CVE-2012-0617 in iOS
Summary
by MITRE
WebKit, as used in Apple iOS before 5.1 and iTunes before 10.6, 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-2012-03-07-1 and APPLE-SA-2012-03-07-2.
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Analysis
by VulDB Data Team • 01/11/2025
The vulnerability identified as CVE-2012-0617 represents a critical memory corruption flaw within WebKit, the web rendering engine that powers Apple's iOS browser and iTunes applications. This vulnerability specifically affects Apple iOS versions prior to 5.1 and iTunes versions before 10.6, creating a significant attack surface for remote threat actors who can leverage crafted web content to compromise affected systems. The flaw resides in how WebKit processes certain web page elements, leading to unpredictable memory behavior that can be exploited to execute arbitrary code or cause system instability through denial of service conditions.
The technical nature of this vulnerability stems from improper memory management within WebKit's rendering engine, where maliciously constructed web pages can trigger buffer overflows or use-after-free conditions in memory allocation routines. This type of flaw typically occurs when the browser engine fails to properly validate input data or properly manage memory references during web page rendering. The vulnerability allows attackers to manipulate memory pointers or overwrite critical system memory regions, enabling them to inject and execute malicious code with the privileges of the affected application. Such memory corruption issues fall under the CWE-122 category of "Heap Overflow" and are particularly dangerous because they can be exploited to bypass modern security mitigations like ASLR and DEP.
The operational impact of this vulnerability extends beyond simple exploitation, as it creates multiple attack vectors for threat actors targeting Apple ecosystem users. Remote attackers can craft malicious websites that automatically exploit this vulnerability when users visit them, requiring no additional user interaction beyond normal web browsing. This makes the vulnerability particularly dangerous for enterprise environments where users may inadvertently access compromised websites, or for threat actors who can leverage the vulnerability in phishing campaigns. The denial of service aspect of this vulnerability can also be used to disrupt services or create persistent availability issues for affected systems. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1499.004 for network denial of service, representing both execution and impact capabilities.
Mitigation strategies for CVE-2012-0617 primarily focus on immediate system updates and user education. Apple addressed this vulnerability through the release of iOS 5.1 and iTunes 10.6, which included patches to WebKit's memory management routines and improved input validation. Organizations should prioritize deployment of these security updates across all affected systems, as the vulnerability represents a high-severity risk that can be exploited remotely. Network administrators should also consider implementing web filtering solutions and monitoring for suspicious web traffic patterns that may indicate exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date software versions and demonstrates how seemingly minor memory management flaws can create significant security risks in widely used applications. Additionally, users should be educated about the dangers of visiting untrusted websites and the importance of keeping their devices updated with the latest security patches to prevent exploitation of such vulnerabilities.