Trusted Computing Group’s Trust Platform Module 2.0 reference library specification has been discovered with two buffer overflow vulnerabilities that threat actors can exploit to access read-only sensitive data or overwrite normally protected data, which is only available to the TPM.

A malicious individual who has gained access to the TPM 2.0’s Command interface has the capability to take advantage of this vulnerability by sending specifically crafted commands to the module.

As a result, they can cause harm by exploiting these vulnerabilities.

The Trusted Computing Group (TCG) has released a security advisory for users to mitigate and patch these vulnerabilities. 

CVE-2023-1017: Out-of-Bounds Write Vulnerability

This vulnerability exists in the TPM2.0’s Module Library, which could allow a threat actor to write 2-byte data beyond the end of TPM2.0 command in the CryptParameterDecryption routine.

Successful exploitation of this vulnerability can lead to denial of service or arbitrary code execution.

The severity of this vulnerability has been given as 7.8 (High).

CVE-2023-1018: Out-of-Bounds read vulnerability

This vulnerability exists in the TPM2.0’s Module Library, which could allow a threat actor to read 2-byte data beyond the end of TPM2.0 command in the CryptParameterDecryption routine.

Successful exploitation of this vulnerability can allow a threat actor to read or access sensitive data.

The severity of this vulnerability has been given as 5.5 (Medium).

Affected Vendors Products

Some of the Product Vendors affected by these vulnerabilities include libtpms IBM sponsored, NetBSD, NixOS, Red Hat, Squid, SUSE Linux, and Trusted Computing Group.

However, these vendors have released security patches to address these vulnerabilities.

Users of these products and vendors should upgrade to the latest versions to prevent these vulnerabilities from getting exploited.

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