GSD-2021-3761

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP "MaxLength" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as "RPKI invalid". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.
Aliases
Aliases
CVE-2021-3761
To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-3761",
    "description": "Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP \"MaxLength\" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as \"RPKI invalid\". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.",
    "id": "GSD-2021-3761",
    "references": [
      "https://www.debian.org/security/2022/dsa-5041"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-3761"
      ],
      "details": "Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP \"MaxLength\" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as \"RPKI invalid\". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.",
      "id": "GSD-2021-3761",
      "modified": "2023-12-13T01:23:35.321557Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cna@cloudflare.com",
        "DATE_PUBLIC": "2021-09-03T16:28:00.000Z",
        "ID": "CVE-2021-3761",
        "STATE": "PUBLIC",
        "TITLE": "OctoRPKI lacks contextual out-of-bounds check when validating RPKI ROA maxLength values"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "octorpki",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_value": "1.3.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Cloudflare"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "Job Snijders"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP \"MaxLength\" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as \"RPKI invalid\". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues."
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Missing out of bounds check"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9",
            "refsource": "MISC",
            "url": "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9"
          },
          {
            "name": "DSA-5041",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2022/dsa-5041"
          }
        ]
      },
      "solution": [
        {
          "lang": "eng",
          "value": "Upgrade to 1.3.0"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003cv1.3.0",
          "affected_versions": "All versions before 1.3.0",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-787",
            "CWE-937"
          ],
          "date": "2022-04-04",
          "description": "Any CA issuer in the RPKI can trick OctoRPKI into emitting an invalid VRP `MaxLength` value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as `RPKI invalid`. Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.",
          "fixed_versions": [
            "v1.3.0"
          ],
          "identifier": "CVE-2021-3761",
          "identifiers": [
            "CVE-2021-3761",
            "GHSA-c8xp-8mf3-62h9"
          ],
          "not_impacted": "",
          "package_slug": "go/github.com/cloudflare/cfrpki",
          "pubdate": "2021-09-09",
          "solution": "Upgrade to version 1.3.0 or above.",
          "title": "Out-of-bounds Write",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-3761"
          ],
          "uuid": "b4a9ae59-4cb2-4595-9668-f1a542a9fbd7",
          "versions": [
            {
              "commit": {
                "sha": "a8db4e009ef217484598ba1fd1c595b54e0f6422",
                "tags": [
                  "v1.3.0"
                ],
                "timestamp": "20210819152514"
              },
              "number": "v1.3.0"
            }
          ]
        },
        {
          "affected_range": "\u003cv1.3.0",
          "affected_versions": "All versions before 1.3.0",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-787",
            "CWE-937"
          ],
          "date": "2023-02-07",
          "description": "Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP \"MaxLength\" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as \"RPKI invalid\". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.",
          "fixed_versions": [
            "v1.3.0"
          ],
          "identifier": "CVE-2021-3761",
          "identifiers": [
            "GHSA-c8xp-8mf3-62h9",
            "CVE-2021-3761"
          ],
          "not_impacted": "All versions starting from 1.3.0",
          "package_slug": "go/github.com/cloudflare/cfrpki/validator/lib",
          "pubdate": "2021-09-07",
          "solution": "Upgrade to version 1.3.0 or above.",
          "title": "Out-of-bounds Write",
          "urls": [
            "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9",
            "https://github.com/cloudflare/cfrpki/commit/a8db4e009ef217484598ba1fd1c595b54e0f6422",
            "https://github.com/cloudflare/cfrpki/releases/tag/v1.3.0",
            "https://nvd.nist.gov/vuln/detail/CVE-2021-3761",
            "https://www.debian.org/security/2022/dsa-5041",
            "https://github.com/cloudflare/cfrpki/pull/90",
            "https://pkg.go.dev/vuln/GO-2022-0246",
            "https://github.com/advisories/GHSA-c8xp-8mf3-62h9"
          ],
          "uuid": "7709fc5c-76ee-480b-ad00-e8e453ba5a34",
          "versions": [
            {
              "commit": {
                "sha": "a8db4e009ef217484598ba1fd1c595b54e0f6422",
                "tags": [
                  "v1.3.0"
                ],
                "timestamp": "20210819152514"
              },
              "number": "v1.3.0"
            }
          ]
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.3.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
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        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cna@cloudflare.com",
          "ID": "CVE-2021-3761"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP \"MaxLength\" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as \"RPKI invalid\". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues."
            }
          ]
        },
        "problemtype": {
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            {
              "description": [
                {
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                  "value": "CWE-787"
                }
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "N/A",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9"
            },
            {
              "name": "DSA-5041",
              "refsource": "DEBIAN",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.debian.org/security/2022/dsa-5041"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-04-04T13:41Z",
      "publishedDate": "2021-09-09T14:15Z"
    }
  }
}


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