CVE-2018-5165 in Firefox
Summary
by MITRE
In 32-bit versions of Firefox, the Adobe Flash plugin setting for "Enable Adobe Flash protected mode" is unchecked by default even though the Adobe Flash sandbox is actually enabled. The displayed state is the reverse of the true setting, resulting in user confusion. This could cause users to select this setting intending to activate it and inadvertently turn protections off. This vulnerability affects Firefox < 60.
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Analysis
by VulDB Data Team • 07/20/2024
This vulnerability in Firefox versions prior to 60 represents a critical user interface deception issue that undermines security configuration expectations. The flaw exists specifically in 32-bit versions of the browser where the Adobe Flash plugin settings exhibit a misleading display state for the protected mode toggle. When users attempt to enable Adobe Flash protected mode through the browser interface, they are presented with a false positive confirmation that the setting has been activated. However, the actual system behavior contradicts this visual indication, leaving the protection mechanism disabled despite the user's apparent intention to activate it.
The technical nature of this vulnerability stems from a discrepancy between the graphical user interface representation and the underlying system configuration. This type of issue falls under the CWE-1004 category of "Security Weaknesses Related to User Interface Design" where interface elements fail to accurately reflect system state. The root cause involves improper synchronization between the user-facing controls and the actual security parameters that govern Adobe Flash plugin behavior within the browser environment. This misalignment creates a false sense of security for users who believe they have enabled critical protection mechanisms.
The operational impact of this vulnerability extends beyond simple user confusion to potentially create security exposure scenarios. Users who rely on the Flash plugin's protected mode as a security control may inadvertently disable it without realizing the consequences, leaving their systems more vulnerable to exploitation. The vulnerability specifically affects Firefox versions less than 60, meaning users running older browser versions face this deception. This issue represents a classic case where user interface design fails to align with security implementation, creating a situation where user actions produce unintended security outcomes rather than the expected protective measures.
From an adversarial perspective, this vulnerability could be exploited by threat actors who understand the discrepancy between interface display and actual system behavior. Attackers might craft social engineering campaigns specifically targeting users who believe they have enabled Flash protection, only to discover that their systems remain vulnerable. The ATT&CK framework classification for this vulnerability would fall under T1059.007 for "Command and Scripting Interpreter: JavaScript' and potentially T1566 for 'Phishing' if used in targeted campaigns. Organizations should consider this vulnerability as part of their broader security awareness training, emphasizing the importance of verifying security settings rather than relying solely on visual confirmation. The remediation strategy requires immediate browser version updates to Firefox 60 or later, which resolves the interface synchronization issue and ensures that user selections accurately reflect actual security configurations. Additionally, system administrators should implement monitoring to detect potential exploitation attempts targeting this specific security deception pattern.