NA

CVE-2023-22745

Published: 19/01/2023 Updated: 26/01/2023
CVSS v3 Base Score: 6.4 | Impact Score: 5.9 | Exploitability Score: 0.5
VMScore: 0

Vulnerability Summary

tpm2-tss is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2). In affected versions `Tss2_RC_SetHandler` and `Tss2_RC_Decode` both index into `layer_handler` with an 8 bit layer number, but the array only has `TPM2_ERROR_TSS2_RC_LAYER_COUNT` entries, so trying to add a handler for higher-numbered layers or decode a response code with such a layer number reads/writes past the end of the buffer. This Buffer overrun, could result in arbitrary code execution. An example attack would be a MiTM bus attack that returns 0xFFFFFFFF for the RC. Given the common use case of TPM modules an attacker must have local access to the target machine with local system privileges which allows access to the TPM system. Usually TPM access requires administrative privilege.

Vulnerability Trend

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tpm2 software stack project tpm2 software stack

Vendor Advisories

Debian Bug report logs - #1029369 tpm2-tss: CVE-2023-22745 Package: src:tpm2-tss; Maintainer for src:tpm2-tss is Mathieu Trudel-Lapierre <cyphermox@ubuntucom>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Sat, 21 Jan 2023 21:33:00 UTC Severity: normal Tags: security, upstream Found in version tpm2-ts ...
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DescriptionThe MITRE CVE dictionary describes this issue as: tpm2-tss is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2) In affected versions `Tss2_RC_SetHandler` and `Tss2_RC_Decode` both index into `layer_handler` with an 8 bit layer number, but the array only has ...