CVE-2017-8863 in 3960
Summary
by MITRE
Information disclosure of .esp source code on the Cohu 3960 allows an attacker to view sensitive information such as application logic with a simple web browser.
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Analysis
by VulDB Data Team • 12/09/2019
The vulnerability identified as CVE-2017-8863 represents a critical information disclosure flaw within the Cohu 3960 surveillance system, specifically affecting the .esp file extension which typically contains embedded source code. This issue stems from improper access controls and directory traversal vulnerabilities that allow unauthorized users to directly access and retrieve sensitive application source code through standard web browser interfaces. The flaw exists due to inadequate input validation and insufficient authorization mechanisms within the web application serving the Cohu 3960 device management interface.
The technical implementation of this vulnerability involves the exploitation of weak web server configurations that fail to properly restrict access to sensitive file types including .esp files which contain embedded scripting code and application logic. Attackers can simply construct specific URL paths to directly access these files without authentication, thereby obtaining complete source code implementations that reveal application architecture, business logic, and potentially sensitive implementation details. This type of vulnerability maps directly to CWE-200, which defines information exposure, and specifically aligns with CWE-542 which addresses information exposure through file access. The attack pattern follows the methodology outlined in the MITRE ATT&CK framework under T1083 - File and Directory Discovery, where adversaries systematically enumerate and access sensitive files.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposed .esp source code provides attackers with comprehensive insights into the application's internal workings, including potential implementation flaws, hardcoded credentials, database connection strings, and architectural patterns that could be leveraged for further exploitation. This exposure creates significant risk for organizations using Cohu 3960 systems, as the disclosed source code may contain sensitive business logic, communication protocols, and security implementation details that could be used to craft more sophisticated attacks against the system or its network environment. The vulnerability particularly affects organizations in security-critical sectors where surveillance equipment serves as part of broader security infrastructure, making the exposure of application logic especially concerning from both operational and security perspectives.
Mitigation strategies for CVE-2017-8863 should focus on implementing proper access controls and restricting direct file access through web interfaces. Organizations must ensure that web servers are configured to prevent access to source code files and that appropriate authentication and authorization mechanisms are enforced for all application resources. Security measures should include implementing proper input validation, restricting directory traversal capabilities, and ensuring that sensitive files are not directly accessible through standard web protocols. Additionally, regular security assessments and source code reviews should be conducted to identify and remediate similar vulnerabilities across all web applications and embedded systems within the organization's infrastructure. The remediation approach should align with industry best practices for secure web application development and follow the principles outlined in the OWASP Top Ten and NIST Cybersecurity Framework to ensure comprehensive protection against information disclosure threats.