rndis_host USB Buffer Overflow in Linux Kernel

Executive Summary

This is a vulnerability in the Linux kernel related to the rndis_host driver. It involves an overflow check missing in the rndis_rx_fixup function. The issue allows data_offset + data_len + 8 to wrap around, potentially causing an out-of-bounds (OOB) read of the USB data buffer.

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Detection Guidance

This vulnerability is specific to the Linux kernel's rndis_host driver and involves an overflow check in the rndis_rx_fixup function. Detection requires checking the kernel version and examining the driver code for the overflow condition. Use commands like 'uname -a' to check the kernel version and 'modinfo rndis_host' to inspect the module. If the kernel is older than the patched version, the system may be vulnerable.

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Impact Analysis

This vulnerability could allow an attacker to read memory outside the intended buffer in the Linux kernel. This might lead to information disclosure, system crashes, or privilege escalation if exploited. Systems using vulnerable Linux kernel versions with the rndis_host driver are at risk.

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Mitigation Strategies

Update your Linux kernel to the latest patched version to address the rndis_host overflow issue. Monitor vendor advisories for kernel updates and apply them promptly.

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