FKIE_CVE-2020-5953

Vulnerability from fkie_nvd - Published: 2022-02-03 01:15 - Updated: 2025-11-04 20:15
Severity ?
7.5 (High) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Summary
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
References
cve@mitre.orghttps://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20220222-0005/Third Party Advisory
cve@mitre.orghttps://www.insyde.com/productsProduct, Vendor Advisory
cve@mitre.orghttps://www.insyde.com/security-pledgeVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20220222-0005/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.insyde.com/productsProduct, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.insyde.com/security-pledgeVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/796611
Impacted products
Vendor Product Version
insyde insydeh2o 5.12.09.0074
insyde insydeh2o 5.23.04.0045
insyde insydeh2o 5.23.45.0023
insyde insydeh2o 5.33.15.0034
insyde insydeh2o 5.34.03.0029
insyde insydeh2o 5.42.03.0010
siemens ruggedcom_ape1808_firmware -
siemens ruggedcom_ape1808 -
siemens simatic_field_pg_m6_firmware -
siemens simatic_field_pg_m6 -
siemens simatic_ipc127e_firmware -
siemens simatic_ipc127e -
siemens simatic_ipc227g_firmware -
siemens simatic_ipc227g -
siemens simatic_ipc277g_firmware -
siemens simatic_ipc277g -
siemens simatic_itp1000_firmware -
siemens simatic_itp1000 -
siemens simatic_ipc477e_pro_firmware -
siemens simatic_ipc477e_pro -
siemens simatic_ipc627e_firmware -
siemens simatic_ipc627e -
siemens simatic_ipc647e_firmware -
siemens simatic_ipc647e -
siemens simatic_ipc677e_firmware -
siemens simatic_ipc677e -
siemens simatic_ipc847e_firmware -
siemens simatic_ipc847e -
siemens simatic_ipc327g_firmware -
siemens simatic_ipc327g -
siemens simatic_ipc377g_firmware -
siemens simatic_ipc377g -
siemens simatic_ipc427e_firmware -
siemens simatic_ipc427e -
siemens simatic_ipc477e_firmware -
siemens simatic_ipc477e -
siemens simatic_field_pg_m5_firmware -
siemens simatic_field_pg_m5 -
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2)."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad en el manejador de Interrupciones de administraci\u00f3n del Sistema (SWSMI) del c\u00f3digo del Firmware UEFI de InsydeH2O ubicado en el manejador SWSMI que desreferencia el puntero gRT (EFI_RUNTIME_SERVICES) para llamar a un servicio GetVariable, que es encontrado fuera de la SMRAM. Esto puede resultar en una ejecuci\u00f3n de c\u00f3digo en SMM (escalando el privilegio del anillo 0 al anillo -2)"
    }
  ],
  "id": "CVE-2020-5953",
  "lastModified": "2025-11-04T20:15:58.837",
  "metrics": {
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        "acInsufInfo": false,
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          "confidentialityImpact": "HIGH",
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
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  "published": "2022-02-03T01:15:07.647",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "NVD-CWE-noinfo"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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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.