CVE-2015-3744 in iTunes
Summary
by MITRE
WebKit, as used in Apple iOS before 8.4.1 and Safari before 6.2.8, 7.x before 7.1.8, and 8.x before 8.0.8, 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-2015-08-13-1 and APPLE-SA-2015-08-13-3.
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Analysis
by VulDB Data Team • 06/18/2022
CVE-2015-3744 represents a critical memory corruption vulnerability within WebKit engine that affected Apple's mobile and desktop browsers across multiple versions. This vulnerability resides in the rendering engine that powers Safari and iOS web browsers, making it a prime target for remote code execution attacks. The flaw manifests when processing malformed web content that triggers memory corruption conditions, allowing attackers to craft malicious websites that can compromise user systems. The vulnerability is particularly concerning because it affects a core component of Apple's ecosystem, enabling attackers to bypass standard security mechanisms through carefully constructed web pages.
The technical implementation of this vulnerability involves improper memory management during web page rendering processes, specifically within WebKit's JavaScript engine and HTML parser components. Attackers can exploit this weakness by hosting malicious content on compromised websites or through social engineering tactics that lure users to visit crafted web pages. The memory corruption occurs when the browser attempts to process malformed data structures, leading to unpredictable behavior that can be leveraged for arbitrary code execution. This type of vulnerability falls under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations that can result in memory corruption.
From an operational perspective, this vulnerability creates significant risk for users who browse the internet without proper security updates. The attack surface is extensive since it affects multiple versions of iOS and Safari across different release cycles, meaning that a substantial user base remained vulnerable for extended periods. The impact includes potential complete system compromise, data theft, and persistent backdoor installation. Security professionals should note that this vulnerability operates outside the typical exploitation patterns seen in other WebKit CVEs, indicating a distinct code path that requires specific analysis for effective mitigation. The vulnerability's classification aligns with attack techniques described in the ATT&CK framework under T1203, which covers Exploitation for Client Execution, and T1059, covering Command and Scripting Interpreter.
Organizations and users should prioritize immediate patching of affected systems to prevent exploitation attempts. Apple released security updates addressing this vulnerability in iOS 8.4.1 and corresponding Safari versions, which should be deployed immediately across all affected devices. Network administrators should implement web filtering solutions to block access to known malicious domains and monitor for exploitation attempts. The vulnerability highlights the importance of maintaining current security patches and demonstrates the critical need for browser sandboxing mechanisms. Additionally, user education regarding suspicious website visits and phishing attempts remains crucial in mitigating the risk associated with such memory corruption vulnerabilities that can lead to complete system compromise.