CVE-2012-3641 in iOS
Summary
by MITRE
WebKit, as used in Apple Safari before 6.0, 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-2012-07-25-1.
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Analysis
by VulDB Data Team • 01/04/2025
The vulnerability identified as CVE-2012-3641 represents a critical memory corruption flaw within WebKit engine components that power Apple Safari browsers prior to version 6.0. This vulnerability manifests through crafted web content that can trigger arbitrary code execution or denial of service conditions, making it particularly dangerous for web-based attack scenarios. The flaw specifically affects the rendering and processing mechanisms within WebKit's JavaScript engine and memory management systems, creating opportunities for attackers to exploit memory corruption vulnerabilities that can lead to complete system compromise.
This memory corruption vulnerability operates through improper handling of specific web page elements and JavaScript constructs that cause WebKit to allocate or access memory in unintended ways. The flaw likely involves buffer overflows, use-after-free conditions, or other memory management errors that occur when processing malformed web content. Attackers can craft malicious websites that, when loaded in affected Safari browsers, trigger these memory corruption conditions through carefully constructed HTML, CSS, or JavaScript elements that exploit the underlying WebKit engine's memory handling mechanisms.
The operational impact of this vulnerability extends beyond simple application crashes to potentially enable full remote code execution capabilities. When exploited successfully, attackers can gain arbitrary code execution privileges on the target system, allowing them to install malware, steal sensitive data, or take complete control of the affected browser and underlying operating system. The vulnerability's classification as a memory corruption issue aligns with common CWE categories such as CWE-119 Improper Access to Memory and CWE-121 Heap-based Buffer Overflow, which are frequently targeted by advanced persistent threats and zero-day exploits.
The attack surface for this vulnerability encompasses all users of Safari versions prior to 6.0, making it particularly concerning given Safari's widespread usage on macOS systems. The exploitation typically requires social engineering elements to convince users to visit malicious websites, though the underlying vulnerability can be leveraged for automated attacks against vulnerable systems. This vulnerability demonstrates the critical importance of timely security updates and patch management, as the flaw existed in widely distributed software versions and provided attackers with a reliable path to system compromise.
Mitigation strategies for CVE-2012-3641 primarily focus on immediate patching and system updates to the latest Safari versions that contain the necessary WebKit security fixes. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly. Browser security configurations can be enhanced through sandboxing mechanisms and restricted privileges for web browsing activities, though these measures provide only partial protection against sophisticated exploits. Additionally, network-based intrusion detection systems should be configured to monitor for known exploit patterns and malicious web content that could leverage this vulnerability.
The vulnerability's characteristics align with ATT&CK tactics such as T1059 Command and Scripting Interpreter and T1203 Exploitation for Client Execution, which describe how attackers can leverage browser vulnerabilities to execute malicious code. The memory corruption nature of the flaw also relates to ATT&CK technique T1068 Exploitation for Privilege Escalation, as successful exploitation could potentially lead to elevated system privileges. Security professionals should consider this vulnerability within broader threat modeling frameworks and implement layered defense strategies that include web application firewalls, browser hardening, and user education to reduce the risk of successful exploitation.