CVE-2017-2354 in iTunes
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.2.1 is affected. Safari before 10.0.3 is affected. iCloud before 6.1.1 is affected. iTunes before 12.5.5 is affected. tvOS before 10.1.1 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 • 11/04/2022
The vulnerability identified as CVE-2017-2354 represents a critical memory corruption flaw within Apple's WebKit rendering engine that affected multiple Apple operating systems and applications. This vulnerability specifically impacts iOS versions prior to 10.2.1, Safari versions before 10.0.3, iCloud versions before 6.1.1, iTunes versions before 12.5.5, and tvOS versions before 10.1.1. The WebKit component serves as the core rendering engine for Apple's web browsing functionality across all these platforms, making this vulnerability particularly dangerous as it could be exploited across multiple attack vectors. The flaw resides in how WebKit processes certain web content, creating opportunities for remote code execution or denial of service conditions that could compromise the affected systems.
This memory corruption vulnerability operates through a sophisticated attack vector that leverages crafted web content to trigger undefined behavior within the WebKit engine. Attackers can construct malicious websites that, when loaded in affected browsers or applications, cause memory corruption that leads to arbitrary code execution. The vulnerability's exploitation potential stems from WebKit's complex handling of web page elements and JavaScript execution contexts, where improper memory management allows attackers to manipulate heap memory structures. The memory corruption typically manifests as buffer overflows, use-after-free conditions, or other heap-based vulnerabilities that can be leveraged to gain unauthorized control over the affected system's execution flow. According to CWE classification, this vulnerability aligns with CWE-121, which deals with stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow conditions.
The operational impact of CVE-2017-2354 extends far beyond simple denial of service scenarios, as the remote code execution capability presents significant threats to user data and system integrity. When successfully exploited, attackers can execute malicious code with the privileges of the affected application, potentially leading to complete system compromise. The vulnerability affects not only web browsers but also applications that utilize WebKit for web content rendering, including iTunes and iCloud applications. This broad impact means that users could be compromised through various attack vectors including malicious websites, email attachments, or even compromised web applications that users might interact with during normal browsing activities. The vulnerability's persistence across multiple Apple platforms demonstrates the widespread nature of the flaw and the significant risk it poses to Apple ecosystem users.
Mitigation strategies for CVE-2017-2354 primarily focus on immediate software updates and system hardening measures. Apple released patches for all affected versions, making it imperative for users to update their systems to the latest available versions, particularly iOS 10.2.1, Safari 10.0.3, iCloud 6.1.1, iTunes 12.5.5, and tvOS 10.1.1. Organizations should implement network monitoring to detect potential exploitation attempts and deploy web application firewalls to filter malicious content. From an ATT&CK framework perspective, this vulnerability maps to techniques involving exploitation for execution and privilege escalation, making it a critical concern for defensive security teams. Additional mitigations include implementing browser sandboxing, disabling unnecessary web features, and educating users about the dangers of visiting untrusted websites. Security professionals should also consider network segmentation and monitoring for unusual outbound connections that might indicate successful exploitation attempts. The vulnerability's nature as a memory corruption issue also makes it particularly susceptible to exploit mitigation techniques such as address space layout randomization and stack canaries that help prevent successful exploitation.