CVE-2018-6496 in UCMBD
Summary
by MITRE
Remote Cross-site Request forgery (CSRF) potential has been identified in UCMBD Browser version 4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.15.1 which could allow for remote unsafe deserialization and cross-site request forgery (CSRF).
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Analysis
by VulDB Data Team • 03/27/2023
The vulnerability identified in CVE-2018-6496 represents a critical security flaw affecting UCMBD Browser versions 4.10 through 4.15.1, where the implementation suffers from insufficient protection against cross-site request forgery attacks. This vulnerability stems from the browser's inadequate validation mechanisms that fail to properly verify the origin and authenticity of requests, creating an exploitable condition that could be leveraged by remote attackers to execute unauthorized actions on behalf of authenticated users. The flaw exists within the browser's request handling architecture, specifically in how it processes and validates cross-site requests without proper anti-CSRF token implementation or origin verification mechanisms.
The technical implementation of this vulnerability allows attackers to craft malicious requests that appear to originate from legitimate users within the browser's security context. This occurs because the browser fails to enforce proper CSRF protection measures such as anti-CSRF tokens, referer header validation, or origin checking mechanisms that would normally prevent unauthorized cross-site requests from being processed successfully. The vulnerability enables attackers to potentially manipulate browser behavior through carefully constructed requests that bypass the normal security boundaries established by the browser's session management and request validation systems. This weakness creates a pathway for attackers to perform actions such as modifying user settings, accessing restricted resources, or executing unauthorized transactions within the browser's operational context.
The operational impact of this vulnerability extends beyond simple CSRF exploitation to include potential unsafe deserialization scenarios that could allow for remote code execution or privilege escalation. Attackers could leverage the CSRF vulnerability to inject malicious payloads that exploit unsafe deserialization practices within the browser's processing pipeline, potentially leading to complete system compromise. The vulnerability affects all versions within the specified release range, indicating a widespread issue that would impact numerous users and organizations relying on these browser versions for their operational security. The remote nature of the exploit means that attackers do not require physical access to target systems, making the vulnerability particularly dangerous in environments where network exposure is common.
Mitigation strategies for CVE-2018-6496 should prioritize immediate browser version updates to patched releases that implement proper CSRF protection mechanisms. Organizations should implement additional network-level controls such as web application firewalls that can detect and block suspicious cross-site request patterns, along with implementing proper CSRF token validation at the application level. Security teams should also consider implementing origin validation checks and referer header enforcement to prevent unauthorized cross-site requests from being processed. The vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications, and represents a clear violation of the principle of least privilege and proper access control enforcement. Organizations should also conduct thorough security assessments to identify any other systems or applications that might be vulnerable to similar CSRF or deserialization attacks, particularly those that process untrusted input without proper sanitization or validation measures.