CVE-2017-7095 in tvOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 11 is affected. Safari before 11 is affected. iCloud before 7.0 on Windows is affected. iTunes before 12.7 on Windows is affected. tvOS before 11 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 • 01/20/2021
The vulnerability identified as CVE-2017-7095 represents a critical memory corruption flaw within Apple's WebKit rendering engine that affected multiple Apple platforms and software components. This vulnerability specifically targets the WebKit component which serves as the core web browser engine powering Safari, iOS web views, and various other Apple applications. The flaw exists in the way WebKit processes certain web content, creating opportunities for remote code execution and system instability. The affected versions span across iOS before 11.0, Safari before 11.0, iCloud before version 7.0 on Windows, iTunes before version 12.7 on Windows, and tvOS before 11.0, indicating a widespread impact across Apple's ecosystem. The vulnerability's exploitation potential is significant as it allows attackers to craft malicious websites that can trigger memory corruption conditions leading to arbitrary code execution or denial of service scenarios. This type of vulnerability falls under the CWE-119 weakness category, which encompasses improper access to memory locations, and aligns with ATT&CK technique T1203 for legitimate user execution and T1059 for command and scripting interpreter. The memory corruption aspect of this vulnerability specifically relates to buffer overflows or use-after-free conditions that can be exploited to gain control over the affected system's execution flow. The impact extends beyond simple application crashes to potentially enable full system compromise, as the WebKit engine is deeply integrated into Apple's operating systems and applications. Attackers could leverage this vulnerability through web-based delivery mechanisms, making it particularly dangerous as users could be compromised simply by visiting malicious websites. The vulnerability's presence in both mobile and desktop environments demonstrates Apple's widespread dependency on WebKit and the corresponding risk exposure across their product portfolio. Organizations using affected Apple products face significant security risks as this vulnerability could be exploited in phishing campaigns, drive-by downloads, or other web-based attack vectors. The remediation process required updating to patched versions of the affected software components, which often necessitated coordinated updates across multiple platforms and applications. Security professionals should consider this vulnerability as part of broader web application security assessments, particularly when evaluating the risk of browser-based attacks in enterprise environments. The vulnerability's classification as a remote code execution flaw makes it particularly concerning for organizations that do not maintain strict network segmentation or have limited web filtering controls in place. The exploitation of such vulnerabilities in widely used browser engines like WebKit demonstrates the critical importance of timely patch management and the potential for widespread impact when core system components contain memory corruption flaws. This vulnerability highlights the ongoing challenges in securing complex software ecosystems where a single component flaw can affect multiple platforms and applications across an organization's technology stack. The security implications extend to user privacy and data protection, as successful exploitation could potentially lead to unauthorized access to sensitive information stored on affected devices.