CVE-2012-3611 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 • 01/03/2025
The vulnerability identified as CVE-2012-3611 represents a critical memory corruption flaw within WebKit engine's implementation in Apple Safari versions prior to 6.0. This vulnerability exists in the browser's rendering engine that processes web content, specifically affecting how WebKit handles certain crafted web page elements. The flaw enables remote attackers to exploit memory corruption conditions that can lead to arbitrary code execution or deliberate application crashes, making it a significant security risk for users of affected Safari versions.
The technical nature of this vulnerability stems from improper memory management within WebKit's JavaScript engine and rendering components. Attackers can craft malicious web pages that trigger buffer overflows or use-after-free conditions when the browser processes specific HTML elements or JavaScript code. These memory corruption issues typically occur during the parsing and execution of web content, where insufficient bounds checking or improper memory deallocation allows malicious input to overwrite critical memory regions. The vulnerability operates at the intersection of browser engine security and memory safety, making it particularly dangerous as it can be exploited through standard web browsing activities without requiring any special privileges or user interaction beyond visiting a malicious website.
The operational impact of CVE-2012-3611 extends beyond simple application crashes to encompass full system compromise potential. When successful, this vulnerability allows attackers to execute arbitrary code with the privileges of the browser process, potentially leading to complete system compromise. The memory corruption can be leveraged to inject malicious payloads, escalate privileges, or establish persistent access to affected systems. Users of Safari versions before 6.0 were particularly vulnerable as the patch that addressed this issue was included in the Safari 6.0 release, making it essential for organizations to implement timely updates as part of their security maintenance protocols. This vulnerability aligns with common attack patterns documented in the attack technique framework where memory corruption vulnerabilities are frequently exploited in the initial access phase of cyber attacks.
Organizations should implement immediate remediation measures by upgrading to Safari 6.0 or later versions that contain the necessary security patches. Additionally, network administrators should consider implementing web filtering solutions that can block access to known malicious domains and monitor for suspicious web traffic patterns. The vulnerability demonstrates the importance of keeping browser software updated, as it represents a classic example of how outdated software components can provide attackers with persistent entry points. Security teams should also implement monitoring for unusual browser behavior or memory usage patterns that might indicate exploitation attempts, as this vulnerability can be particularly stealthy in its execution and difficult to detect through traditional security controls. This case highlights the necessity of comprehensive vulnerability management programs that address not only known exploits but also the broader security landscape of browser-based attack surfaces.