CVE-2026-28224 (GCVE-0-2026-28224)

Vulnerability from cvelistv5 – Published: 2026-04-17 18:38 – Updated: 2026-04-17 19:31
VLAI?
Title
Firebird Null Pointer Dereference via CryptCallback causes DOS
Summary
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
FirebirdSQL firebird Affected: >= 3.0.0, < 3.0.14
Affected: >= 4.0.0, < 4.0.7
Affected: >= 5.0.0, < 5.0.4
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-28224",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T19:31:35.290539Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-17T19:31:38.952Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "firebird",
          "vendor": "FirebirdSQL",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.0.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.0.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.0.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server\u0027s IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-17T18:38:58.138Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95"
        },
        {
          "name": "https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14"
        },
        {
          "name": "https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7"
        },
        {
          "name": "https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4"
        }
      ],
      "source": {
        "advisory": "GHSA-xrcw-wpjx-pr95",
        "discovery": "UNKNOWN"
      },
      "title": "Firebird Null Pointer Dereference via CryptCallback causes DOS"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-28224",
    "datePublished": "2026-04-17T18:38:58.138Z",
    "dateReserved": "2026-02-25T15:28:40.650Z",
    "dateUpdated": "2026-04-17T19:31:38.952Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-28224\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-04-17T19:16:35.983\",\"lastModified\":\"2026-04-17T20:16:32.460\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server\u0027s IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-28224\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-17T19:31:35.290539Z\"}}}], \"references\": [{\"url\": \"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-17T19:31:27.860Z\"}}], \"cna\": {\"title\": \"Firebird Null Pointer Dereference via CryptCallback causes DOS\", \"source\": {\"advisory\": \"GHSA-xrcw-wpjx-pr95\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"FirebirdSQL\", \"product\": \"firebird\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 3.0.0, \u003c 3.0.14\"}, {\"status\": \"affected\", \"version\": \"\u003e= 4.0.0, \u003c 4.0.7\"}, {\"status\": \"affected\", \"version\": \"\u003e= 5.0.0, \u003c 5.0.4\"}]}], \"references\": [{\"url\": \"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95\", \"name\": \"https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14\", \"name\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7\", \"name\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4\", \"name\": \"https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server\u0027s IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476: NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-17T18:38:58.138Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-28224\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-17T19:31:38.952Z\", \"dateReserved\": \"2026-02-25T15:28:40.650Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-04-17T18:38:58.138Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.