CVE-2008-3636 in iTunes
Summary
by MITRE
Integer overflow in the IopfCompleteRequest API in the kernel in Microsoft Windows 2000, XP, Server 2003, and Vista allows context-dependent attackers to gain privileges. NOTE: this issue was originally reported for GEARAspiWDM.sys 2.0.7.5 in Gear Software CD DVD Filter driver before 4.001.7, as used in other products including Apple iTunes and multiple Symantec and Norton products, which allows local users to gain privileges via repeated IoAttachDevice IOCTL calls to \\.\GEARAspiWDMDevice in this GEARAspiWDM.sys. However, the root cause is the integer overflow in the API call itself.
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Analysis
by VulDB Data Team • 05/26/2025
The vulnerability described in CVE-2008-3636 represents a critical integer overflow flaw within the Windows kernel's IopfCompleteRequest API implementation. This issue affects multiple Windows operating systems including Windows 2000, XP, Server 2003, and Vista, creating a persistent security weakness that can be exploited by context-dependent attackers to escalate privileges. The vulnerability stems from improper handling of integer values within the kernel-level API, specifically when processing device attachment requests through the IoAttachDevice IOCTL mechanism. The flaw manifests when repeated IOCTL calls are made to the \.\GEARAspiWDMDevice device interface, which serves as the entry point for exploitation.
The technical root cause of this vulnerability aligns with CWE-190, which identifies integer overflow conditions as a fundamental class of software defects that can lead to arbitrary code execution. When the IopfCompleteRequest API processes device attachment requests, it fails to properly validate or clamp integer values, allowing an attacker to manipulate input parameters that eventually trigger an overflow condition. This overflow corrupts memory structures within the kernel space, creating opportunities for privilege escalation attacks. The specific exploitation pathway involves repeated calls to the GEARAspiWDM.sys driver, which acts as an intermediary between user-mode applications and kernel-level device operations. The vulnerability demonstrates the classic pattern of kernel-mode buffer overflow exploitation where attackers can manipulate integer arithmetic to bypass normal memory boundaries.
The operational impact of this vulnerability extends beyond the specific GEARAspiWDM.sys driver mentioned in the original report, as it represents a fundamental flaw in Windows kernel APIs that affects numerous software products. This includes Apple iTunes and various Symantec and Norton security products that incorporate the vulnerable driver component, creating a widespread attack surface. Local users can exploit this vulnerability to gain elevated privileges, potentially allowing them to execute arbitrary code with system-level rights. The attack requires local access and specific conditions involving repeated IOCTL calls, making it less suitable for remote exploitation but still highly dangerous in local compromise scenarios. The vulnerability's persistence across multiple Windows versions indicates a systemic issue within the kernel's privilege handling mechanisms.
Mitigation strategies for CVE-2008-3636 should focus on both immediate patching and architectural defenses. Microsoft released security updates that addressed the integer overflow in the kernel API, and organizations should ensure these patches are deployed across all affected systems. Additionally, system administrators should implement privilege separation measures and monitor for unusual IOCTL activity patterns that might indicate exploitation attempts. The vulnerability's classification under ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation," highlights the need for defensive measures such as application whitelisting and kernel-mode protection mechanisms. Network segmentation and least privilege principles should be enforced to limit the potential impact of successful exploitation, while regular security assessments can help identify systems that may still be vulnerable due to incomplete patching or legacy software dependencies.