CVE-2005-0044 in Exchange Server
Summary
by MITRE
The OLE component in Windows 98, 2000, XP, and Server 2003, and Exchange Server 5.0 through 2003, does not properly validate the lengths of messages for certain OLE data, which allows remote attackers to execute arbitrary code, aka the "Input Validation Vulnerability."
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Analysis
by VulDB Data Team • 01/03/2025
The vulnerability identified as CVE-2005-0044 represents a critical input validation flaw within the Object Linking and Embedding OLE component of multiple Microsoft Windows operating systems and Exchange Server versions. This weakness specifically affects Windows 98, 2000, XP, and Server 2003, alongside Exchange Server 5.0 through 2003, creating a widespread attack surface that has significant implications for enterprise security infrastructure. The flaw resides in how the OLE component processes message lengths during data handling operations, fundamentally undermining the integrity of the system's input validation mechanisms.
The technical implementation of this vulnerability stems from inadequate bounds checking within the OLE data processing routines. When the system receives OLE data streams, it fails to properly validate the length parameters associated with these data structures, allowing malicious actors to craft specially formatted payloads that exceed expected buffer sizes. This improper validation creates a condition where attacker-controlled data can overwrite adjacent memory locations, leading to arbitrary code execution privileges. The vulnerability operates at the kernel level within the Windows operating system, making it particularly dangerous as it can be exploited to gain elevated system privileges without user interaction.
The operational impact of CVE-2005-0044 extends beyond simple code execution capabilities, as it represents a fundamental weakness in Microsoft's security architecture that has persisted across multiple operating system generations. Attackers can leverage this vulnerability to install backdoors, modify system files, or completely compromise affected systems without requiring authentication. The widespread adoption of affected systems means that organizations running these legacy platforms face significant exposure, particularly in enterprise environments where Exchange Server installations remain operational. This vulnerability aligns with CWE-129, which specifically addresses improper validation of length parameters, and demonstrates how insufficient input validation can create pathways for privilege escalation and persistent system compromise.
The attack vectors for this vulnerability typically involve sending malicious OLE data through email messages or network protocols that utilize OLE components for data processing. The ATT&CK framework categorizes this as a privilege escalation technique through system binary modification, where attackers can manipulate system behavior by exploiting the underlying OLE validation flaws. Organizations should implement immediate mitigations including disabling OLE support in email clients, applying security patches, and implementing network segmentation to limit the potential impact of exploitation. The vulnerability highlights the importance of proper bounds checking in system components and demonstrates why input validation remains a critical security control in preventing remote code execution attacks.