CVE-2012-3673 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-2012-3673 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 attackers to potentially execute arbitrary code on affected systems. The flaw manifests when iTunes encounters specially crafted web pages that trigger memory corruption conditions within the WebKit rendering engine, leading to unpredictable behavior including application crashes or complete system compromise. Unlike other WebKit vulnerabilities documented in APPLE-SA-2012-09-12-1, this particular issue exhibits distinct characteristics in its exploitation vectors and memory handling mechanisms.
The technical implementation of this vulnerability stems from improper memory management within WebKit's JavaScript engine and HTML rendering components. Attackers can construct web pages containing malformed JavaScript code or specially crafted HTML elements that, when processed by iTunes' embedded WebKit engine, cause buffer overflows or use-after-free conditions in memory allocation routines. These memory corruption issues typically occur during the parsing and execution of complex web content, particularly when handling dynamic content generation or manipulating DOM elements. The vulnerability exploits weaknesses in input validation and memory allocation procedures that fail to properly sanitize or limit the resources consumed during web page rendering. This type of flaw falls under CWE-122, which specifically addresses improper restriction of operations within a memory buffer, and may also relate to CWE-787, representing out-of-bounds write operations in memory management.
The operational impact of CVE-2012-3673 extends beyond simple application instability to encompass potential full system compromise capabilities for remote attackers. When successfully exploited, the vulnerability can result in arbitrary code execution with the privileges of the iTunes process, which typically runs with elevated permissions on modern operating systems. This could enable attackers to install malicious software, modify system files, or establish persistent access points within the affected environment. The denial of service aspect of the vulnerability creates additional risks by allowing attackers to disrupt legitimate iTunes usage through application crashes, potentially leading to service interruption or data loss scenarios. From an attacker perspective, this vulnerability represents a significant entry point since iTunes was widely installed across enterprise and consumer environments, making it an attractive target for initial access or privilege escalation attacks.
Mitigation strategies for this vulnerability require immediate patching of affected iTunes versions to 10.7 or later, which contain the necessary WebKit engine updates addressing the memory corruption issues. Organizations should implement network-based controls to prevent access to potentially malicious web content and consider deploying web application firewalls or content filtering solutions that can detect and block suspicious web traffic patterns. Security monitoring should focus on detecting unusual iTunes process behavior or memory consumption patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of keeping third-party applications updated, particularly those with embedded web rendering capabilities, as highlighted in the ATT&CK framework's application deployment tactics. System administrators should also consider implementing least privilege principles for iTunes usage and regularly audit installed applications to minimize potential attack surfaces. Additionally, user education regarding safe browsing practices and the risks of visiting untrusted websites remains crucial in preventing successful exploitation attempts.