CVE-2017-9511 in FishEye
Summary
by MITRE
The MultiPathResource class in Atlassian FishEye and Crucible, before version 4.4.1 allows anonymous remote attackers to read read arbitrary files via a path traversal vulnerability when FishEye or Crucible are running on the Microsoft Windows operating system.
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Analysis
by VulDB Data Team • 10/15/2024
The vulnerability identified as CVE-2017-9511 represents a critical path traversal flaw within Atlassian FishEye and Crucible applications, specifically affecting versions prior to 4.4.1. This security weakness resides in the MultiPathResource class implementation and manifests exclusively on Microsoft Windows operating systems, creating a significant attack surface for unauthorized information disclosure. The flaw enables anonymous remote attackers to bypass authentication mechanisms and access arbitrary files on the target system through carefully crafted malicious requests that exploit directory traversal patterns.
The technical exploitation of this vulnerability leverages the Windows-specific file system handling within FishEye and Crucible's resource management components. Attackers can construct malicious paths that traverse beyond the intended application boundaries to access sensitive files including configuration files, database credentials, source code repositories, and other confidential data stored on the server. This path traversal occurs because the MultiPathResource class fails to properly sanitize user-supplied input parameters that are used to construct file paths, allowing attackers to manipulate directory navigation sequences such as ..\ or ..\..\. The vulnerability specifically targets Windows systems due to differences in path handling between Windows and Unix-like operating systems, where the Windows file system's case-insensitive nature and backslash delimiter create unique exploitation opportunities.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable further attack vectors including privilege escalation and system compromise. An attacker who successfully exploits this vulnerability can gain access to sensitive corporate data, source code repositories, and configuration files that may contain authentication credentials, API keys, or other security-sensitive information. The anonymous nature of the attack means that no prior authentication is required, making this vulnerability particularly dangerous as it can be exploited by anyone with network access to the affected system. This weakness directly violates the principle of least privilege and can lead to complete system compromise if sensitive files containing database connections, user credentials, or application secrets are accessible through the traversal mechanism.
Organizations utilizing Atlassian FishEye and Crucible products on Windows platforms should immediately implement mitigation strategies including applying the vendor-provided patch version 4.4.1 or later, which addresses the path traversal vulnerability through proper input validation and sanitization of user-supplied paths. Network segmentation and firewall rules should be implemented to restrict access to FishEye and Crucible services to authorized personnel only, while monitoring systems should be configured to detect and alert on suspicious path traversal attempts. The vulnerability aligns with CWE-22 Path Traversal and falls under ATT&CK technique T1083 File and Directory Discovery, representing a common attack pattern that leverages improper input validation to access unauthorized system resources. Regular security assessments and penetration testing should be conducted to verify the effectiveness of implemented controls and to identify any additional vulnerabilities in the application's file handling mechanisms.