CVE-2014-6330 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 03/01/2022
Microsoft Internet Explorer 9 suffered from a critical memory corruption vulnerability that enabled remote attackers to execute arbitrary code or cause denial of service conditions through maliciously crafted websites. This vulnerability represents a classic heap-based buffer overflow scenario that occurs when the browser processes specially crafted web content. The flaw exists in the way IE9 handles memory allocation and deallocation during web page rendering, particularly when processing certain JavaScript objects or DOM elements. Attackers could leverage this vulnerability by hosting malicious content on compromised websites or through social engineering tactics that诱导 users to visit exploit pages. The memory corruption aspect of this vulnerability allows for arbitrary code execution because the attacker can manipulate memory layout to redirect program execution flow. This particular vulnerability aligns with CWE-121, heap-based buffer overflow, and demonstrates how improper memory management can create severe security implications. The impact extends beyond simple code execution to include potential system compromise, as successful exploitation could lead to full system control. The vulnerability affects users running IE9 on Windows operating systems and represents a significant risk because IE9 was widely deployed in enterprise environments, making the attack surface particularly large.
The technical nature of this memory corruption vulnerability stems from improper input validation and memory handling within IE9's rendering engine. When processing malicious web content, the browser fails to properly validate memory boundaries during object allocation, leading to buffer overflows that can be exploited to overwrite critical memory segments. The vulnerability typically manifests when IE9 encounters crafted JavaScript or HTML elements that trigger specific memory allocation patterns. Attackers can craft payloads that manipulate the browser's memory layout to inject and execute malicious code within the browser process context. This exploit technique falls under the ATT&CK framework's technique T1059 for execution through scripting and T1203 for exploitation for execution. The memory corruption occurs at the kernel level where the browser's memory management routines fail to properly handle edge cases in memory allocation. The vulnerability is particularly dangerous because it operates within the browser's trusted execution environment, making it difficult to detect through traditional security measures.
The operational impact of CVE-2014-6330 extends far beyond individual user compromise to encompass enterprise security risks and operational disruption. Organizations with significant IE9 deployments faced immediate security concerns, as the vulnerability could be exploited through simple web browsing activities without requiring any special privileges from victims. The denial of service component of this vulnerability meant that even unsuccessful exploitation attempts could crash the browser or system, creating operational disruption. Security teams had to rapidly deploy patches and implement temporary mitigations while working to understand the full scope of potential exploitation. The vulnerability's exploitability was enhanced by the fact that IE9 was often the default browser in many enterprise environments, making widespread compromise a realistic threat. Network administrators had to implement additional monitoring and filtering measures to detect potential exploitation attempts. The vulnerability also highlighted the importance of browser security and the need for regular patch management in enterprise security programs.
Mitigation strategies for CVE-2014-6330 focused on both immediate remediation and long-term security improvements. Microsoft released a security update that patched the memory corruption issue, but organizations needed to ensure timely deployment across all affected systems. Browser isolation techniques and application whitelisting provided additional layers of protection while patches were being deployed. Security configurations such as disabling script execution in certain contexts or implementing enhanced browser security policies helped reduce exploitation risk. The vulnerability underscored the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies. Organizations should have implemented network monitoring to detect potential exploitation attempts and established incident response procedures for handling browser-based attacks. Regular security assessments and penetration testing helped identify additional vulnerabilities in the browser environment. The incident also prompted organizations to reconsider their browser support policies and transition away from older, unsupported browser versions. Compliance with industry standards such as NIST SP 800-40 and ISO 27001 became more critical as organizations sought to demonstrate proper vulnerability management practices. Long-term mitigation involved implementing automated patch management systems and maintaining awareness of emerging browser security threats through security bulletins and threat intelligence feeds.