github - ghsa-9fr3-m8v5-v6g9

GHSA-9FR3-M8V5-V6G9

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

Details

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated table variable EFI_BOOT_SERVICES. This allows an attacker who is capable of executing code in DXE phase to exploit this vulnerability to escalate privileges to SMM. The attacker can overwrite the LocateProtocol or Freepool memory address location to execute unwanted code.

Severity ?

8.2 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-41840"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-02-03T02:15:00Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated table variable EFI_BOOT_SERVICES. This allows an attacker who is capable of executing code in DXE phase to exploit this vulnerability to escalate privileges to SMM. The attacker can overwrite the LocateProtocol or Freepool memory address location to execute unwanted code.",
  "id": "GHSA-9fr3-m8v5-v6g9",
  "modified": "2025-11-04T21:30:26Z",
  "published": "2022-02-10T00:00:59Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41840"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220217-0014"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/security-pledge"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/security-pledge/SA-2022018"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/796611"
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-41840 (GCVE-0-2021-41840)

Vulnerability from cvelistv5 – Published: 2022-02-03 01:20 – Updated: 2025-11-04 19:12

Summary

An issue was discovered in NvmExpressDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of Inclusion of Functionality from an Untrusted Control Sphere.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://www.insyde.com/security-pledge	x_refsource_MISC
	https://www.insyde.com/security-pledge/SA-2022018	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-2022021…	x_refsource_CONFIRM
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

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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-9FR3-M8V5-V6G9

CVE-2021-41840 (GCVE-0-2021-41840)

Tags

Sightings

Nomenclature