CVE-2021-0224 (GCVE-0-2021-0224)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:36 – Updated: 2024-09-16 20:16
VLAI?
Title
Junos OS: ANCPD core when hitting maximum-discovery-table-entries limit
Summary
A vulnerability in the handling of internal resources necessary to bring up a large number of Layer 2 broadband remote access subscriber (BRAS) nodes in Juniper Networks Junos OS can cause the Access Node Control Protocol daemon (ANCPD) to crash and restart, leading to a Denial of Service (DoS) condition. Continued processing of spoofed subscriber nodes will create a sustained Denial of Service (DoS) condition. When the number of subscribers attempting to connect exceeds the configured maximum-discovery-table-entries value, the subscriber fails to map to an internal neighbor entry, causing the ANCPD process to crash. This issue affects Juniper Networks Junos OS: All versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2.
Severity ?
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
  • Denial of Service (DoS)
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: All , < 17.3R3-S12 (custom)
Affected: 17.4 , < 17.4R2-S13 (custom)
Affected: 18.1 , < 18.1R3-S13 (custom)
Affected: 18.2 , < 18.2R3-S8 (custom)
Affected: 18.3 , < 18.3R3-S5 (custom)
Affected: 18.4 , < 18.4R1-S8, 18.4R3-S8 (custom)
Affected: 19.1 , < 19.1R3-S4 (custom)
Affected: 19.2 , < 19.2R3-S2 (custom)
Affected: 19.3 , < 19.3R3-S1 (custom)
Affected: 19.4 , < 19.4R3-S1 (custom)
Affected: 20.1 , < 20.1R2 (custom)
Affected: 20.2 , < 20.2R2 (custom)
Affected: 20.3 , < 20.3R2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T15:32:10.201Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://kb.juniper.net/JSA11119"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "17.3R3-S12",
              "status": "affected",
              "version": "All",
              "versionType": "custom"
            },
            {
              "lessThan": "17.4R2-S13",
              "status": "affected",
              "version": "17.4",
              "versionType": "custom"
            },
            {
              "lessThan": "18.1R3-S13",
              "status": "affected",
              "version": "18.1",
              "versionType": "custom"
            },
            {
              "lessThan": "18.2R3-S8",
              "status": "affected",
              "version": "18.2",
              "versionType": "custom"
            },
            {
              "lessThan": "18.3R3-S5",
              "status": "affected",
              "version": "18.3",
              "versionType": "custom"
            },
            {
              "lessThan": "18.4R1-S8, 18.4R3-S8",
              "status": "affected",
              "version": "18.4",
              "versionType": "custom"
            },
            {
              "lessThan": "19.1R3-S4",
              "status": "affected",
              "version": "19.1",
              "versionType": "custom"
            },
            {
              "lessThan": "19.2R3-S2",
              "status": "affected",
              "version": "19.2",
              "versionType": "custom"
            },
            {
              "lessThan": "19.3R3-S1",
              "status": "affected",
              "version": "19.3",
              "versionType": "custom"
            },
            {
              "lessThan": "19.4R3-S1",
              "status": "affected",
              "version": "19.4",
              "versionType": "custom"
            },
            {
              "lessThan": "20.1R2",
              "status": "affected",
              "version": "20.1",
              "versionType": "custom"
            },
            {
              "lessThan": "20.2R2",
              "status": "affected",
              "version": "20.2",
              "versionType": "custom"
            },
            {
              "lessThan": "20.3R2",
              "status": "affected",
              "version": "20.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Configurations that may be vulnerable to this issue are those where a maximum number of discovery table entries are configured.  For example:\n  [protocols ancp maximum-discovery-table-entries]"
        }
      ],
      "datePublic": "2021-04-14T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the handling of internal resources necessary to bring up a large number of Layer 2 broadband remote access subscriber (BRAS) nodes in Juniper Networks Junos OS can cause the Access Node Control Protocol daemon (ANCPD) to crash and restart, leading to a Denial of Service (DoS) condition. Continued processing of spoofed subscriber nodes will create a sustained Denial of Service (DoS) condition. When the number of subscribers attempting to connect exceeds the configured maximum-discovery-table-entries value, the subscriber fails to map to an internal neighbor entry, causing the ANCPD process to crash. This issue affects Juniper Networks Junos OS: All versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "description": "Denial of Service (DoS)",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-04-22T19:36:55.000Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kb.juniper.net/JSA11119"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R2-S13, 18.2R3-S8, 18.4R1-S8, 18.4R3-S8, 19.1R3-S4, 19.2R3-S2, 19.3R3-S1, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA11119",
        "defect": [
          "1544746"
        ],
        "discovery": "USER"
      },
      "title": "Junos OS: ANCPD core when hitting maximum-discovery-table-entries limit",
      "workarounds": [
        {
          "lang": "en",
          "value": "There are no viable workarounds for this issue."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "sirt@juniper.net",
          "DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
          "ID": "CVE-2021-0224",
          "STATE": "PUBLIC",
          "TITLE": "Junos OS: ANCPD core when hitting maximum-discovery-table-entries limit"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Junos OS",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "All",
                            "version_value": "17.3R3-S12"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "17.4",
                            "version_value": "17.4R2-S13"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "18.1",
                            "version_value": "18.1R3-S13"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "18.2",
                            "version_value": "18.2R3-S8"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "18.3",
                            "version_value": "18.3R3-S5"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "18.4",
                            "version_value": "18.4R1-S8, 18.4R3-S8"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "19.1",
                            "version_value": "19.1R3-S4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "19.2",
                            "version_value": "19.2R3-S2"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "19.3",
                            "version_value": "19.3R3-S1"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "19.4",
                            "version_value": "19.4R3-S1"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "20.1",
                            "version_value": "20.1R2"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "20.2",
                            "version_value": "20.2R2"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "20.3",
                            "version_value": "20.3R2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Juniper Networks"
              }
            ]
          }
        },
        "configuration": [
          {
            "lang": "en",
            "value": "Configurations that may be vulnerable to this issue are those where a maximum number of discovery table entries are configured.  For example:\n  [protocols ancp maximum-discovery-table-entries]"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the handling of internal resources necessary to bring up a large number of Layer 2 broadband remote access subscriber (BRAS) nodes in Juniper Networks Junos OS can cause the Access Node Control Protocol daemon (ANCPD) to crash and restart, leading to a Denial of Service (DoS) condition. Continued processing of spoofed subscriber nodes will create a sustained Denial of Service (DoS) condition. When the number of subscribers attempting to connect exceeds the configured maximum-discovery-table-entries value, the subscriber fails to map to an internal neighbor entry, causing the ANCPD process to crash. This issue affects Juniper Networks Junos OS: All versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
          }
        ],
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-770 Allocation of Resources Without Limits or Throttling"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Denial of Service (DoS)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.juniper.net/JSA11119",
              "refsource": "MISC",
              "url": "https://kb.juniper.net/JSA11119"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R2-S13, 18.2R3-S8, 18.4R1-S8, 18.4R3-S8, 19.1R3-S4, 19.2R3-S2, 19.3R3-S1, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases."
          }
        ],
        "source": {
          "advisory": "JSA11119",
          "defect": [
            "1544746"
          ],
          "discovery": "USER"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "There are no viable workarounds for this issue."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2021-0224",
    "datePublished": "2021-04-22T19:36:55.180Z",
    "dateReserved": "2020-10-27T00:00:00.000Z",
    "dateUpdated": "2024-09-16T20:16:55.041Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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.