CVE-2009-0226 in PowerPoint
Summary
by MITRE
Stack-based buffer overflow in the PowerPoint 4.2 conversion filter in Microsoft Office PowerPoint 2000 SP3, 2002 SP3, and 2003 SP3 allows remote attackers to execute arbitrary code via a long string in sound data in a file that uses a PowerPoint 4.0 native file format, leading to memory corruption, aka "Legacy File Format Vulnerability," a different vulnerability than CVE-2009-0222, CVE-2009-0223, CVE-2009-0227, and CVE-2009-1137.
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Analysis
by VulDB Data Team • 08/11/2021
The vulnerability identified as CVE-2009-0226 represents a critical stack-based buffer overflow flaw within Microsoft Office PowerPoint's legacy file format handling capabilities. This vulnerability specifically affects PowerPoint 2000 SP3, 2002 SP3, and 2003 SP3 versions, exposing systems to potential remote code execution attacks through malformed PowerPoint 4.0 native file format files. The flaw manifests when the application processes sound data within these legacy files, particularly when encountering excessively long string data that exceeds the allocated buffer space on the stack. This vulnerability falls under the CWE-121 stack-based buffer overflow category, which is classified as a fundamental memory safety issue that has been consistently identified as a primary attack vector in software security assessments. The vulnerability is distinct from several other related issues including CVE-2009-0222, CVE-2009-0223, CVE-2009-0227, and CVE-2009-1137, indicating a specific code path within the PowerPoint conversion filter that warrants targeted remediation efforts.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious PowerPoint 4.0 file containing oversized string data within the sound data section of the file format. When a victim opens such a file using the affected PowerPoint versions, the application's conversion filter attempts to process the malformed sound data, causing a buffer overflow that corrupts adjacent memory locations on the stack. This memory corruption can overwrite critical program execution data including return addresses, function pointers, or other control flow information, enabling attackers to redirect program execution to malicious code injected into the buffer space. The attack vector is particularly insidious because it requires no special privileges or user interaction beyond opening the malicious file, making it a prime candidate for phishing campaigns and social engineering attacks. From an ATT&CK framework perspective, this vulnerability maps to T1203 (Exploitation for Client Execution) and T1059 (Command and Scripting Interpreter) as attackers can leverage the overflow to execute arbitrary code within the context of the PowerPoint application process.
The operational impact of CVE-2009-0226 extends beyond immediate code execution capabilities to encompass broader system compromise and data theft risks. Organizations running affected PowerPoint versions face significant exposure when users encounter malicious files through email attachments, web downloads, or removable media, as the vulnerability can be exploited without user awareness or explicit interaction beyond document opening. The memory corruption resulting from this buffer overflow can lead to application crashes, system instability, and potential privilege escalation opportunities depending on the execution context. Security professionals must consider that legacy PowerPoint installations often persist in enterprise environments due to compatibility requirements, making this vulnerability particularly dangerous for organizations with extended support cycles. The vulnerability also demonstrates the persistent risks associated with maintaining legacy software components, as older file format parsers often contain unpatched security flaws that remain exploitable years after their initial discovery. Remediation efforts should prioritize immediate patch deployment through Microsoft's security updates, alongside user education about avoiding untrusted PowerPoint files and implementing application whitelisting policies to prevent execution of potentially malicious documents.
The broader implications of this vulnerability highlight the importance of maintaining up-to-date software security practices and the challenges of managing legacy system components in enterprise environments. Organizations should implement comprehensive vulnerability management programs that include regular assessment of legacy software components, particularly those handling file format parsing and conversion functions. The vulnerability also underscores the need for defense-in-depth strategies that combine multiple security controls including email filtering, endpoint protection, and network monitoring to detect and prevent exploitation attempts. Security teams must recognize that vulnerabilities like CVE-2009-0226 often serve as initial access points for more sophisticated attacks, emphasizing the critical importance of timely patch management and proactive threat hunting activities. The technical characteristics of this vulnerability align with common exploitation patterns documented in security research, making it a valuable case study for understanding how legacy software vulnerabilities can remain relevant and dangerous long after their initial disclosure.