CVE-2021-43997

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-43997", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-04T04:10:16.905Z", "dateReserved": "2021-11-17T00:00:00.000Z", "datePublished": "2021-11-17T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-10-11T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "FreeRTOS versions 10.2.0 through 10.4.5 do not prevent non-kernel code from calling the xPortRaisePrivilege internal function to raise privilege. FreeRTOS versions through 10.4.6 do not prevent a third party that has already independently gained the ability to execute injected code to achieve further privilege escalation by branching directly inside a FreeRTOS MPU API wrapper function with a manually crafted stack frame. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with MPU support enabled (i.e. configENABLE_MPU set to 1). These are fixed in V10.5.0 and in V10.4.3-LTS Patch 3."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2"}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6"}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0"}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:10:16.905Z"}, "title": "CVE Program Container", "references": [{"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2", "tags": ["x_transferred"]}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6", "tags": ["x_transferred"]}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0", "tags": ["x_transferred"]}, {"url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3", "tags": ["x_transferred"]}]}]}}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:amazon:freertos:*:*:*:*:-:*:*:*", "matchCriteriaId": "4FB285CB-30B9-4537-9AC8-7C0BF1643D05", "versionEndExcluding": "10.4.6", "versionStartIncluding": "10.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:amazon:freertos:10.4.3:patch1:*:*:lts:*:*:*", "matchCriteriaId": "95529D7D-3DBE-4227-811F-BBE6F0281CFE", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "FreeRTOS versions 10.2.0 through 10.4.5 do not prevent non-kernel code from calling the xPortRaisePrivilege internal function to raise privilege. FreeRTOS versions through 10.4.6 do not prevent a third party that has already independently gained the ability to execute injected code to achieve further privilege escalation by branching directly inside a FreeRTOS MPU API wrapper function with a manually crafted stack frame. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with MPU support enabled (i.e. configENABLE_MPU set to 1). These are fixed in V10.5.0 and in V10.4.3-LTS Patch 3."}, {"lang": "es", "value": "Las versiones de FreeRTOS versiones10.2.0 hasta la 10.4.5 no evitan que el c\u00f3digo que no es del n\u00facleo llame a la funci\u00f3n interna xPortRaisePrivilege para elevar el privilegio. Las versiones de FreeRTOS hasta la 10.4.6 no impiden que un tercero que ya haya obtenido de forma independiente la capacidad de ejecutar c\u00f3digo inyectado consiga una mayor elevaci\u00f3n de privilegios bifurc\u00e1ndose directamente dentro de una funci\u00f3n envolvente de la API de FreeRTOS MPU con un marco de pila manipulado manualmente. Estos problemas afectan a los puertos ARMv7-M MPU, y a los puertos ARMv8-M con soporte MPU habilitado (es decir, configENABLE_MPU establecido en 1). Estos problemas se han solucionado en V10.5.0 y en V10.4.3-LTS Parche 3."}], "id": "CVE-2021-43997", "lastModified": "2026-06-17T04:11:45.760", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-17T21:15:07.780", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2"}, {"source": "cve@mitre.org", "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6"}, {"source": "cve@mitre.org", "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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