CVE-2014-1781 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 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," a different vulnerability than CVE-2014-1792, CVE-2014-1804, and CVE-2014-2770.
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Analysis
by VulDB Data Team • 09/01/2025
Microsoft Internet Explorer 8 remains vulnerable to a critical memory corruption flaw that enables remote attackers to execute arbitrary code or induce denial of service conditions through maliciously crafted web content. This vulnerability specifically affects the browser's handling of memory structures during web page rendering, creating an exploitable condition that can be triggered by visiting a compromised website. The flaw resides in the browser's object model and memory management systems, where improper validation of user-supplied data leads to memory corruption that can be leveraged for privilege escalation or system compromise. Unlike related vulnerabilities such as CVE-2014-1792, CVE-2014-1804, and CVE-2014-2770, this particular weakness demonstrates distinct characteristics in how it corrupts memory structures within the browser's JavaScript engine and rendering components. The vulnerability falls under the CWE-125 weakness category, representing an out-of-bounds read condition that allows attackers to access memory locations beyond allocated boundaries. From an operational perspective, this flaw represents a significant risk to enterprise environments where legacy Internet Explorer 8 installations remain in use, as it can be exploited through social engineering attacks or drive-by downloads without requiring user interaction beyond visiting a malicious webpage. The attack surface extends beyond simple code execution to include potential privilege escalation scenarios, where an attacker could leverage the memory corruption to gain elevated system privileges. According to ATT&CK framework, this vulnerability maps to T1059.007 (Command and Scripting Interpreter: JavaScript) and T1203 (Exploitation for Client Execution) techniques, as it enables remote code execution through browser-based attack vectors. The memory corruption occurs during the processing of malformed web content, particularly in how the browser handles object references and memory allocation for dynamic web elements. Attackers can craft specific HTML or JavaScript content that triggers the memory corruption when rendered by Internet Explorer 8, potentially leading to complete system compromise.
The technical exploitation of this vulnerability requires understanding of the browser's internal memory management and object model handling. When Internet Explorer 8 processes malicious content, it fails to properly validate memory boundaries during object manipulation, allowing attackers to overwrite critical memory locations. This memory corruption can be exploited to redirect execution flow, inject malicious code, or cause the browser to crash and potentially the entire system. The vulnerability's impact extends to both authenticated and unauthenticated attack scenarios, as it can be triggered through web-based attacks without requiring additional credentials or system access. Security researchers have identified that the flaw manifests most consistently when processing specific combinations of JavaScript objects and DOM elements that trigger memory allocation patterns inconsistent with normal browser behavior. The exploitation process typically involves crafting malicious web content that, when loaded in Internet Explorer 8, causes the browser to allocate memory in a way that allows the attacker to overwrite critical program structures or execute arbitrary code within the browser's memory space.
Organizations maintaining Internet Explorer 8 installations face significant operational risks from this vulnerability, particularly in environments where legacy applications require the older browser version. The lack of modern security features in IE8, combined with the presence of this memory corruption flaw, creates an environment where attackers can easily establish persistent access to affected systems. Mitigation strategies should prioritize immediate patching of affected systems, though this may not be feasible in environments with legacy application dependencies. Alternative approaches include implementing browser isolation techniques, deploying web application firewalls, and restricting access to potentially malicious websites through network-level controls. Security teams should also consider implementing user education programs to reduce the likelihood of successful social engineering attacks that could exploit this vulnerability. The vulnerability's classification as a memory corruption issue aligns with industry standards for identifying and categorizing browser-based exploits that can lead to complete system compromise. Organizations should also consider implementing monitoring solutions that can detect anomalous memory access patterns or execution flows that might indicate exploitation attempts. Regular security assessments and vulnerability scanning should include specific checks for IE8 installations that may be vulnerable to this memory corruption flaw, as the risk remains significant for enterprises that have not migrated to supported browser versions. The vulnerability's persistence in older browser versions demonstrates the importance of maintaining up-to-date security patches and implementing robust application lifecycle management practices that include regular security assessments and remediation activities.