CVE-2012-3647 in iOS
Summary
by MITRE
WebKit, as used in Apple iTunes before 10.7, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other WebKit CVEs listed in APPLE-SA-2012-09-12-1.
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Analysis
by VulDB Data Team • 12/30/2024
The vulnerability identified as CVE-2012-3647 represents a critical memory corruption flaw within WebKit engine components that were integrated into Apple iTunes version 10.6 and earlier. This issue specifically affects the web rendering capabilities of the media player application, creating a pathway for remote attackers to exploit the system through maliciously crafted web content. The vulnerability stems from improper handling of memory structures during web page processing, which can lead to unpredictable behavior when the affected software encounters specially designed web elements. The flaw is particularly concerning because it leverages the web browsing capabilities inherent to iTunes, which were not typically considered security boundaries for media software. Security researchers have classified this as a memory corruption vulnerability that can be triggered through web content execution, making it distinct from other WebKit-related vulnerabilities documented in the APPLE-SA-2012-09-12-1 advisory.
The technical implementation of this vulnerability involves memory corruption that occurs when WebKit processes certain web page elements within the iTunes environment. Attackers can construct malicious websites that contain specially crafted HTML, JavaScript, or multimedia content designed to trigger buffer overflows or other memory handling errors within the WebKit rendering engine. When iTunes attempts to render these crafted web pages, the memory corruption causes the application to crash or potentially allows for arbitrary code execution on the target system. The vulnerability demonstrates characteristics consistent with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions. These memory-related weaknesses typically manifest as application instability, crashes, or in more severe cases, complete system compromise when exploitation is successful. The flaw operates at the intersection of web rendering and application security, where the boundary between legitimate web content processing and malicious code execution becomes blurred.
The operational impact of CVE-2012-3647 extends beyond simple application instability to potentially enable full system compromise when exploited. Remote attackers can leverage this vulnerability to execute arbitrary code with the privileges of the iTunes process, which typically runs with elevated permissions on the target system. The denial of service aspect of this vulnerability can also be used as a vector for persistent disruption of services, particularly in environments where iTunes is used for automated content delivery or streaming services. In enterprise settings, this vulnerability could be exploited to gain unauthorized access to corporate networks, especially when iTunes is used for internal content management or as part of digital distribution systems. The attack surface is broadened by the fact that iTunes was widely deployed across both personal and professional environments, making the potential impact of this vulnerability significant. From an attack framework perspective, this vulnerability aligns with techniques described in the ATT&CK framework under the T1059 category for command and scripting interpreter, as successful exploitation could enable attackers to execute malicious commands through the compromised iTunes application.
Mitigation strategies for CVE-2012-3647 primarily focus on immediate software updates and application hardening measures. Apple addressed this vulnerability through the release of iTunes 10.7, which included patches to the WebKit engine that corrected the memory handling issues. Organizations should prioritize immediate deployment of the patched iTunes version and implement network-level controls to prevent access to known malicious websites. Security teams should also consider implementing application whitelisting policies that restrict iTunes from accessing untrusted web content, particularly in high-security environments. Additional protective measures include regular vulnerability assessments of iTunes installations, monitoring for unauthorized access attempts, and maintaining updated threat intelligence feeds to identify potential exploitation attempts. The vulnerability also underscores the importance of secure coding practices in web engine implementations and highlights the need for comprehensive security testing of integrated components. Organizations should consider alternative media management solutions that do not rely on web rendering engines for content display, particularly in environments where security is paramount. Regular security audits of integrated applications and their underlying web components remain essential for identifying similar vulnerabilities that may exist in other software components.