CVE-2014-6347 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."
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Analysis
by VulDB Data Team • 02/24/2022
Microsoft Internet Explorer 11 contains a critical memory corruption vulnerability that enables remote attackers to execute arbitrary code or cause denial of service when users visit malicious websites. This vulnerability stems from improper handling of memory operations within the browser's rendering engine, specifically affecting how Internet Explorer processes certain web content structures. The flaw represents a classic heap-based buffer overflow condition that occurs during memory allocation and deallocation processes when parsing specially crafted web pages. Attackers can leverage this vulnerability by hosting malicious content on compromised websites or through social engineering tactics that诱导 users to visit harmful web pages. The vulnerability affects Windows 8.1 and Windows Server 2012 R2 systems where Internet Explorer 11 is installed, making it particularly dangerous in enterprise environments where these operating systems are prevalent. This issue aligns with CWE-121, heap-based buffer overflow, and maps to attack techniques in the MITRE ATT&CK framework under T1203, Exploitation for Client Execution, and T1059, Command and Scripting Interpreter, as attackers can execute arbitrary code through browser-based attacks. The memory corruption occurs when Internet Explorer attempts to process malformed web content that triggers improper memory management operations, potentially leading to memory corruption that can be exploited to gain unauthorized system access. The vulnerability's remote exploitation capability makes it particularly dangerous as it requires no local system access or user interaction beyond visiting a malicious website. This flaw has significant operational impact on organizations as it can lead to complete system compromise, data exfiltration, and persistent backdoor access. The vulnerability exists due to insufficient input validation and memory management controls within Internet Explorer's JavaScript engine and HTML parser components. Organizations must understand that this vulnerability can be exploited through various attack vectors including drive-by downloads, malicious advertisements, and compromised websites. The exploitability of this vulnerability is enhanced by the fact that it targets the browser's core functionality, making it difficult to detect through traditional network monitoring. Security professionals should note that this vulnerability demonstrates the ongoing challenges with browser security and memory management in complex software environments. The memory corruption issue typically manifests as application crashes or system instability, but can be leveraged for more sophisticated attacks that bypass security controls. This vulnerability underscores the importance of keeping browser software updated and implementing network security measures such as web application firewalls and content filtering. The remediation approach involves applying Microsoft's security patches and updates, disabling unnecessary browser features, and implementing security policies that restrict access to untrusted websites. Organizations should also consider implementing sandboxing technologies and browser hardening techniques to limit the potential impact of such vulnerabilities. The vulnerability's classification as a remote code execution flaw places it in the highest severity category, requiring immediate attention from security teams and system administrators. This flaw exemplifies how memory corruption vulnerabilities in widely used software can create extensive security risks across multiple environments and attack scenarios. The exploitability of this vulnerability through web-based attacks highlights the need for comprehensive security awareness training and network monitoring to detect and prevent such incidents. Security teams must also consider the broader implications of this vulnerability on their overall security posture, particularly in environments where Internet Explorer remains a required browser application.