CVE-2025-7844

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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2025-08-04 22:15

Updated : 2025-08-05 14:34

NVD link : CVE-2025-7844

Mitre link : CVE-2025-7844

CVE.ORG link : CVE-2025-7844

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

{"id": "CVE-2025-7844", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "facts@wolfssl.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 1.0, "Automatable": "NOT_DEFINED", "attackVector": "PHYSICAL", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "GREEN", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-08-04T22:15:28.940", "references": [{"url": "https://github.com/wolfSSL/wolfTPM/pull/427", "source": "facts@wolfssl.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "facts@wolfssl.com", "description": [{"lang": "en", "value": "CWE-121"}]}], "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."}], "lastModified": "2025-08-05T14:34:17.327", "sourceIdentifier": "facts@wolfssl.com"}