CVE-2008-2254 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 6 and 7 accesses uninitialized memory, which allows remote attackers to cause a denial of service (crash) and execute arbitrary code via unknown vectors, aka "HTML Object Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 03/16/2021
The vulnerability identified as CVE-2008-2254 represents a critical memory corruption flaw in Microsoft Internet Explorer versions 6 and 7 that exposes the browser to remote exploitation through uninitialized memory access patterns. This issue falls under the CWE-457 category of "Use of Uninitialized Variable" and demonstrates how improper memory management can create severe security implications for web browsers. The vulnerability specifically affects the HTML object handling mechanisms within the browser's rendering engine, where the application fails to properly initialize memory structures before accessing them, creating a potential exploitation vector for malicious actors.
The technical exploitation of this vulnerability occurs when Internet Explorer encounters specially crafted HTML content that triggers memory corruption during object instantiation or manipulation. Attackers can leverage this flaw through various delivery mechanisms including malicious websites, email attachments, or compromised web pages that contain crafted HTML elements designed to trigger the uninitialized memory access. The vulnerability's impact extends beyond simple denial of service to enable arbitrary code execution, making it particularly dangerous for users who browse the internet without proper security measures. This memory corruption allows attackers to manipulate the browser's memory layout and potentially gain control over the executing process.
From an operational perspective, this vulnerability creates significant risk for organizations relying on older versions of Internet Explorer as it can be exploited remotely without user interaction in many scenarios. The attack surface is broad given that Internet Explorer was widely deployed across enterprise environments, and the vulnerability's exploitation capabilities make it attractive to threat actors seeking persistent access to target systems. Security professionals note that the vulnerability's exploitation often results in immediate browser crashes followed by potential code execution, making it difficult to distinguish between accidental crashes and malicious exploitation attempts. The flaw's presence in both IE6 and IE7 versions indicates that this was a fundamental architectural issue within the browser's object handling system.
Mitigation strategies for CVE-2008-2254 should prioritize immediate patch deployment for affected systems, as Microsoft released security updates to address the uninitialized memory access issue. Organizations should implement browser hardening measures including disabling unnecessary browser features, implementing application whitelisting policies, and deploying intrusion detection systems to monitor for exploitation attempts. The vulnerability's classification under ATT&CK technique T1203 - "Exploitation for Client Execution" emphasizes the need for network-based defenses and endpoint protection measures. Additionally, user education regarding safe browsing practices and the importance of keeping software updated remains critical in preventing exploitation, as this vulnerability demonstrates the importance of maintaining current security patches to protect against known memory corruption flaws that can be leveraged for remote code execution.