CVE-2015-9250 in Skybox
Summary
by MITRE
An issue was discovered in Skybox Platform before 7.5.401. Directory Traversal exists in /skyboxview/webskybox/attachmentdownload and /skyboxview/webskybox/filedownload via the tempFileName parameter.
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Analysis
by VulDB Data Team • 12/22/2019
The vulnerability identified as CVE-2015-9250 represents a critical directory traversal flaw within the Skybox Platform version 7.5.401 and earlier. This security weakness exists in two primary endpoints: /skyboxview/webskybox/attachmentdownload and /skyboxview/webskybox/filedownload. The vulnerability stems from improper input validation of the tempFileName parameter, which allows attackers to manipulate file paths and access unauthorized system resources. The issue falls under the Common Weakness Enumeration category CWE-22, which specifically addresses Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal or directory traversal attacks. These attacks enable malicious actors to navigate through the file system hierarchy and access files that should normally be restricted, potentially leading to data exfiltration, system compromise, or further exploitation opportunities.
The operational impact of this vulnerability is significant as it provides attackers with the ability to bypass normal access controls and retrieve sensitive files from the server. An attacker could exploit this weakness by crafting malicious requests that include directory traversal sequences such as ../ or ..\ in the tempFileName parameter. This would allow them to access files outside the intended download directory, potentially including system configuration files, database credentials, application source code, or other confidential information. The vulnerability is particularly dangerous because it affects core file handling functionality within the platform, meaning that any user with access to the affected endpoints could potentially exploit this weakness. The attack vector is straightforward and requires minimal technical expertise, making it a high-risk vulnerability that could be leveraged by both skilled attackers and automated exploit tools.
Mitigation strategies for CVE-2015-9250 should focus on implementing proper input validation and sanitization mechanisms. Organizations should immediately upgrade to Skybox Platform version 7.5.401 or later, which contains the necessary patches to address this vulnerability. Additionally, implementing strict parameter validation on the tempFileName input, including whitelisting allowed file paths, removing special characters, and enforcing proper access controls for file operations would significantly reduce the risk. Network segmentation and monitoring of these specific endpoints can help detect potential exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques such as T1059 Command and Scripting Interpreter and T1566 Phishing, as attackers may use this weakness to gain initial access or escalate privileges. Security teams should also implement automated vulnerability scanning processes to identify similar weaknesses in other applications and ensure that all file handling operations are properly secured against path traversal attacks. Regular security assessments and penetration testing should be conducted to verify that the implemented mitigations are effective and that no similar vulnerabilities exist within the platform's architecture.