vulnerability in the NeffyLauncher 1.0.5 ActiveX control (NeffyLauncher.dll) in CDNetworks Nefficient Download allows remote attackers to download arbitrary code onto a client system via a .. (dot dot) in the SkinPath parameter and a .zip URL in the HttpSkin parameter. NOTE: this can be leveraged for code execution by writing to a Startup folder.
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Analysis
by VulDB Data Team • 10/20/2024
The CVE-2008-1885 vulnerability represents a critical directory traversal flaw within the NeffyLauncher 1.0.5 ActiveX control distributed by CDNetworks Nefficient Download. This vulnerability exists in the NeffyLauncher.dll component and specifically targets the SkinPath parameter processing mechanism. The flaw allows remote attackers to manipulate file paths through the use of directory traversal sequences, particularly the .. (dot dot) notation, combined with malicious .zip URL references in the HttpSkin parameter. The vulnerability stems from inadequate input validation and sanitization within the ActiveX control's parameter handling routines, creating an exploitable condition where user-supplied input directly influences file system operations without proper boundary checks.
The technical exploitation of this vulnerability leverages the inherent trust model of ActiveX controls within Windows environments, where the control executes with the privileges of the user running the application. When a maliciously crafted SkinPath parameter containing directory traversal sequences is processed, the control attempts to download and extract content from the specified HttpSkin URL, potentially allowing attackers to place executable files in critical system locations. The vulnerability's impact is significantly amplified because it can be used to write files to Windows Startup folders, enabling persistent execution of malicious code on system boot. This represents a direct violation of the principle of least privilege and creates a persistent backdoor mechanism within the compromised system.
The operational impact of this vulnerability extends beyond simple code execution to encompass full system compromise and persistent access. Attackers can leverage this flaw to establish a foothold on target systems by placing malicious executables in the Startup folder, ensuring that their payloads execute automatically upon system reboot. This persistence mechanism aligns with the ATT&CK framework's concept of "Registry Run Keys / Startup Folder" techniques, where adversaries establish persistence by modifying system configuration to ensure malicious code executes at system startup. The vulnerability also demonstrates characteristics consistent with CWE-22 Directory Traversal, which describes the condition where untrusted input is used to construct file paths without proper validation, allowing access to files outside the intended directory.
Mitigation strategies for CVE-2008-1885 must address both the immediate vulnerability and broader security posture. The primary recommendation involves immediate removal or disabling of the vulnerable NeffyLauncher ActiveX control from affected systems, as the control is no longer supported by the vendor. Organizations should implement ActiveX control restrictions through group policies and browser security settings to prevent execution of untrusted ActiveX components. Network-level mitigations include implementing web application firewalls that can detect and block directory traversal patterns in URL parameters, particularly those involving .. sequences. Additionally, security teams should conduct comprehensive vulnerability assessments to identify other ActiveX controls or legacy components that may exhibit similar path traversal vulnerabilities. The incident highlights the importance of maintaining up-to-date security controls and demonstrates how legacy ActiveX components can create persistent security risks in enterprise environments.