CVE-2023-43634

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was added to the list of PCRs that seal/unseal the key.\n\nIn commit \u201c56e589749c6ff58ded862d39535d43253b249acf\u201d, the config partition\nmeasurement moved from PCR 13 to PCR 14, but PCR 14 was not added to the list of\nPCRs that seal/unseal the key.\n\nThis change makes the measurement of PCR 14 effectively redundant as it would not affect\nthe sealing/unsealing of the key.\n\n\n\nAn attacker could modify the config partition without triggering the measured boot, this could\nresult in the attacker gaining full control over the device with full access to the contents of the\nencrypted \u201cvault\u201d\n\n\n\n\n", "supportingMedia": [{"type": "text/html", "value": "\n\nWhen sealing/unsealing the \u201cvault\u201d key, a list of PCRs is used, which defines which PCRs\nare used.\n<br>In a previous project, CYMOTIVE found that the configuration is not protected by the secure\nboot, and in response Zededa implemented measurements on the config partition that was\nmapped to PCR 13.\n<br>In that process, PCR 13 was added to the list of PCRs that seal/unseal the key.\n<br>In commit \u201c56e589749c6ff58ded862d39535d43253b249acf\u201d, the config partition\nmeasurement moved from PCR 13 to PCR 14, but PCR 14 was not added to the list of\nPCRs that seal/unseal the key.\n<br>This change makes the measurement of PCR 14 effectively redundant as it would not affect\nthe sealing/unsealing of the key.<br><br>\n\nAn attacker could modify the config partition without triggering the measured boot, this could\nresult in the attacker gaining full control over the device with full access to the contents of the\nencrypted \u201cvault\u201d\n\n\n\n<br>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-522", "description": "CWE-522 Insufficiently Protected Credentials"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-922", "description": "CWE-922 Insecure Storage of Sensitive Information"}]}], 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "EVE OS", "product": "EVE OS", "programFiles": ["https://github.com/lf-edge/eve/tree/master/pkg/pillar/evetpm/tpm.go", "https://github.com/lf-edge/eve/tree/master/pkg/grub/rootfs.go", "https://github.com/lf-edge/eve/tree/master/pkg/measure-config/src/measurefs.go"], "repo": "https://github.com/lf-edge/eve", "vendor": " LF-Edge, Zededa", "versions": [{"lessThan": "8.6.0", "status": "affected", "version": "0", "versionType": "release"}, {"lessThan": "9.5.0", "status": "affected", "version": "9.0.0", "versionType": "release"}]}], "source": "cve@asrg.io"}, {"affectedData": [{"cpes": ["cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "product": "eve", "vendor": "lfedge", "versions": [{"lessThan": "8.6.0", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "9.5.0", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:*", "matchCriteriaId": "95D311A8-5FBD-49AF-AD11-8B78420BAEAE", "versionEndExcluding": "8.6.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:lfedge:eve:*:*:*:*:*:*:*:*", "matchCriteriaId": "A3648A14-186C-4E6A-AA73-7D2F5C78019D", "versionEndExcluding": "9.5.0", "versionStartIncluding": "9.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "\nWhen sealing/unsealing the \u201cvault\u201d key, a list of PCRs is used, which defines which PCRs\nare used.\n\nIn a previous project, CYMOTIVE found that the configuration is not protected by the secure\nboot, and in response Zededa implemented measurements on the config partition that was\nmapped to PCR 13.\n\nIn that process, PCR 13 was added to the list of PCRs that seal/unseal the key.\n\nIn commit \u201c56e589749c6ff58ded862d39535d43253b249acf\u201d, the config partition\nmeasurement moved from PCR 13 to PCR 14, but PCR 14 was not added to the list of\nPCRs that seal/unseal the key.\n\nThis change makes the measurement of PCR 14 effectively redundant as it would not affect\nthe sealing/unsealing of the key.\n\n\n\nAn attacker could modify the config partition without triggering the measured boot, this could\nresult in the attacker gaining full control over the device with full access to the contents of the\nencrypted \u201cvault\u201d\n\n\n\n\n"}, {"lang": "es", "value": "Al sellar/abrir la clave de \u201cvault\u201d, se utiliza una lista de PCRs, que define qu\u00e9 PCRs se utilizan. En un proyecto anterior, CYMOTIVE descubri\u00f3 que la configuraci\u00f3n no est\u00e1 protegida por el arranque seguro y, en respuesta, Zededa implement\u00f3 medidas en la partici\u00f3n de configuraci\u00f3n que estaba asignada a PCR 13. En ese proceso, PCR 13 se agreg\u00f3 a la lista de PCRs que sellan /abrir la llave. En el commit \u201c56e589749c6ff58ded862d39535d43253b249acf\u201d, la medici\u00f3n de la partici\u00f3n de configuraci\u00f3n pas\u00f3 de PCR 13 a PCR 14, pero PCR 14 no se agreg\u00f3 a la lista de PCR que sellan/abren la clave. Este cambio hace que la medici\u00f3n de PCR 14 sea efectivamente redundante ya que no afectar\u00eda el sellado/abrir de la llave. Un atacante podr\u00eda modificar la partici\u00f3n de configuraci\u00f3n sin activar el arranque medido, lo que podr\u00eda dar como resultado que el atacante obtenga control total sobre el dispositivo con acceso completo al contenido de la \"vault\" cifrada."}], "id": "CVE-2023-43634", "lastModified": "2026-06-17T06:26:07.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "cve@asrg.io", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-43634", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-09-24T16:48:31.106489Z", "version": "2.0.3"}}]}, "published": "2023-09-21T14:15:11.477", "references": [{"source": "cve@asrg.io", "tags": ["Third Party Advisory"], "url": "https://asrg.io/security-advisories/cve-2023-43634/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://asrg.io/security-advisories/cve-2023-43634/"}], "sourceIdentifier": "cve@asrg.io", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-522"}, {"lang": "en", "value": "CWE-922"}], "source": "cve@asrg.io", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-522"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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