Vulnerability-Lookup

FKIE_CVE-2021-22945

Vulnerability from fkie_nvd - Published: 2021-09-23 13:15 - Updated: 2026-06-17 03:38

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

References

URL	Tags
support@hackerone.com	http://seclists.org/fulldisclosure/2022/Mar/29	Mailing List, Third Party Advisory
support@hackerone.com	https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	Patch, Third Party Advisory
support@hackerone.com	https://hackerone.com/reports/1269242	Exploit, Patch, Third Party Advisory
support@hackerone.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/	Mailing List, Third Party Advisory
support@hackerone.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/	Mailing List, Third Party Advisory
support@hackerone.com	https://security.gentoo.org/glsa/202212-01	Third Party Advisory
support@hackerone.com	https://security.netapp.com/advisory/ntap-20211029-0003/	Third Party Advisory
support@hackerone.com	https://support.apple.com/kb/HT213183	Third Party Advisory
support@hackerone.com	https://www.debian.org/security/2022/dsa-5197	Third Party Advisory
support@hackerone.com	https://www.oracle.com/security-alerts/cpuoct2021.html	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://seclists.org/fulldisclosure/2022/Mar/29	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://hackerone.com/reports/1269242	Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.gentoo.org/glsa/202212-01	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20211029-0003/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://support.apple.com/kb/HT213183	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.debian.org/security/2022/dsa-5197	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.oracle.com/security-alerts/cpuoct2021.html	Patch, Third Party Advisory

Impacted products

Vendor	Product	Version
haxx	libcurl	*
fedoraproject	fedora	33
fedoraproject	fedora	35
netapp	cloud_backup	-
netapp	clustered_data_ontap	-
oracle	mysql_server	*
oracle	mysql_server	*
netapp	h300s_firmware	-
netapp	h300s	-
netapp	h500s_firmware	-
netapp	h500s	-
netapp	h700s_firmware	-
netapp	h700s	-
netapp	h300e_firmware	-
netapp	h300e	-
netapp	h500e_firmware	-
netapp	h500e	-
netapp	h700e_firmware	-
netapp	h700e	-
netapp	h410s_firmware	-
netapp	h410s	-
netapp	solidfire_baseboard_management_controller_firmware	-
netapp	solidfire_baseboard_management_controller	-
apple	macos	*
siemens	sinec_ins	*
debian	debian_linux	11.0
splunk	universal_forwarder	*
splunk	universal_forwarder	*
splunk	universal_forwarder	9.1.0

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "product": "https://github.com/curl/curl",
          "vendor": "n/a",
          "versions": [
            {
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When sending data to an MQTT server, libcurl \u003c= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*."
    },
    {
      "lang": "es",
      "value": "Cuando se env\u00edan datos a un servidor MQTT, libcurl versiones anteriores a 7.73.0, incluy\u00e9ndola y 7.78.0, podr\u00eda en algunas circunstancias, mantener err\u00f3neamente un puntero a un \u00e1rea de memoria ya liberada y usarlo de nuevo en una llamada posterior para enviar datos y tambi\u00e9n liberarlo *de nuevo*"
    }
  ],
  "id": "CVE-2021-22945",
  "lastModified": "2026-06-17T03:38:04.823",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:P",
          "version": "2.0"
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "cvssData": {
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          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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    "ssvcV203": [
      {
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              "automatable": "yes"
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          "role": "CISA Coordinator",
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.gentoo.org/glsa/202212-01"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20211029-0003/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://support.apple.com/kb/HT213183"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2022/dsa-5197"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2021-22945 (GCVE-0-2021-22945)

Vulnerability from cvelistv5 – Published: 2021-09-23 00:00 – Updated: 2025-06-09 14:47

Summary

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-28 15:53 UTC

CWE

CWE-415 - Double Free (CWE-415)
CWE-415 - Double Free

Assigner

hackerone mitre root Scorecard

References

10 references

URL	Tags
https://hackerone.com/reports/1269242
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
https://security.netapp.com/advisory/ntap-2021102…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://cert-portal.siemens.com/productcert/pdf/s…
https://support.apple.com/kb/HT213183
http://seclists.org/fulldisclosure/2022/Mar/29	mailing-list
https://www.debian.org/security/2022/dsa-5197	vendor-advisory
https://security.gentoo.org/glsa/202212-01	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
n/a	https://github.com/curl/curl	Affected: curl 7.73.0 to and including 7.78.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:58:26.137Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1269242"
          },
          {
            "name": "FEDORA-2021-fc96a3a749",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
          },
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            "url": "https://security.netapp.com/advisory/ntap-20211029-0003/"
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          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://support.apple.com/kb/HT213183"
          },
          {
            "name": "20220314 APPLE-SA-2022-03-14-4 macOS Monterey 12.3",
            "tags": [
              "mailing-list",
              "x_transferred"
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            ],
            "url": "https://security.gentoo.org/glsa/202212-01"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-22945",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-28T15:53:40.610696Z",
                "version": "2.0.3"
              },
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                "description": "CWE-415 Double Free",
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "cna": {
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          "vendor": "n/a",
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        }
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        },
        {
          "name": "FEDORA-2021-1d24845e93",
          "tags": [
            "vendor-advisory"
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        },
        {
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
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  "cveMetadata": {
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    "assignerShortName": "hackerone",
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    "datePublished": "2021-09-23T00:00:00.000Z",
    "dateReserved": "2021-01-06T00:00:00.000Z",
    "dateUpdated": "2025-06-09T14:47:23.444Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2021-22945

CVE-2021-22945 (GCVE-0-2021-22945)

Tags

Sightings

Nomenclature

Related by attack behaviour