CVE-2007-3891 in Windows
Summary
by MITRE
Unspecified vulnerability in Windows Vista Weather Gadgets in Windows Vista allows remote attackers to execute arbitrary code via crafted HTML attributes.
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Analysis
by VulDB Data Team • 01/05/2025
The vulnerability identified as CVE-2007-3891 represents a critical security flaw within the Windows Vista Weather Gadgets component that operates within the Windows Vista operating system. This vulnerability specifically affects the handling of HTML attributes within weather gadget implementations, creating a potential attack vector that could be exploited by remote threat actors. The issue stems from insufficient input validation and sanitization mechanisms that fail to properly process crafted HTML attributes, allowing malicious code execution to occur through seemingly benign web content. The affected system components operate with elevated privileges due to their integration within the Windows Vista ecosystem, making the potential impact significantly more severe than typical web-based vulnerabilities.
This vulnerability manifests as a code execution flaw that operates through the gadget framework's processing of HTML content, which falls under the CWE-79 category of Cross-Site Scripting vulnerabilities. The attack occurs when the weather gadget parses HTML attributes that contain malicious payloads, particularly targeting the way the system handles user-provided content within its graphical interface components. The flaw operates at the application layer of the OSI model, specifically within the presentation layer where user interfaces are rendered and processed. The vulnerability's remote exploitation capability means that attackers do not require local system access or physical presence to compromise affected systems, making it particularly dangerous in enterprise environments where users may encounter malicious web content through various channels.
The operational impact of CVE-2007-3891 extends beyond simple code execution, as it provides attackers with the ability to gain unauthorized access to system resources and potentially escalate privileges within the Windows Vista environment. The weather gadgets operate within a trusted execution context that typically has access to system resources and user data, creating a significant risk when exploited. Attackers could leverage this vulnerability to install malware, steal sensitive information, or establish persistent access points within the compromised system. The vulnerability's exploitation could lead to complete system compromise, particularly when combined with other attack vectors that might be present within the network environment. This makes the vulnerability particularly concerning from a threat intelligence perspective as it represents a potential entry point for more sophisticated attacks.
Mitigation strategies for CVE-2007-3891 should focus on both immediate defensive measures and long-term system hardening approaches. System administrators should implement network-level restrictions that prevent access to potentially malicious websites or content that could contain crafted HTML attributes designed to exploit this vulnerability. The recommended approach includes disabling or removing weather gadgets from systems where they are not essential, as well as implementing robust input validation mechanisms that filter out potentially malicious HTML content. Additionally, organizations should consider implementing application whitelisting policies that restrict which applications can execute within the Windows Vista environment, particularly those that handle user-provided content. The vulnerability's characteristics align with ATT&CK technique T1059.007 for Windows Command Shell execution, and T1068 for Local Privilege Escalation, making comprehensive monitoring and detection strategies essential for identifying potential exploitation attempts. Security patches and updates from Microsoft should be applied immediately to address the underlying flaw in the gadget processing mechanism, while also ensuring that system monitoring tools are configured to detect anomalous behavior that might indicate exploitation attempts.