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CVE-2021-1656 is an information disclosure vulnerability in the TPM Device Driver on Windows systems. The vulnerability allows an attacker to obtain sensitive information from the TPM device driver due to improper handling of data within the driver. The specific details of the vulnerable function or code path are not provided, but exploitation could allow an attacker to access information that should be protected by the TPM.
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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-2021-1656, an information disclosure vulnerability in the Microsoft Windows tpm.sys driver. The main code is implemented in C++ and consists of a Visual Studio project with the primary logic in 'TPM_Disclosure/TPM_Disclosure.cpp'. The exploit works by opening the symbolic link '\GLOBAL??\TPM' using native Windows API calls (ZwOpenSymbolicLinkObject and ZwQuerySymbolicLinkObject) to retrieve and display the target of the TPM device symbolic link. The output is printed in hexadecimal format using helper functions from 'DumpHex.cpp'. The exploit demonstrates the ability to disclose information about the TPM device mapping, which could be leveraged for further attacks or information gathering. The repository is structured as a standard Visual Studio C++ console application project, with supporting files for project configuration and build. No network or remote attack vectors are present; the exploit must be run locally on a vulnerable Windows system.
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