CVE-2011-0028 in Windows
Summary
by MITRE
WordPad in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly parse fields in Word documents, which allows remote attackers to execute arbitrary code via a crafted .doc file, aka "WordPad Converter Parsing Vulnerability."
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Analysis
by VulDB Data Team • 01/20/2025
The vulnerability identified as CVE-2011-0028 represents a critical security flaw in Microsoft WordPad applications running on Windows XP Service Pack 2 and 3, as well as Windows Server 2003 Service Pack 2 systems. This weakness stems from improper handling of field parsing within Microsoft Word documents, creating an exploitable condition that enables remote code execution through maliciously crafted .doc files. The vulnerability specifically affects the WordPad converter component that processes document fields, making it a target for attackers seeking to leverage document processing capabilities for unauthorized system compromise.
The technical root cause of this vulnerability lies in the insufficient validation and parsing mechanisms implemented within WordPad's document field processing engine. When WordPad encounters a specially crafted Word document containing malformed or malicious field structures, the application fails to properly validate the field data before attempting to process it. This inadequate input sanitization creates a path for attackers to inject malicious code that executes with the privileges of the user running WordPad. The vulnerability is classified as a buffer overflow or parsing error that occurs during field interpretation, allowing attackers to manipulate the execution flow of the application through carefully constructed document elements.
From an operational perspective, this vulnerability presents significant risks to organizations utilizing legacy Windows systems that have not been properly updated. Attackers can leverage this weakness by delivering malicious Word documents through various attack vectors including email attachments, web downloads, or compromised websites. The remote execution capability means that successful exploitation can occur without requiring local system access, making it particularly dangerous in enterprise environments where users may open documents from untrusted sources. The vulnerability affects systems where WordPad is the default application for opening .doc files, which was common in older Windows deployments.
The exploitation of CVE-2011-0028 aligns with several tactics described in the attack framework, particularly those involving initial access through malicious document attachments and privilege escalation through application exploitation. This vulnerability demonstrates the importance of maintaining up-to-date security patches and the risks associated with running unsupported operating systems. Organizations should consider implementing email filtering solutions, document validation policies, and user education programs to mitigate the risk of exploitation. The vulnerability also highlights the need for proper input validation and secure coding practices in application development, particularly in components that process untrusted data from external sources.
Security professionals should note that this vulnerability represents a classic example of how legacy applications can contain exploitable code that remains relevant long after initial discovery. The weakness in field parsing mechanisms creates a persistent threat vector that requires immediate remediation through proper patch management procedures. Microsoft addressed this vulnerability through security updates that improved field validation and parsing logic within WordPad, emphasizing the importance of timely security patch deployment. Organizations should also consider implementing network segmentation and application whitelisting policies to limit the potential impact of such vulnerabilities in their environments. The vulnerability serves as a reminder of the critical importance of maintaining current security postures and the dangers of relying on outdated software systems that no longer receive security updates.