CVE-2005-3030 in V3Net
Summary
by MITRE
Directory traversal vulnerability in the archive decompression library in AhnLab V3Pro 2004 build 6.0.0.383, V3 VirusBlock 2005 build 6.0.0.383, and V3Net for Windows Server 6.0 build 6.0.0.383 allows remote attackers to write arbitrary files via a .. (dot dot) in the filename in a compressed archive.
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Analysis
by VulDB Data Team • 07/12/2018
The vulnerability identified as CVE-2005-3030 represents a critical directory traversal flaw within the archive decompression functionality of several AhnLab security products including V3Pro 2004, V3 VirusBlock 2005, and V3Net for Windows Server. This weakness specifically affects the decompression library component that processes compressed files, creating a pathway for malicious actors to manipulate file extraction behavior. The vulnerability manifests when the system encounters filename entries containing .. (dot dot) sequences within compressed archives, which are standard indicators of directory traversal in Unix-like systems. The flaw stems from inadequate input validation and path resolution mechanisms within the decompression engine, allowing attackers to specify arbitrary file paths during archive extraction operations. This directory traversal capability enables attackers to write files to locations outside the intended extraction directory, potentially compromising system integrity and security boundaries. The vulnerability is particularly concerning because it affects multiple security products from the same vendor, suggesting a fundamental flaw in the core decompression library that may have broader implications for the entire product suite. According to CWE classification, this vulnerability maps to CWE-22, which specifically addresses Improper Limitation of a Pathname to a Restricted Directory, commonly known as Path Traversal. The weakness creates a direct pathway for attackers to bypass normal file system access controls and potentially overwrite critical system files or inject malicious content into unexpected locations. From an operational perspective, this vulnerability exposes the affected systems to significant risk of arbitrary file creation and modification, potentially allowing attackers to establish persistent backdoors, overwrite legitimate executables, or corrupt system files. The remote exploitability of this vulnerability means that attackers do not require local access to the system, making it particularly dangerous in networked environments where compressed files might be processed automatically. The attack vector typically involves crafting malicious compressed archives containing filenames with .. sequences that, when decompressed, cause the system to write files to unintended locations, potentially including system directories or other critical paths. This vulnerability directly aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1078 for Valid Accounts, as it enables attackers to establish persistence and potentially escalate privileges by writing malicious files to system locations. The impact extends beyond simple file manipulation to include potential privilege escalation opportunities, as attackers can target system directories where elevated permissions are required for file creation. Organizations using these specific AhnLab products should immediately implement mitigations including updating to patched versions, implementing strict file path validation, and monitoring for unusual file creation patterns in system directories. The vulnerability also highlights the importance of secure coding practices in security software, as even protective tools can contain flaws that undermine their effectiveness. The exploitation of this vulnerability demonstrates how security products themselves can become attack vectors when not properly secured against common input validation flaws. This particular weakness underscores the necessity for comprehensive security testing of all components within security suites, as a flaw in one component can compromise the entire protective ecosystem. The vulnerability's classification as remote and exploitable through compressed archives indicates that it could be leveraged in automated attacks against systems that process untrusted compressed content, making it particularly dangerous in enterprise environments where such processing occurs routinely.