CVE-2023-41325

{"id": "CVE-2023-41325", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 1.1}]}, "published": "2023-09-15T20:15:10.800", "references": [{"url": "https://github.com/OP-TEE/optee_os/commit/e2ec831cb07ed0099535c7c140cb6338aa62816a", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-jrw7-63cq-7vhm", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-415"}]}], "descriptions": [{"lang": "en", "value": "OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.20 and prior to version 3.22, `shdr_verify_signature` can make a double free. `shdr_verify_signature` used to verify a TA binary before it is loaded. To verify a signature of it, allocate a memory for RSA key. RSA key allocate function (`sw_crypto_acipher_alloc_rsa_public_key`) will try to allocate a memory (which is optee\u2019s heap memory). RSA key is consist of exponent and modulus (represent as variable `e`, `n`) and it allocation is not atomic way, so it may succeed in `e` but fail in `n`. In this case sw_crypto_acipher_alloc_rsa_public_key` will free on `e` and return as it is failed but variable \u2018e\u2019 is remained as already freed memory address . `shdr_verify_signature` will free again that memory (which is `e`) even it is freed when it failed allocate RSA key. A patch is available in version 3.22. No known workarounds are available."}, {"lang": "es", "value": "OP-TEE es un Entorno de Ejecuci\u00f3n Confiable (TEE) dise\u00f1ado como complemento de un kernel de Linux no seguro que se ejecuta en Arm; N\u00facleos Cortex-A que utilizan la tecnolog\u00eda TrustZone. A partir de la versi\u00f3n 3.20 y anteriores a la versi\u00f3n 3.22, `shdr_verify_signature` puede hacer un doble libremente. `shdr_verify_signature` se usa para verificar un binario TA antes de cargarlo. Para verificar una firma del mismo, asigne una memoria para la clave RSA. La funci\u00f3n de asignaci\u00f3n de clave RSA (`sw_crypto_acipher_alloc_rsa_public_key`) intentar\u00e1 asignar una memoria (que es la memoria del mont\u00f3n del candidato). La clave RSA consta de exponente y m\u00f3dulo (representados como variables `e`, `n`) y su asignaci\u00f3n no es de forma at\u00f3mica, por lo que puede tener \u00e9xito en `e` pero fallar en `n`. En este caso, sw_crypto_acipher_alloc_rsa_public_key` se liberar\u00e1 en `e` y regresar\u00e1 cuando fall\u00f3, pero la variable \u201ce\u201d permanece como direcci\u00f3n de memoria ya liberada. `shdr_verify_signature` liberar\u00e1 nuevamente esa memoria (que es `e`), incluso si se libera cuando no se pudo asignar la clave RSA. Hay un parche disponible en la versi\u00f3n 3.22. No hay workarounds conocidos disponibles."}], "lastModified": "2023-09-22T19:07:17.333", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linaro:op-tee:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F01EDA96-EF6E-4A65-8831-4B42ED235B96", "versionEndExcluding": "3.22.0", "versionStartIncluding": "3.20.0"}, {"criteria": "cpe:2.3:o:linaro:op-tee:3.22.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D516A715-0899-4350-9992-FF21D31AD67B"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}