CVE-2014-4124 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," a different vulnerability than CVE-2014-4123.
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Analysis
by VulDB Data Team • 02/22/2022
Microsoft Internet Explorer versions 7 through 11 contained a critical elevation of privilege vulnerability that enabled remote attackers to execute arbitrary code with elevated privileges on affected systems. This vulnerability specifically exploited weaknesses in how Internet Explorer handled certain object model operations and memory management, creating an opportunity for attackers to bypass security restrictions and escalate their privileges from standard user level to system level access. The flaw was particularly dangerous because it could be triggered through malicious web content without requiring any user interaction beyond visiting a compromised website, making it highly exploitable in phishing campaigns and drive-by download scenarios.
The technical implementation of this vulnerability involved manipulating the browser's JavaScript engine and object handling mechanisms to achieve arbitrary code execution. Attackers could craft specially designed web pages that would exploit memory corruption issues within Internet Explorer's rendering engine, specifically targeting the way the browser managed objects in memory. This type of vulnerability falls under the CWE-119 weakness category, which encompasses memory safety issues including buffer overflows, out-of-bounds reads, and other memory corruption vulnerabilities. The exploitation technique leveraged the browser's COM object handling and JavaScript engine interactions to create conditions where attacker-controlled data could be executed as code with elevated privileges.
The operational impact of this vulnerability was severe across enterprise environments where Internet Explorer was widely deployed. Organizations with users accessing the internet through these vulnerable browsers faced significant risk of complete system compromise, as successful exploitation could allow attackers to install malware, modify system files, steal sensitive data, or establish persistent backdoors. The vulnerability's remote nature meant that attackers could exploit it without requiring physical access to target systems, making it particularly attractive for large-scale attacks. Security professionals noted that the vulnerability was frequently exploited in the wild, with various threat actors incorporating it into automated attack toolkits to target unpatched systems.
Mitigation strategies for this vulnerability required immediate patch deployment through Microsoft's regular security updates, as well as implementing additional security measures to reduce attack surface. Organizations should have implemented browser hardening techniques including disabling unnecessary browser features, configuring secure browsing settings, and deploying application whitelisting solutions to prevent exploitation. Network-based protections such as web application firewalls and intrusion detection systems could help detect and block exploitation attempts. The vulnerability also highlighted the importance of maintaining up-to-date security patches and implementing comprehensive vulnerability management programs. From an ATT&CK framework perspective, this vulnerability mapped to techniques involving privilege escalation and exploitation of software vulnerabilities, specifically targeting the execution and privilege escalation phases of the attack lifecycle. Organizations should have also considered implementing user education programs to reduce the risk of social engineering attacks that could leverage this vulnerability.