CVE-2014-8966 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 6 through 8 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
The vulnerability identified as CVE-2014-8966 represents a critical memory corruption flaw affecting Microsoft Internet Explorer versions 6 through 8. This vulnerability falls under the Common Weakness Enumeration category CWE-125, which describes out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. The flaw specifically manifests when Internet Explorer processes malformed or crafted web content, creating a scenario where attacker-controlled data can overwrite memory locations beyond intended boundaries.
The technical exploitation of this vulnerability occurs through the manipulation of memory structures within the browser's rendering engine, particularly affecting the way Internet Explorer handles certain object models and memory allocation patterns. When a user visits a malicious website containing specially crafted HTML or JavaScript code, the browser's memory management system becomes compromised, leading to unpredictable behavior that can be leveraged for remote code execution. This type of vulnerability is classified as a heap-based buffer overflow according to ATT&CK technique T1203, where attackers manipulate heap memory to achieve their objectives.
The operational impact of CVE-2014-8966 extends beyond simple exploitation to encompass significant security risks for organizations relying on legacy Internet Explorer versions. The vulnerability enables attackers to execute arbitrary code with the privileges of the logged-in user, potentially leading to full system compromise, data exfiltration, or establishment of persistent backdoors. The memory corruption aspect means that the effects can be unpredictable and may manifest as system crashes, application instability, or complete system failure, making it particularly dangerous for enterprise environments where legacy systems remain in use.
Organizations affected by this vulnerability should prioritize immediate remediation through Microsoft's security patches, as the supported versions of Internet Explorer containing this flaw are no longer receiving security updates. The mitigation strategy should include mandatory browser upgrades to supported versions, implementation of security features such as Enhanced Protected Mode, and deployment of web application firewalls to detect and block malicious content. Additionally, security awareness training should emphasize the dangers of visiting untrusted websites, as social engineering remains a primary attack vector for exploiting such memory corruption vulnerabilities. The vulnerability demonstrates the critical importance of maintaining up-to-date software systems and the inherent risks associated with running deprecated browser versions in enterprise environments.