CVE-2017-7056 in iTunes
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.3.3 is affected. Safari before 10.1.2 is affected. iCloud before 6.2.2 on Windows is affected. iTunes before 12.6.2 on Windows is affected. tvOS before 10.2.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.
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Analysis
by VulDB Data Team • 06/02/2025
The vulnerability identified as CVE-2017-7056 represents a critical memory corruption flaw within Apple's WebKit rendering engine that affects multiple operating systems and applications. This issue specifically targets the WebKit component which serves as the foundation for Safari web browser functionality across Apple's ecosystem including iOS, macOS, tvOS, and Windows versions of iCloud and iTunes. The vulnerability stems from improper memory management during web page rendering processes, creating opportunities for malicious actors to exploit memory corruption weaknesses that can lead to arbitrary code execution or application crashes.
The technical nature of this vulnerability falls under CWE-125, which describes out-of-bounds read conditions where an application attempts to access memory beyond its allocated boundaries. Attackers can craft malicious web pages that trigger specific memory corruption patterns within WebKit's JavaScript engine and rendering pipeline. When users visit these compromised websites, the malicious code exploits buffer overflow conditions or use-after-free vulnerabilities in WebKit's memory handling mechanisms, potentially allowing remote code execution with the privileges of the affected application. The flaw demonstrates how improper memory management in browser components can create persistent security risks across multiple platforms.
The operational impact of CVE-2017-7056 extends beyond simple denial of service scenarios to encompass full system compromise potential. Attackers can leverage this vulnerability to execute arbitrary code on targeted systems without user interaction, as the exploitation occurs during normal web browsing activities. This makes the vulnerability particularly dangerous in enterprise environments where users regularly access external websites. The affected applications including Safari, iTunes, iCloud, and tvOS create multiple attack vectors since these components are frequently used and often run with elevated privileges. The vulnerability's presence in iOS before 10.3.3, Safari before 10.1.2, and related Windows applications demonstrates how memory corruption issues can propagate across different software ecosystems within the same vendor's product line.
Mitigation strategies for CVE-2017-7056 primarily focus on immediate patch deployment and application of security updates provided by Apple. Organizations should prioritize updating all affected systems to the latest available versions including iOS 10.3.3, Safari 10.1.2, iCloud 6.2.2, iTunes 12.6.2, and tvOS 10.2.2. Network administrators should implement web filtering solutions to block access to known malicious domains and consider deploying sandboxing technologies to limit the impact of potential exploitation. The vulnerability's classification under ATT&CK technique T1203, which covers exploitation for client execution, highlights the importance of monitoring for suspicious browser activity and implementing behavioral analysis tools to detect anomalous memory access patterns. Additionally, security teams should conduct regular vulnerability assessments to identify similar memory corruption issues within other browser components and maintain updated threat intelligence feeds to track related exploitation attempts.
This vulnerability exemplifies the ongoing challenge of memory safety in modern web browsers where complex rendering engines must balance performance with security. The exploitation techniques employed in CVE-2017-7056 demonstrate how attackers can leverage seemingly minor memory management flaws to achieve significant system compromise, emphasizing the critical importance of robust memory safety practices in browser development. Organizations should also consider implementing additional security controls such as application whitelisting, mandatory patch management policies, and regular security awareness training to protect against similar vulnerabilities that may emerge in the future.