CVE-2010-1083 in Linux
Summary
by MITRE
The processcompl_compat function in drivers/usb/core/devio.c in Linux kernel 2.6.x through 2.6.32, and possibly other versions, does not clear the transfer buffer before returning to userspace when a USB command fails, which might make it easier for physically proximate attackers to obtain sensitive information (kernel memory).
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Analysis
by VulDB Data Team • 03/22/2025
The vulnerability identified as CVE-2010-1083 resides within the Linux kernel's USB subsystem, specifically in the processcompl_compat function located in drivers/usb/core/devio.c. This flaw affects kernel versions 2.6.x through 2.6.32 and potentially other versions in the same series, representing a significant security concern that could be exploited by adversaries with physical proximity to affected systems. The vulnerability stems from improper memory handling during USB command processing, where sensitive kernel memory contents are inadvertently exposed to userspace applications through the USB transfer buffer.
The technical flaw manifests when USB commands fail during execution, as the processcompl_compat function fails to properly clear the transfer buffer before returning control to userspace. This memory clearance omission creates a potential information disclosure scenario where remnants of kernel memory, including potentially sensitive data such as cryptographic keys, passwords, or other confidential information, remain accessible to user-level processes. The vulnerability is particularly concerning because it operates at the kernel level, where memory corruption and information leakage can have far-reaching consequences for system security and data integrity.
From an operational perspective, this vulnerability creates a significant risk for systems where physical proximity attacks are possible, such as in public environments, shared workspaces, or locations where unauthorized individuals might gain access to computing devices. The attack vector requires only physical access to the device, making it particularly dangerous for mobile computing devices, embedded systems, or any platform where the device might be left unattended. The potential impact includes unauthorized access to kernel memory contents that could contain sensitive information, potentially leading to privilege escalation, credential theft, or other advanced persistent threats that leverage the leaked information for further exploitation.
This vulnerability maps to CWE-200, which addresses "Information Exposure," and aligns with ATT&CK technique T1005, "Data from Local System," as it enables attackers to extract sensitive information from kernel memory through USB interfaces. The flaw represents a classic case of improper information handling where the kernel fails to sanitize memory before exposing it to user-space processes. Mitigation strategies include applying the appropriate kernel security patches that ensure proper buffer clearing before USB command completion, implementing physical security measures to prevent unauthorized access, and conducting regular security assessments to identify similar memory handling vulnerabilities. Organizations should prioritize updating their kernel versions to patched releases, as the vulnerability affects a core kernel component that is essential for USB device functionality across numerous computing platforms and embedded systems.