CVE-2017-2367 in tvOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.3 is affected. Safari before 10.1 is affected. tvOS before 10.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted web site.
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability identified as CVE-2017-2367 represents a critical security flaw within Apple's WebKit rendering engine that affected multiple Apple operating systems including iOS versions prior to 10.3, Safari versions before 10.1, and tvOS versions before 10.2. This vulnerability resides within the core web browsing component that powers Apple's internet capabilities across its ecosystem. The flaw specifically targets the Same Origin Policy implementation which serves as a fundamental security mechanism in web browsers designed to prevent unauthorized access to resources between different origins. The Same Origin Policy is a critical security control that enforces restrictions on how documents or scripts loaded from one origin can interact with resources from another origin, making it a cornerstone of web application security.
The technical nature of this vulnerability allows remote attackers to exploit a weakness in WebKit's cross-origin resource sharing controls, enabling them to bypass the security boundaries that normally protect users from malicious websites. Attackers can craft specially designed web pages that leverage this flaw to access sensitive information that should normally be restricted to the same origin. This bypass capability represents a significant escalation in threat potential as it undermines the fundamental isolation mechanisms that web browsers implement to protect user data. The vulnerability falls under the CWE-284 access control weakness category, specifically related to improper access control mechanisms within web browsers. The attack vector involves malicious web content that can be delivered through various channels including phishing websites, compromised web servers, or malicious advertisements that users might inadvertently visit.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates opportunities for more sophisticated attacks that can lead to data breaches, session hijacking, and privacy violations. When attackers successfully bypass the Same Origin Policy, they gain unauthorized access to potentially sensitive user data that could include personal information, session cookies, or other confidential data that should remain isolated between different web origins. This vulnerability particularly affects users of Apple's ecosystem who rely on Safari and WebKit-powered applications, making it a widespread concern across millions of devices. The security implications are significant because this flaw can be exploited without any user interaction beyond visiting a malicious website, making it particularly dangerous in real-world scenarios.
Organizations and users should implement immediate mitigations including updating to the affected Apple operating systems and browsers as soon as possible to patch this vulnerability. The recommended approach involves applying the latest security updates from Apple that address the WebKit implementation issues and restore proper Same Origin Policy enforcement. Network administrators should also consider implementing additional security controls such as web application firewalls, content filtering solutions, and user education initiatives to reduce exposure while waiting for official patches. The vulnerability demonstrates the critical importance of maintaining up-to-date software and the potential consequences of running outdated operating systems that may contain unpatched security flaws. This particular vulnerability aligns with ATT&CK technique T1059.001 for command and control communications and T1566 for credential access through social engineering, as attackers can leverage this flaw to establish persistent access to user data and potentially escalate privileges within affected systems.