CVE-2014-6329 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 11 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," a different vulnerability than CVE-2014-6327 and CVE-2014-6376.
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Analysis
by VulDB Data Team • 03/01/2022
Microsoft Internet Explorer 11 contains a critical memory corruption vulnerability that enables remote attackers to execute arbitrary code or induce denial of service conditions through maliciously crafted web content. This vulnerability represents a distinct issue from CVE-2014-6327 and CVE-2014-6376, highlighting the complex nature of memory safety issues in web browsers. The flaw manifests when Internet Explorer processes specially constructed web pages that trigger improper memory handling during rendering operations. Attackers can exploit this weakness by hosting malicious content on compromised websites or through social engineering campaigns that direct users to visit harmful pages. The vulnerability falls under the CWE-125 weakness category, which describes out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. From an operational perspective, this vulnerability poses significant risk to enterprise environments where Internet Explorer remains in use, as it can be exploited through standard web browsing activities without requiring any special privileges or user interaction beyond visiting a malicious site. The memory corruption occurs during the browser's processing of web content, potentially allowing attackers to overwrite critical memory locations or manipulate heap structures to achieve code execution. This vulnerability aligns with ATT&CK technique T1203, which involves exploiting software vulnerabilities to gain execution privileges, and T1059, which covers command and scripting interpreters used for execution. The impact extends beyond simple code execution to include potential denial of service scenarios where system resources become exhausted or critical browser processes crash, rendering the affected system unusable. Organizations running Internet Explorer 11 are particularly vulnerable as this browser version lacks the modern security mitigations present in later versions. The exploitation typically requires the user to visit a malicious website, making user awareness and browser security updates critical defensive measures. Microsoft addressed this vulnerability through security updates that modified the browser's memory management routines and implemented additional bounds checking mechanisms. The vulnerability demonstrates the ongoing challenges in securing complex web browsers where millions of lines of code must interact seamlessly while maintaining security boundaries. Security professionals should prioritize patching this vulnerability as part of their remediation efforts, particularly in environments where legacy browser support is required. The issue underscores the importance of maintaining up-to-date browser versions and implementing network-based security controls such as web application firewalls and content filtering systems. Organizations should also consider implementing user education programs to reduce the risk of successful exploitation through social engineering attacks. This vulnerability represents a classic example of how memory safety issues in browser implementations can create persistent security risks that require ongoing attention and remediation efforts. The technical nature of the flaw requires careful monitoring and rapid response procedures to prevent exploitation in production environments.