CVE-2012-3603 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 • 04/13/2021
The vulnerability described in CVE-2012-3603 represents a critical memory corruption flaw within WebKit engine's implementation in Apple Safari versions prior to 6.0. This issue falls under the category of remote code execution vulnerabilities that can be exploited through maliciously crafted web content, making it particularly dangerous in web browsing environments where users frequently encounter untrusted content. The vulnerability specifically affects the rendering engine's handling of web page elements, creating conditions where malicious code can be executed remotely without user interaction or explicit consent.
The technical nature of this flaw involves improper memory management during web page processing, particularly when handling complex web page structures or specific JavaScript operations. WebKit's memory allocation and deallocation mechanisms fail to properly validate input data or maintain memory boundaries when processing crafted web content, leading to memory corruption that can be leveraged by attackers to execute arbitrary code on affected systems. This type of vulnerability typically manifests through buffer overflows, use-after-free conditions, or other memory management errors that result in unpredictable program behavior and potential code execution.
The operational impact of CVE-2012-3603 extends beyond simple application crashes, as it enables full remote code execution capabilities that could allow attackers to gain complete control over affected systems. Users visiting malicious websites could unknowingly trigger the exploit, making this vulnerability particularly dangerous for general web browsing activities. The vulnerability's classification as a memory corruption issue aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations. These weaknesses create opportunities for attackers to manipulate program execution flow and potentially escalate privileges.
The exploitation of this vulnerability demonstrates the critical importance of web browser security and the need for comprehensive patch management strategies. Attackers could leverage this flaw to install malware, steal sensitive information, or perform other malicious activities without user awareness. The vulnerability's distinction from other WebKit CVEs mentioned in APPLE-SA-2012-07-25-1 highlights the complexity of web browser security and the need for thorough security reviews of rendering engines. Organizations should implement immediate patching procedures and consider network-level protections to mitigate the risk of exploitation. The ATT&CK framework categorizes this vulnerability under T1059 for command and scripting interpreter usage, as successful exploitation would likely involve executing malicious code within the browser environment.
Mitigation strategies should include immediate deployment of Apple's security patches for Safari 6.0 and subsequent versions, along with browser hardening measures such as enabling sandboxing features and implementing content security policies. Security teams should also consider network monitoring for exploitation attempts and maintain updated threat intelligence feeds to identify potential attack vectors. Regular security assessments of web browser configurations and user education programs about safe browsing practices can further reduce the risk of successful exploitation. The vulnerability underscores the necessity of continuous security updates and the importance of maintaining current software versions to protect against known security flaws.