Vulnerability-Lookup

CVE-2025-7844 (GCVE-0-2025-7844)

Vulnerability from cvelistv5 – Published: 2025-08-04 21:35 – Updated: 2025-08-05 13:36

Title

wolfTPM library wrapper function `wolfTPM2_RsaKey_TpmToWolf` copies external data to a fixed-size stack buffer without length validation potentially causing stack-based buffer overflow

Summary

Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.

Severity ?

1 (Low)


                        
                          CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Green

CWE

CWE-121

Assigner

wolfSSL

References

URL

Tags

https://github.com/wolfSSL/wolfTPM/pull/427

Impacted products

	Vendor	Product	Version
	wolfSSL Inc.	wolfTPM	Affected: 0 , ≤ 3.9.2 (git)

Credits

Richard Mitev, Giannis Mouzenidis, Patrick Jauernig from SANCTUARY Systems GmbH

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-7844

Vulnerability from fkie_nvd - Published: 2025-08-04 22:15 - Updated: 2025-08-05 14:34

Severity ?

1.0 (Low) - CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Green

Summary

References

	URL	Tags
	facts@wolfssl.com	https://github.com/wolfSSL/wolfTPM/pull/427

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible."
    },
    {
      "lang": "es",
      "value": "Exportar una clave RSA basada en TPM de m\u00e1s de 2048 bits desde el TPM podr\u00eda saturar el b\u00fafer de pila si se utiliza el valor predeterminado `MAX_RSA_KEY_BITS=2048`. Si su m\u00f3dulo TPM 2.0 admite claves RSA de m\u00e1s de 2048 bits y sus aplicaciones permiten la creaci\u00f3n o importaci\u00f3n de una clave RSA privada o p\u00fablica de m\u00e1s de 2048 bits, y su aplicaci\u00f3n llama a `wolfTPM2_RsaKey_TpmToWolf` en esa clave, podr\u00eda saturarse el b\u00fafer de pila. Si la macro de compilaci\u00f3n `MAX_RSA_KEY_BITS` est\u00e1 configurada correctamente (los bits RSA coinciden con la capacidad del hardware TPM) para el destino de hardware, no es posible que se saturara la pila."
    }
  ],
  "id": "CVE-2025-7844",
  "lastModified": "2025-08-05T14:34:17.327",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "PHYSICAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.0,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
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        "type": "Secondary"
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  "published": "2025-08-04T22:15:28.940",
  "references": [
    {
      "source": "facts@wolfssl.com",
      "url": "https://github.com/wolfSSL/wolfTPM/pull/427"
    }
  ],
  "sourceIdentifier": "facts@wolfssl.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "facts@wolfssl.com",
      "type": "Secondary"
    }
  ]
}

GHSA-C7FC-3C5J-J956

Vulnerability from github – Published: 2025-08-05 00:30 – Updated: 2025-08-05 00:30

Details

Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default MAX_RSA_KEY_BITS=2048 is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls wolfTPM2_RsaKey_TpmToWolf on that key, then a stack buffer could be overrun. If the MAX_RSA_KEY_BITS build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.

Severity ?

1.0 (Low)


                  
                    CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Green

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-7844"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-04T22:15:28Z",
    "severity": "LOW"
  },
  "details": "Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.",
  "id": "GHSA-c7fc-3c5j-j956",
  "modified": "2025-08-05T00:30:26Z",
  "published": "2025-08-05T00:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-7844"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wolfSSL/wolfTPM/pull/427"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Green",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-7844 (GCVE-0-2025-7844)

FKIE_CVE-2025-7844

GHSA-C7FC-3C5J-J956

Tags

Sightings

Nomenclature