// For flags

CVE-2024-29039

Missing check in tpm2_checkquote allows attackers to misrepresent the TPM state

Severity Score

9.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

tpm2 is the source repository for the Trusted Platform Module (TPM2.0) tools. This vulnerability allows attackers to manipulate tpm2_checkquote outputs by altering the TPML_PCR_SELECTION in the PCR input file. As a result, digest values are incorrectly mapped to PCR slots and banks, providing a misleading picture of the TPM state. This issue has been patched in version 5.7.

tpm2 es el repositorio de origen de las herramientas del Módulo de plataforma segura (TPM2.0). Esta vulnerabilidad permite a los atacantes manipular las salidas de tpm2_checkquote alterando TPML_PCR_SELECTION en el archivo de entrada de PCR. Como resultado, los valores de resumen se asignan incorrectamente a las ranuras y bancos de PCR, lo que proporciona una imagen engañosa del estado del TPM. Este problema se solucionó en la versión 5.7.

A flaw was found in tpm2-tools. The PCR selection, which is passed with the --pcr parameter, is not compared with the attest, making it possible for an attacker to fake a valid attestation.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-03-14 CVE Reserved
  • 2024-06-28 CVE Published
  • 2024-06-29 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-807: Reliance on Untrusted Inputs in a Security Decision
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Tpm2-software
Search vendor "Tpm2-software"
 Tpm2-tools
Search vendor "Tpm2-software" for product "Tpm2-tools"
 < 5.7
Search vendor "Tpm2-software" for product "Tpm2-tools" and version " < 5.7"
en
Affected