CVE-2006-6865 in FileUp
Summary
by MITRE
Directory traversal vulnerability in SAFileUpSamples/util/viewsrc.asp in SoftArtisans FileUp (SAFileUp) 5.0.14 allows remote attackers to read arbitrary files via a %c0%ae. (Unicode dot dot) in the path parameter, which bypasses the checks for ".." sequences.
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Analysis
by VulDB Data Team • 08/15/2024
The vulnerability CVE-2006-6865 represents a directory traversal flaw in SoftArtisans FileUp version 5.0.14 that specifically affects the SAFileUpSamples/util/viewsrc.asp component. This directory traversal vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied path parameters. The flaw exploits a Unicode encoding bypass technique where attackers can utilize the sequence %c0%ae to represent the Unicode character for a dot dot sequence, effectively circumventing standard security checks designed to prevent directory traversal attacks.
The technical implementation of this vulnerability occurs within the viewsrc.asp script which processes file path parameters without sufficient sanitization of Unicode sequences. When the application receives a path parameter containing the Unicode dot dot representation, it fails to normalize the input properly before performing file access operations. This allows an attacker to manipulate the file system access paths to navigate to arbitrary directories and potentially access sensitive files that should remain protected. The vulnerability specifically targets the file viewing functionality, which typically would be restricted to legitimate users within the application's intended scope.
From an operational impact perspective, this vulnerability poses significant risks to organizations using SoftArtisans FileUp 5.0.14, as it enables remote attackers to potentially access sensitive system files, configuration data, source code, and other confidential information. The bypass mechanism using Unicode encoding demonstrates the sophistication of modern attack vectors that can evade traditional security controls. Attackers can leverage this vulnerability to perform reconnaissance activities, extract valuable data, and potentially establish further footholds within the target environment. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the system.
Security controls should address this vulnerability through comprehensive input validation and sanitization mechanisms that normalize all Unicode sequences before processing file paths. The mitigation approach should include implementing strict path validation that rejects any input containing directory traversal sequences regardless of encoding method used. Organizations should also consider implementing proper access controls and privilege separation to limit the damage that could result from successful exploitation. This vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, and relates to ATT&CK technique T1083, which covers directory traversal attacks. Regular security updates and patch management processes are essential to address such vulnerabilities that could be exploited by threat actors to gain unauthorized access to sensitive information.