CVE-2008-0951 in Windows
Summary
by MITRE
Microsoft Windows Vista does not properly enforce the NoDriveTypeAutoRun registry value, which allows user-assisted remote attackers, and possibly physically proximate attackers, to execute arbitrary code by inserting a (1) CD-ROM device or (2) U3-enabled USB device containing a filesystem with an Autorun.inf file, and possibly other vectors related to (a) AutoRun and (b) AutoPlay actions.
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Analysis
by VulDB Data Team • 01/05/2025
The vulnerability described in CVE-2008-0951 represents a critical security flaw in Microsoft Windows Vista operating system related to the improper enforcement of the NoDriveTypeAutoRun registry value. This weakness specifically affects the AutoRun and AutoPlay functionality that automatically executes commands when removable media devices are connected to a system. The vulnerability exists in the Windows Vista operating system's handling of removable storage devices, particularly those that support the AutoRun feature. The flaw allows malicious actors to bypass the intended security controls that should prevent automatic execution of code from removable media. This issue is particularly concerning because it can be exploited through common user interactions with removable storage devices, making it accessible to both remote attackers and those with physical proximity to target systems.
The technical implementation of this vulnerability stems from Windows Vista's failure to properly validate and enforce the NoDriveTypeAutoRun registry value, which is designed to control which types of drives should automatically execute autorun commands. When a CD-ROM or U3-enabled USB device containing a malicious Autorun.inf file is inserted into a vulnerable system, the operating system's AutoPlay service processes the device according to the AutoRun configuration, potentially executing malicious code without proper user consent or security validation. The vulnerability specifically affects devices that support AutoRun functionality, including CD-ROM drives and USB storage devices with U3 technology, which is a proprietary format that extends USB storage capabilities. The flaw allows attackers to leverage the normal AutoRun behavior to execute arbitrary code, effectively bypassing the intended security restrictions that should prevent automatic execution of potentially malicious content from removable media.
The operational impact of this vulnerability is significant and multifaceted, as it creates multiple attack vectors for code execution without requiring elevated privileges or sophisticated exploitation techniques. Attackers can exploit this vulnerability through simple physical proximity attacks or remote delivery methods, making it particularly dangerous in environments where removable media is frequently used. The vulnerability affects systems that have AutoPlay enabled by default, which is common in most Windows Vista installations. When a malicious device is inserted, the system automatically attempts to execute commands defined in the Autorun.inf file, potentially leading to malware installation, privilege escalation, or other malicious activities. This vulnerability directly relates to the concept of privilege escalation through automated execution, as it allows attackers to gain system-level access through seemingly innocuous user interactions with removable storage devices. The attack surface is broad since any system with AutoPlay enabled and vulnerable to AutoRun execution is potentially at risk, affecting both enterprise and individual users.
Security professionals should implement multiple layers of defense to mitigate this vulnerability, including disabling AutoRun functionality through registry modifications or group policies, ensuring that the NoDriveTypeAutoRun registry value is properly configured to prevent automatic execution from removable media, and educating users about the risks of inserting unknown or untrusted removable storage devices. The mitigation strategy should include configuring the registry value to disable AutoRun for specific drive types, particularly CD-ROM and USB drives, and implementing strict access controls for removable storage devices. Organizations should also consider disabling AutoPlay entirely through Group Policy settings to prevent automatic execution of content from removable media. This vulnerability aligns with several ATT&CK framework techniques including T1059 for command and scripting interpreter, T1204 for user execution, and T1068 for exploit for privilege escalation. The vulnerability also maps to CWE-787 which describes out-of-bounds write conditions, as the improper handling of AutoRun functionality can lead to memory corruption and arbitrary code execution. System administrators should monitor for suspicious AutoRun activity and ensure that all systems are updated with the latest security patches from Microsoft to address this vulnerability. Additionally, endpoint protection solutions should be configured to detect and block suspicious AutoRun activities from removable devices, and regular security assessments should be performed to verify that systems are properly configured to prevent exploitation of this vulnerability.