CVE-2011-1453 in Safari
Summary
by MITRE
WebKit, as used in Apple Safari before 5.0.6, 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-2011-07-20-1.
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Analysis
by VulDB Data Team • 01/19/2025
The vulnerability identified as CVE-2011-1453 represents a critical memory corruption flaw within WebKit engine's implementation in Apple Safari browsers prior to version 5.0.6. This vulnerability falls under the broader category of remote code execution exploits that can be triggered through maliciously crafted web content, making it particularly dangerous in web-based attack scenarios. The flaw specifically manifests in how WebKit handles certain web page elements, creating conditions that lead to unpredictable memory behavior and potential system compromise. This issue is distinct from other WebKit vulnerabilities documented in APPLE-SA-2011-07-20-1, indicating a unique code path or implementation weakness that required separate remediation efforts. The vulnerability's classification aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, covering out-of-bounds write operations that can lead to memory corruption.
The technical exploitation of this vulnerability occurs when a malicious web page contains specially crafted HTML or JavaScript elements that trigger memory corruption within the WebKit rendering engine. When Safari processes these malformed elements, the browser's memory management system encounters unexpected data structures or operations that cause memory corruption, potentially leading to arbitrary code execution. The memory corruption typically manifests through buffer overflows, use-after-free conditions, or other memory management flaws that allow attackers to manipulate program execution flow. These conditions can be leveraged to inject malicious code into the browser process, effectively granting remote attackers control over the affected system. The vulnerability's impact extends beyond simple code execution to include potential denial of service scenarios where application crashes occur due to corrupted memory states.
The operational impact of CVE-2011-1453 presents significant security risks for users of affected Safari versions, as it enables sophisticated remote attacks without requiring local system access or user interaction beyond visiting a malicious website. Attackers can craft web pages that automatically exploit this vulnerability when loaded in Safari, making it particularly dangerous in phishing campaigns or malicious advertising scenarios. The vulnerability's exploitation can result in complete system compromise, data theft, or persistent backdoor installation, depending on the attacker's objectives. Organizations with Safari-based workflows face increased risk of targeted attacks, especially in environments where users may inadvertently visit compromised websites or where security controls are insufficient to prevent such attacks. The vulnerability also impacts enterprise security posture by creating potential attack vectors through web-based delivery mechanisms that bypass traditional network security controls.
Mitigation strategies for CVE-2011-1453 primarily focus on immediate software updates and browser version management to ensure affected systems receive the patched WebKit implementation. Apple's release of Safari 5.0.6 included specific patches addressing the memory corruption conditions that enabled this vulnerability, making version updates the primary defense mechanism. Network administrators should implement comprehensive patch management policies to ensure all user devices receive security updates promptly. Additional protective measures include deploying web content filters, implementing browser security policies that restrict potentially malicious content, and monitoring for suspicious web traffic patterns that may indicate exploitation attempts. Security professionals should consider implementing sandboxing technologies and browser hardening configurations to limit the potential impact of successful exploitation attempts. The vulnerability also underscores the importance of maintaining up-to-date security intelligence and threat monitoring to identify and respond to similar memory corruption vulnerabilities in web browsers and other software applications.