SUSE: CVE-2023-22745: SUSE Linux Security Advisory

SUSE: CVE-2023-22745: SUSE Linux Security Advisory

Severity

6

CVSS

(AV:L/AC:M/Au:M/C:C/I:C/A:C)

Published

01/19/2023

Created

03/01/2023

Added

02/28/2023

Modified

01/28/2025

Description

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.

Solution(s)

• suse-upgrade-libtss2-esys0
• suse-upgrade-libtss2-esys0-32bit
• suse-upgrade-libtss2-fapi0
• suse-upgrade-libtss2-fapi1
• suse-upgrade-libtss2-fapi1-32bit
• suse-upgrade-libtss2-mu0
• suse-upgrade-libtss2-mu0-32bit
• suse-upgrade-libtss2-rc0
• suse-upgrade-libtss2-rc0-32bit
• suse-upgrade-libtss2-sys0
• suse-upgrade-libtss2-sys0-32bit
• suse-upgrade-libtss2-sys1
• suse-upgrade-libtss2-sys1-32bit
• suse-upgrade-libtss2-tcti-cmd0
• suse-upgrade-libtss2-tcti-cmd0-32bit
• suse-upgrade-libtss2-tcti-device0
• suse-upgrade-libtss2-tcti-device0-32bit
• suse-upgrade-libtss2-tcti-mssim0
• suse-upgrade-libtss2-tcti-mssim0-32bit
• suse-upgrade-libtss2-tcti-pcap0
• suse-upgrade-libtss2-tcti-swtpm0
• suse-upgrade-libtss2-tcti-swtpm0-32bit
• suse-upgrade-libtss2-tctildr0
• suse-upgrade-libtss2-tctildr0-32bit
• suse-upgrade-tpm2-0-tss
• suse-upgrade-tpm2-0-tss-devel

References

• https://attackerkb.com/topics/cve-2023-22745
• CVE - 2023-22745