github - ghsa-f8pw-77pg-8gv6

GHSA-F8PW-77PG-8GV6

Vulnerability from github – Published: 2022-02-10 00:01 – Updated: 2025-11-04 21:30

Details

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).

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2020-5953"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-02-03T01:15:00Z",
    "severity": "HIGH"
  },
  "details": "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).",
  "id": "GHSA-f8pw-77pg-8gv6",
  "modified": "2025-11-04T21:30:26Z",
  "published": "2022-02-10T00:01:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5953"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220222-0005"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/products"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/security-pledge"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/796611"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2020-5953 (GCVE-0-2020-5953)

Vulnerability from cvelistv5 – Published: 2022-02-03 01:00 – Updated: 2025-11-04 19:12

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://www.insyde.com/products	x_refsource_MISC
	https://www.insyde.com/security-pledge	x_refsource_MISC
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://security.netapp.com/advisory/ntap-2022022…	x_refsource_CONFIRM

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        "providerMetadata": {
          "dateUpdated": "2025-11-04T19:12:23.190Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
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              "x_transferred"
            ],
            "url": "https://www.insyde.com/products"
          },
          {
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              "x_transferred"
            ],
            "url": "https://www.insyde.com/security-pledge"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20220222-0005/"
          },
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          }
        ],
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Sightings

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.

Action not permitted

GHSA-F8PW-77PG-8GV6

CVE-2020-5953 (GCVE-0-2020-5953)

Tags

Sightings

Nomenclature