CVE-2012-3613 in iOS
Summary
by MITRE
WebKit, as used in Apple iTunes before 10.7, 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-2012-09-12-1.
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Analysis
by VulDB Data Team • 04/13/2021
CVE-2012-3613 represents a critical memory corruption vulnerability within WebKit engine that was embedded in Apple iTunes version 10.6 and earlier. This vulnerability falls under the category of remote code execution flaws, specifically targeting the rendering engine that processes web content within the iTunes application. The flaw manifests when WebKit encounters maliciously crafted web content that triggers improper memory handling during content rendering, leading to unpredictable behavior including arbitrary code execution or application crashes.
The technical nature of this vulnerability stems from insufficient input validation and memory management within WebKit's JavaScript engine and rendering components. Attackers can construct malicious websites that exploit buffer overflows, use-after-free conditions, or other memory corruption patterns that occur when the WebKit engine attempts to parse and render crafted HTML, JavaScript, or multimedia content. These memory corruption issues typically arise from improper handling of dynamically allocated memory blocks, leading to memory addresses being overwritten or accessed after deallocation. The vulnerability is particularly dangerous because it operates within the context of a trusted application, allowing attackers to leverage the iTunes application's privileges to execute malicious payloads.
The operational impact of CVE-2012-3613 extends beyond simple application instability to encompass significant security risks for end users. When successfully exploited, this vulnerability enables remote attackers to execute arbitrary code on vulnerable systems with the privileges of the iTunes application process. This could potentially allow attackers to install malware, modify system files, or establish persistent backdoors. The vulnerability affects a wide range of Apple devices including Macintosh computers running iTunes 10.6 or earlier, making it particularly dangerous in enterprise environments where iTunes is commonly used for device management and media synchronization. The fact that this vulnerability operates through web content means that users could be compromised simply by visiting malicious websites, making it an ideal vector for drive-by attacks.
The exploitability of this vulnerability is enhanced by the widespread use of iTunes across Apple's ecosystem and the trust users place in the application. Attackers can craft malicious web pages that appear legitimate but contain embedded payloads designed to trigger the memory corruption within WebKit. These attacks often leverage social engineering techniques to convince users to visit compromised websites or click on malicious links. The vulnerability's classification aligns with CWE-125: "Out-of-bounds Read" and CWE-787: "Out-of-bounds Write" categories, which represent the fundamental memory safety issues that enable such exploits. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through malicious websites and privilege escalation through application exploitation.
Mitigation strategies for CVE-2012-3613 primarily involve immediate software updates to iTunes 10.7 or later versions where Apple has patched the WebKit memory corruption issues. System administrators should implement comprehensive patch management policies to ensure all iTunes installations are updated promptly. Additional protective measures include implementing web filtering solutions, disabling automatic web content rendering within iTunes, and educating users about the dangers of visiting untrusted websites. Network-level protections such as intrusion detection systems can help detect exploitation attempts, while endpoint protection solutions should monitor for suspicious process behaviors that might indicate successful exploitation. Organizations should also consider implementing application whitelisting policies that restrict the execution of unauthorized code within iTunes and related applications. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software and the risks associated with running outdated applications that may contain unpatched security flaws.