CVE-2017-14193 in FineCMS
Summary
by MITRE
The oauth function in controllers/member/api.php in dayrui FineCms 5.0.11 has XSS related to the Referer HTTP header with Internet Explorer.
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Analysis
by VulDB Data Team • 11/13/2019
The vulnerability identified as CVE-2017-14193 affects dayrui FineCms version 5.0.11 and resides within the oauth function located in controllers/member/api.php. This security flaw represents a cross-site scripting vulnerability that specifically targets Internet Explorer browsers through manipulation of the Referer HTTP header. The issue demonstrates how web applications can inadvertently create security holes when processing HTTP headers without proper sanitization or validation mechanisms.
The technical implementation of this vulnerability stems from insufficient input validation within the oauth function's handling of the Referer header. When Internet Explorer processes certain malformed or crafted Referer values, the application fails to properly sanitize the input before rendering it in the browser context. This creates an environment where malicious actors can inject arbitrary JavaScript code through the Referer header, which then executes in the context of the victim's browser session. The vulnerability specifically impacts Internet Explorer due to its unique handling of certain HTTP header values and how it processes rendered content that contains unescaped user input.
From an operational perspective, this vulnerability poses significant risks to users of the FineCms platform, particularly those utilizing Internet Explorer browsers. Attackers could exploit this weakness to perform session hijacking, steal user credentials, or execute malicious code on behalf of authenticated users. The impact extends beyond simple data theft as the vulnerability allows for potential privilege escalation and unauthorized access to protected administrative functions. The fact that this affects the member API controller suggests that successful exploitation could compromise user accounts and potentially lead to broader system compromise through authenticated attack vectors.
The vulnerability aligns with CWE-79 Cross-site Scripting and follows patterns consistent with ATT&CK technique T1059.007 Command and Scripting Interpreter: JavaScript. Organizations using FineCms 5.0.11 should implement immediate mitigations including input validation for all HTTP headers, proper output encoding of user-supplied data, and browser-specific security controls. The recommended remediation involves sanitizing the Referer header before any processing occurs and implementing Content Security Policy headers to prevent unauthorized script execution. Additionally, users should be encouraged to migrate away from Internet Explorer to more secure modern browsers that handle input validation more robustly. The vulnerability highlights the importance of comprehensive input validation across all HTTP headers and demonstrates how legacy browser compatibility considerations can introduce security risks when not properly addressed through defensive programming practices.