CVE-2012-0593 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-2012-0593 represents a critical memory corruption flaw within WebKit engine components that power Apple's iOS operating system and iTunes software. This vulnerability specifically affects versions of iOS prior to 5.1 and iTunes versions before 10.6, creating a significant security risk for users of these platforms. The flaw manifests through maliciously crafted websites that can trigger unpredictable behavior in the WebKit rendering engine, potentially leading to complete system compromise or service disruption. The vulnerability operates by exploiting memory management issues that occur during web content processing, making it particularly dangerous as it can be triggered through routine web browsing activities without any special user interaction beyond visiting compromised sites.
The technical implementation of this vulnerability involves memory corruption patterns that allow remote attackers to manipulate the WebKit engine's memory allocation and deallocation processes. When a user visits a malicious website, the crafted content triggers improper memory handling within the browser engine, potentially leading to buffer overflows, use-after-free conditions, or other memory management errors. These memory corruption issues can be leveraged to execute arbitrary code within the context of the affected application, effectively granting attackers full control over the device or application. The vulnerability's classification aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read conditions that can lead to memory corruption. The attack vector is particularly concerning because it requires no local privileges or user interaction beyond normal web browsing, making it highly exploitable in real-world scenarios.
The operational impact of CVE-2012-0593 extends beyond simple application crashes to potentially enable complete system compromise. Attackers can leverage this vulnerability to execute malicious code that could install malware, steal sensitive user data, or take control of the device entirely. The vulnerability affects not only iOS devices but also iTunes installations on desktop systems, creating a broad attack surface across Apple's ecosystem. The memory corruption nature of the flaw means that even if the initial exploit fails, the system may experience instability or crashes that could be used for denial-of-service attacks. This vulnerability demonstrates the critical importance of browser engine security, as WebKit serves as the foundation for web content rendering across multiple Apple platforms and third-party applications. The attack scenario described in the vulnerability description indicates that this flaw differs from other WebKit vulnerabilities referenced in Apple security advisories, suggesting a unique memory management issue that requires specific mitigation approaches.
Mitigation strategies for CVE-2012-0593 focus primarily on immediate system updates and patches provided by Apple. Users must upgrade to iOS 5.1 or later versions and iTunes 10.6 or later to address the vulnerability. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly. Network administrators can consider implementing web content filtering solutions to block access to known malicious sites, though this represents a secondary defense measure. The vulnerability's nature makes it particularly suitable for exploitation through drive-by download attacks, where simply visiting a compromised website can lead to system compromise. Security monitoring should include detection of unusual memory usage patterns or application crashes that might indicate exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and execution through web-based attacks, specifically covering T1059.007 for script-based execution and T1068 for local privilege escalation. The vulnerability underscores the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect against browser-based exploitation techniques that can bypass traditional security controls.