CVE-2009-3671 in Windows
Summary
by MITRE
Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, aka "Uninitialized Memory Corruption Vulnerability," a different vulnerability than CVE-2009-3674.
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Analysis
by VulDB Data Team • 10/21/2024
This vulnerability represents a critical memory corruption flaw in Microsoft Internet Explorer 8 that stems from improper handling of objects in memory during the browser's operation. The vulnerability specifically affects how IE8 manages object lifecycle within its memory management system, creating conditions where attackers can exploit uninitialized or already deleted memory objects to gain arbitrary code execution privileges. The flaw manifests when the browser encounters objects that either failed to initialize properly during creation or have been prematurely deallocated from memory but are still being referenced or accessed by malicious code. This type of vulnerability falls under the CWE-476 category of NULL Pointer Dereference, though it operates through a more complex memory corruption mechanism that enables remote code execution rather than simple application crash.
The operational impact of this vulnerability extends beyond typical browser exploitation scenarios, as it allows remote attackers to execute arbitrary code on vulnerable systems with the privileges of the user running Internet Explorer. Attackers can craft malicious web pages that trigger the memory corruption conditions when the browser processes specific JavaScript or HTML elements, leading to potential system compromise, data theft, or further attack vector establishment. The vulnerability's remote exploitability means that users need only visit a compromised website or click on malicious links to be affected, making it particularly dangerous in phishing campaigns or drive-by download scenarios. This weakness directly maps to attack techniques described in the MITRE ATT&CK framework under T1203 - Exploitation for Client Execution and T1059 - Command and Scripting Interpreter, where attackers leverage browser vulnerabilities to establish persistent access to target systems.
The technical nature of this vulnerability demonstrates the inherent complexity of modern web browser security architectures and highlights the challenges of memory management in dynamic scripting environments. When Internet Explorer 8 encounters improperly initialized objects or attempts to access deleted memory locations, the resulting memory corruption can be leveraged to overwrite critical program execution pointers or inject malicious code into the browser's memory space. The vulnerability's classification as an uninitialized memory corruption issue indicates that the browser's memory management routines fail to properly validate object states before execution, creating opportunities for attackers to manipulate memory contents and redirect program flow. Microsoft's security advisory for this vulnerability emphasizes that the flaw exists in the browser's scripting engine, specifically affecting how it handles JavaScript objects and memory allocation during page rendering and script execution phases. Organizations affected by this vulnerability should implement immediate mitigations including browser updates, security policy enforcement, and network-level protections to prevent exploitation attempts. The vulnerability also underscores the importance of proper memory management practices and input validation in software development, aligning with security standards that emphasize defensive programming techniques to prevent similar memory corruption issues in future implementations.