github - ghsa-g4hc-h3h3-22rv

GHSA-G4HC-H3H3-22RV

Vulnerability from github – Published: 2025-07-11 18:30 – Updated: 2025-11-03 21:34

Details

A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants.

Severity ?

7.8 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2025-7028"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-11T16:15:27Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants.",
  "id": "GHSA-g4hc-h3h3-22rv",
  "modified": "2025-11-03T21:34:05Z",
  "published": "2025-07-11T18:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-7028"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/746790"
    },
    {
      "type": "WEB",
      "url": "https://www.binarly.io/advisories/brly-dva-2025-010"
    },
    {
      "type": "WEB",
      "url": "https://www.gigabyte.com/Support/Security"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/746790"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-7028 (GCVE-0-2025-7028)

Vulnerability from cvelistv5 – Published: 2025-07-11 15:26 – Updated: 2025-11-03 20:07

Title

SMM Arbitrary Memory Access via Flash Handler with Unchecked FuncBlock Pointer

Summary

Severity ?

7.8 (High)


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

CWE

CWE-822 Untrusted Pointer Dereference

Assigner

certcc

References

URL

Tags

	https://www.gigabyte.com/Support/Security
	https://www.binarly.io/advisories/brly-dva-2025-010
	https://kb.cert.org/vuls/id/746790

Impacted products

	Vendor	Product	Version
	GIGABYTE	UEFI-SmiFlash	Affected: 1.0.0

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-7028",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-14T16:45:13.338112Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-15T19:54:56.492Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:07:22.755Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.kb.cert.org/vuls/id/746790"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "UEFI-SmiFlash",
          "vendor": "GIGABYTE",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-822 Untrusted Pointer Dereference",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-11T15:26:11.382Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://www.gigabyte.com/Support/Security"
        },
        {
          "url": "https://www.binarly.io/advisories/brly-dva-2025-010"
        },
        {
          "url": "https://kb.cert.org/vuls/id/746790"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "SMM Arbitrary Memory Access via Flash Handler with Unchecked FuncBlock Pointer",
      "x_generator": {
        "engine": "VINCE 3.0.21",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2025-7028"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2025-7028",
    "datePublished": "2025-07-11T15:26:11.382Z",
    "dateReserved": "2025-07-02T15:43:20.928Z",
    "dateUpdated": "2025-11-03T20:07:22.755Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-G4HC-H3H3-22RV

CVE-2025-7028 (GCVE-0-2025-7028)

Tags

Sightings

Nomenclature