CVE-2006-0009 in Office
Summary
by MITRE
Buffer overflow in Microsoft Office 2000 SP3, XP SP3, and other versions and packages, allows user-assisted attackers to execute arbitrary code via a routing slip that is longer than specified by the provided length field, as exploited by malware such as TROJ_MDROPPER.BH and Trojan.PPDropper.E in attacks against PowerPoint.
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Analysis
by VulDB Data Team • 01/19/2025
This vulnerability represents a classic buffer overflow flaw that affects Microsoft Office applications including Office 2000 SP3 and XP SP3 versions. The vulnerability occurs within the PowerPoint application's handling of routing slip data structures where the software fails to properly validate the length field before processing the associated data. When an attacker crafts a malicious routing slip with a length field that exceeds the actual data size, the application's memory management routines become compromised, creating an exploitable condition that allows arbitrary code execution. The vulnerability specifically targets the PowerPoint application's internal buffer management mechanisms, where insufficient bounds checking permits data to overflow into adjacent memory regions, potentially overwriting critical program structures or executable code.
The attack vector requires user interaction as the malicious file must be opened by an unsuspecting victim, making this a user-assisted exploit rather than a fully automated attack. This characteristic aligns with common attack patterns documented in the mitre attack framework where initial access often requires social engineering or phishing techniques to convince users to open malicious documents. The exploitation technique leverages the inherent memory safety issues in the Office application's implementation, where the routing slip feature does not properly validate the relationship between the declared data length and the actual data payload. This type of vulnerability is categorized under CWE-121 as a stack-based buffer overflow, which represents a well-known and frequently exploited class of memory corruption vulnerabilities.
The operational impact of this vulnerability extends beyond simple code execution to potentially enable complete system compromise when combined with other attack techniques. Malware families such as TROJ_MDROPPER.BH and Trojan.PPDropper.E have specifically targeted this vulnerability to establish persistent access to infected systems, often employing the buffer overflow as an initial foothold for more sophisticated attacks. The vulnerability's presence in widely deployed Office versions means that successful exploitation could affect numerous enterprise environments where PowerPoint documents are commonly shared and opened. Organizations with legacy Office installations remain particularly vulnerable, as these older versions may not have received the necessary security patches or updates that would address the underlying memory management flaws.
Mitigation strategies for this vulnerability should focus on multiple defensive layers including immediate patch deployment for affected Office versions, implementation of strict document validation policies, and user education regarding suspicious document attachments. The recommended approach involves applying Microsoft's security updates that address the specific buffer overflow conditions in the routing slip handling code, while also implementing application whitelisting controls that restrict execution of untrusted Office documents. Network-based defenses such as email filtering and web proxy configurations can help prevent initial delivery of malicious documents, though the user-assisted nature of the attack means that comprehensive security awareness training remains essential. Organizations should also consider implementing runtime protections such as data execution prevention and address space layout randomization to make exploitation more difficult even if the underlying vulnerability remains unpatched. The vulnerability demonstrates the critical importance of maintaining up-to-date software security patches and the potential consequences of running unsupported legacy software versions in enterprise environments.