Vulnerability-Lookup

GHSA-CM2C-8C7C-974F

Vulnerability from github – Published: 2022-05-24 19:02 – Updated: 2022-05-24 19:02

Details

Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence <= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-31876"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-13T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence \u003c= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction.",
  "id": "GHSA-cm2c-8c7c-974f",
  "modified": "2022-05-24T19:02:31Z",
  "published": "2022-05-24T19:02:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31876"
    },
    {
      "type": "WEB",
      "url": "https://bitcoinops.org/en/newsletters/2021/05/12"
    },
    {
      "type": "WEB",
      "url": "https://bitcoinops.org/en/topics/replace-by-fee"
    },
    {
      "type": "WEB",
      "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitcoin/bitcoin"
    },
    {
      "type": "WEB",
      "url": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2021-31876 (GCVE-0-2021-31876)

Vulnerability from cvelistv5 – Published: 2021-05-13 21:03 – Updated: 2024-08-03 23:10

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://en.bitcoin.it/wiki/Common_Vulnerabilities…	x_refsource_MISC
https://bitcoinops.org/en/topics/replace-by-fee/	x_refsource_MISC
https://github.com/bitcoin/bitcoin	x_refsource_MISC
https://lists.linuxfoundation.org/pipermail/bitco…	x_refsource_MISC
https://bitcoinops.org/en/newsletters/2021/05/12/	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:10:31.041Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bitcoinops.org/en/topics/replace-by-fee/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/bitcoin/bitcoin"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bitcoinops.org/en/newsletters/2021/05/12/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence \u003c= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-05-13T21:03:38.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bitcoinops.org/en/topics/replace-by-fee/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/bitcoin/bitcoin"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bitcoinops.org/en/newsletters/2021/05/12/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-31876",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence \u003c= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876",
              "refsource": "MISC",
              "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures#CVE-2021-31876"
            },
            {
              "name": "https://bitcoinops.org/en/topics/replace-by-fee/",
              "refsource": "MISC",
              "url": "https://bitcoinops.org/en/topics/replace-by-fee/"
            },
            {
              "name": "https://github.com/bitcoin/bitcoin",
              "refsource": "MISC",
              "url": "https://github.com/bitcoin/bitcoin"
            },
            {
              "name": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html",
              "refsource": "MISC",
              "url": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-May/018893.html"
            },
            {
              "name": "https://bitcoinops.org/en/newsletters/2021/05/12/",
              "refsource": "MISC",
              "url": "https://bitcoinops.org/en/newsletters/2021/05/12/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-31876",
    "datePublished": "2021-05-13T21:03:38.000Z",
    "dateReserved": "2021-04-29T00:00:00.000Z",
    "dateUpdated": "2024-08-03T23:10:31.041Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-CM2C-8C7C-974F

CVE-2021-31876 (GCVE-0-2021-31876)

Tags

Sightings

Nomenclature

Related by attack behaviour