CVE-2012-3676 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-2012-3676 represents a critical memory corruption flaw within WebKit engine components that were integrated into Apple iTunes version 10.6 and earlier. This vulnerability specifically affects the web rendering capabilities of iTunes when processing maliciously crafted web content, creating a pathway for remote code execution and system instability. The flaw exists within the browser engine that iTunes utilizes to display web content, particularly when users navigate to compromised websites or encounter malicious web pages. Unlike other WebKit vulnerabilities documented in APPLE-SA-2012-09-12-1, this particular issue demonstrates distinct characteristics in its exploitation methods and impact vectors.
The technical implementation of this vulnerability stems from improper memory management within WebKit's rendering engine, specifically when handling certain web page elements or JavaScript constructs. Attackers can craft malicious web content that, when loaded through iTunes' integrated browser, triggers memory corruption errors that result in unpredictable behavior. These memory corruption issues typically manifest as buffer overflows, use-after-free conditions, or other memory management flaws that allow attackers to manipulate the application's memory space. The exploitation process leverages the webkit engine's handling of specific HTML or JavaScript elements that cause memory allocation errors when processed by the vulnerable iTunes version.
The operational impact of CVE-2012-3676 extends beyond simple application crashes to encompass full remote code execution capabilities. When successfully exploited, attackers can gain arbitrary code execution within the iTunes process context, potentially allowing them to install malware, modify system files, or escalate privileges. The vulnerability also enables denial of service attacks that can crash the iTunes application repeatedly, disrupting user access to media management features. This flaw particularly affects users who frequently access web content through iTunes or who visit compromised websites, as the vulnerability can be triggered automatically without user interaction beyond visiting the malicious site.
Mitigation strategies for this vulnerability primarily involve immediate software updates to iTunes version 10.7 or later, which contain patches addressing the underlying memory corruption issues. System administrators should prioritize deployment of this update across all affected systems, particularly in enterprise environments where iTunes is widely used for media management. Additional protective measures include implementing web content filtering solutions, disabling web browsing capabilities within iTunes when not required, and monitoring for suspicious network activity that might indicate exploitation attempts. Organizations should also consider network segmentation to limit exposure and implement endpoint protection solutions that can detect and block malicious web content before it reaches vulnerable systems.
This vulnerability aligns with CWE-119, which addresses "Improper Access to Memory Location" and specifically encompasses memory corruption issues that can lead to arbitrary code execution. The attack vector follows ATT&CK technique T1203, "Exploitation for Client Execution," where adversaries leverage vulnerabilities in software applications to execute malicious code on target systems. The vulnerability demonstrates the importance of comprehensive software security testing and the need for regular patch management processes to address known security flaws in widely deployed applications. The distinct nature of this vulnerability compared to other WebKit CVEs highlights the complexity of modern web browser engines and the ongoing challenges in securing complex software components that integrate multiple technologies.