CVE-2006-4490 in Share 360
Summary
by MITRE
Multiple directory traversal vulnerabilities in Cybozu Office before 6.6 Build 1.3 and Share 360 before 2.5 Build 0.3 allow remote authenticated users to read arbitrary files via a .. (dot dot) sequence via the id parameter in (1) scripts/cbag/ag.exe or (2) scripts/s360v2/s360.exe.
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Analysis
by VulDB Data Team • 12/20/2024
The vulnerability CVE-2006-4490 represents a critical directory traversal flaw affecting Cybozu Office and Share 360 products prior to specific build versions. This security weakness stems from inadequate input validation mechanisms within the application's file handling processes, specifically in two key executable scripts. The vulnerability operates by allowing authenticated remote attackers to manipulate file access through manipulation of the id parameter, exploiting the system's failure to properly sanitize user-supplied input before processing file requests. The affected components include scripts/cbag/ag.exe and scripts/s360v2/s360.exe which serve as critical entry points for the exploitation vector.
The technical implementation of this vulnerability aligns with CWE-22, which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. Attackers can leverage this flaw by constructing malicious requests containing .. (dot dot) sequences within the id parameter, effectively allowing them to navigate outside the intended directory structure and access arbitrary files on the server. The authentication requirement for exploitation means that only users with valid credentials can exploit this vulnerability, though this limitation does not mitigate the severity of potential data exposure. The vulnerability specifically targets the file resolution mechanisms within the Cybozu applications, bypassing normal access controls and allowing unauthorized file retrieval from the server's file system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access sensitive configuration files, user data, application source code, and potentially system files that could reveal critical infrastructure details. This exposure could lead to further exploitation opportunities including privilege escalation, system compromise, or data theft. The remote nature of the attack means that adversaries can exploit this vulnerability from outside the network perimeter, making it particularly dangerous for organizations that do not properly segment their network environments. Additionally, the authenticated requirement does not prevent attackers who have already compromised legitimate user accounts from leveraging this vulnerability for more extensive reconnaissance and data exfiltration activities.
Organizations should implement immediate mitigations including updating to the patched versions of Cybozu Office 6.6 Build 1.3 and Share 360 2.5 Build 0.3, which contain proper input validation and sanitization mechanisms. Network segmentation and access control measures should be enforced to limit the potential impact of credential compromise. The vulnerability demonstrates the importance of implementing secure coding practices and input validation as outlined in the OWASP Top Ten and MITRE ATT&CK framework categories related to command injection and privilege escalation techniques. Regular security assessments and penetration testing should be conducted to identify similar path traversal vulnerabilities in other applications and systems, as this type of flaw remains prevalent in legacy applications and can serve as a gateway for more sophisticated attacks.