ALT-PU-2023-1288-2

Package update tpm2-tss in branch sisyphus

Version4.0.1-alt1

Published2026-02-04

Max severityMEDIUM

Severity:

Closed issues (2)

MEDIUM6.4

Уязвимость функций Tss2_RC_Decode и Tss2_RC_SetHandler реализации TCG TPM2 TPM2 Software Stack, позволяющая нарушителю получить доступ к конфиденциальным данным, нарушить их целостность, а также вызвать отказ в обслуживании

Published: 2023-11-11Modified: 2024-06-13

CVSS 3.xMEDIUM 6.4

CVSS:3.x/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 5.9

CVSS:2.0/AV:L/AC:H/Au:M/C:C/I:C/A:C

References

CVE-2023-22745

MEDIUM6.4

tpm2-tss is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2). In versions prior to 4.1.0-rc0, 4.0.1, and 3.2.2-rc1, `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. Versions 4.1.0-rc0, 4.0.1, and 3.2.2-rc1 fix the issue.

Published: 2023-01-19Modified: 2025-11-21

CVSS 3.xMEDIUM 6.4

CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References