CVE-2012-3632 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-2012-3632 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 attacks that could compromise the entire system. The flaw manifests when iTunes attempts to render web pages that contain malformed or specially constructed content designed to exploit memory management weaknesses within the WebKit rendering engine.
The technical nature of this vulnerability stems from improper memory handling during web content processing, where WebKit fails to properly validate or sanitize input data from web pages. When iTunes encounters malicious web content, the memory corruption occurs during the parsing and rendering phases, leading to unpredictable behavior that can be exploited by attackers to inject and execute arbitrary code within the iTunes process context. This type of vulnerability falls under the CWE-125 vulnerability category, which describes out-of-bounds read conditions where an attacker can access memory locations beyond the intended bounds of allocated memory regions. The memory corruption typically results in stack or heap corruption that can be leveraged to overwrite critical program execution pointers or control flow information.
The operational impact of CVE-2012-3632 extends beyond simple application instability, as it provides attackers with a mechanism to achieve remote code execution capabilities. When successfully exploited, this vulnerability allows threat actors to execute arbitrary commands with the privileges of the iTunes process, potentially enabling full system compromise. The vulnerability is particularly concerning because iTunes was often installed on systems with elevated privileges, and the attack vector requires no local access or authentication, making it a prime target for remote exploitation. This vulnerability can be classified under ATT&CK technique T1059.007, which describes the use of command and scripting interpreter for remote code execution, as attackers can leverage the corrupted memory state to inject malicious code that executes within the iTunes application environment.
The attack scenario typically involves an attacker hosting malicious web content on a remote server that, when accessed through iTunes' web browsing capabilities, triggers the memory corruption vulnerability. This could occur through various means such as phishing emails containing links to malicious websites, compromised web portals, or even malicious advertisements that automatically load content within iTunes' web rendering engine. The vulnerability's exploitation does not require specific user interaction beyond visiting the malicious site, making it particularly dangerous for widespread deployment. The memory corruption can manifest as either a crash or more severe conditions that allow for code execution, depending on the specific memory layout and timing of the attack.
Mitigation strategies for CVE-2012-3632 primarily focus on immediate software updates and patches provided by Apple, as the vulnerability was addressed in iTunes version 10.7 and subsequent releases. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive the necessary security updates promptly. Additionally, network-based security controls such as web application firewalls and content filtering systems can provide additional layers of protection by blocking access to known malicious domains or content patterns that may trigger this vulnerability. The remediation process should also include user education regarding the dangers of visiting untrusted websites and the importance of maintaining updated software versions. Security monitoring should focus on detecting unusual network traffic patterns or system behavior that might indicate exploitation attempts, particularly when users access potentially malicious web content through iTunes or related applications.