Skip to content
Fencer Vulns
medium 4.3

CVE-2024-29040 json

Fapi Verify Quote: Does not detect if quote was not generated by TPM

published 2024-06-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-26089

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

This repository hosts source code implementing the Trusted Computing Group's (TCG) TPM2 Software Stack (TSS). The JSON Quote Info returned by Fapi_Quote has to be deserialized by Fapi_VerifyQuote to the TPM Structure `TPMS_ATTEST`. For the field `TPM2_GENERATED magic` of this structure any number can be used in the JSON structure. The verifier can receive a state which does not represent the actual, possibly malicious state of the device under test. The malicious device might get access to data it shouldn't, or can use services it shouldn't be able to. This issue has been patched in version 4.1.0.

Patch / fix

  • tpm2_software_stack_project tpm2_software_stack 4.1.0
  • tpm2-tss Debian 14, Debian 13 4.1.0-1

debian advisories DEBIAN-CVE-2024-29040

  • tpm2-tss Ubuntu 22.04 LTS 3.2.0-1ubuntu1.1
  • tpm2-tss Ubuntu 24.04 LTS 4.0.1-7.1ubuntu5.1

ubuntu advisories UBUNTU-CVE-2024-29040

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tpm2-0-tss Linux Micro 6.0 4.1.0-1.1
  • efivar Linux Micro 6.0 38-3.1
  • tpm2.0-tools Linux Micro 6.0 5.7-1.1
  • tpm2-0-tss SLE Module for Basesystem 15 SP5, SLE Micro 5.5, SLE Micro 5.4 +4 more 3.1.0-150400.3.6.1

suse advisories SUSE-SU-2025:20151-1SUSE-SU-2024:1635-2SUSE-SU-2024:1635-1

  • tpm2-tss Alpine 3.19 4.0.2-r0
  • tpm2-tss Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 4.1.1-r0

alpine advisories ALPINE-CVE-2024-29040

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tpm2-tss Azure Linux 3.0 4.0.2-1
  • tpm2-tss CBL-Mariner 2.0 2.4.6-4

azure linux advisories AZL-42978AZL-42985

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-29040 updated cvss 4.4

tpm2-tss: arbitrary quote data may go undetected by Fapi_VerifyQuote

  • Red Hat Enterprise Linux 7 tpm2-tss, tpm2-tss-utils
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 tpm2-tss
    affected: no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Enterprise Linux 8 tpm2-tss Red Hat Enterprise Linux 10 tpm2-tss
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected products

  • tpm2-software tpm2-tss
  • tpm2_software_stack_project tpm2_software_stack

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.