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CVE-2016-3955 is a vulnerability in the Linux kernel's USB/IP subsystem, specifically in the usbip_recv_xbuff function within drivers/usb/usbip/usbip_common.c, present in kernel versions before 4.5.3. The flaw arises from improper validation of a length value in a USB/IP packet, which can lead to an out-of-bounds write. A remote attacker can exploit this by sending a specially crafted USB/IP packet, potentially causing a denial of service or enabling further exploitation such as arbitrary code execution.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (PoC) exploit for CVE-2016-3955, a heap buffer overflow vulnerability in the Linux USB/IP subsystem. The code is written in Go and implements a demo USB/IP server that listens on localhost TCP port 3240. When a USB/IP client connects and initiates device import, the server sends crafted protocol responses, including a device list and import response with fake device information. The core exploit occurs when the server responds to a USBIP_CMD_SUBMIT request by sending more data than the client expects (using the OVERFLOW_SIZE constant), thereby triggering a heap buffer overflow in the client. The repository consists of a main entry point (cmd/uboatsrv/main.go), the server implementation (uboatsrv.go), and the USB/IP protocol logic (usbip_protocol.go). The README provides build instructions and background. No detection or fake code is present; the code is a functional PoC for the specified vulnerability.
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