{
  "GSD": {
    "alias": "CVE-2024-20319",
    "id": "GSD-2024-20319"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-20319"
      ],
      "details": "A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device.\r\n\r This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.",
      "id": "GSD-2024-20319",
      "modified": "2023-12-13T01:21:43.174300Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "ID": "CVE-2024-20319",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Cisco IOS XR Software",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "5.2.0"
                        },
                        {
                          "version_affected": "=",
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                        },
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                          "version_affected": "=",
                          "version_value": "5.2.2"
                        },
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                          "version_affected": "=",
                          "version_value": "5.2.4"
                        },
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                          "version_affected": "=",
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                          "version_affected": "=",
                          "version_value": "5.2.5"
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                          "version_value": "5.2.47"
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                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
                          "version_value": "6.1.22"
                        },
                        {
                          "version_affected": "=",
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                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.1.36"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.1.42"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.2.1"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.2.2"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.2.3"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.2.25"
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                        {
                          "version_affected": "=",
                          "version_value": "6.2.11"
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                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                        {
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                        {
                          "version_affected": "=",
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                        },
                        {
                          "version_affected": "=",
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                        {
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_value": "7.4.2"
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
                          "version_value": "7.5.5"
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                        {
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                          "version_affected": "=",
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                        {
                          "version_affected": "=",
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                          "version_affected": "=",
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                          "version_affected": "=",
                          "version_value": "7.7.21"
                        },
                        {
                          "version_affected": "=",
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                        },
                        {
                          "version_affected": "=",
                          "version_value": "6.9.2"
                        },
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                          "version_affected": "=",
                          "version_value": "7.8.1"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.8.2"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.9.1"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.9.2"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.9.21"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.10.1"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.10.2"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "7.11.1"
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                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Cisco"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device.\r\n\r This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests."
          }
        ]
      },
      "exploit": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-284",
                "lang": "eng",
                "value": "Improper Access Control"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF",
            "refsource": "MISC",
            "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF"
          }
        ]
      },
      "source": {
        "advisory": "cisco-sa-snmp-uhv6ZDeF",
        "defects": [
          "CSCwh31469"
        ],
        "discovery": "EXTERNAL"
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device.\r\n\r This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests."
          }
        ],
        "id": "CVE-2024-20319",
        "lastModified": "2024-03-13T18:15:58.530",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "ykramarz@cisco.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2024-03-13T17:15:48.003",
        "references": [
          {
            "source": "ykramarz@cisco.com",
            "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF"
          }
        ],
        "sourceIdentifier": "ykramarz@cisco.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-284"
              }
            ],
            "source": "ykramarz@cisco.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Cisco Internetwork Operating System (IOS) ist ein Betriebssystem, das f\u00fcr Cisco Ger\u00e4te wie z. B. Router und Switches eingesetzt wird.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsma\u00dfnahmen zu umgehen oder seine Privilegien zu erweitern.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- CISCO Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2024-0631 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0631.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2024-0631 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-0631"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-acl-bypass-RZU5NL3e"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dhcp-dos-3tgPKRdm"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pppma-JKWFgneW"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-scp-dos-kb6sUUHw"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ssh-privesc-eWDMKew3"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2024-03-13",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrl2vpn-jesrU3fc"
      }
    ],
    "source_lang": "en-US",
    "title": "Cisco IOS XR: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2024-11-24T23:00:00.000+00:00",
      "generator": {
        "date": "2024-11-25T09:15:37.975+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.8"
        }
      },
      "id": "WID-SEC-W-2024-0631",
      "initial_release_date": "2024-03-13T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2024-03-13T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2024-11-24T23:00:00.000+00:00",
          "number": "2",
          "summary": "Produktzuordnung \u00fcberpr\u00fcft"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c7.9.2",
                "product": {
                  "name": "Cisco IOS XR \u003c7.9.2",
                  "product_id": "T033474"
                }
              },
              {
                "category": "product_version",
                "name": "7.9.2",
                "product": {
                  "name": "Cisco IOS XR 7.9.2",
                  "product_id": "T033474-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.9.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.10.1",
                "product": {
                  "name": "Cisco IOS XR \u003c7.10.1",
                  "product_id": "T033475"
                }
              },
              {
                "category": "product_version",
                "name": "7.10.1",
                "product": {
                  "name": "Cisco IOS XR 7.10.1",
                  "product_id": "T033475-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.10.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c24.1.1",
                "product": {
                  "name": "Cisco IOS XR \u003c24.1.1",
                  "product_id": "T033476"
                }
              },
              {
                "category": "product_version",
                "name": "24.1.1",
                "product": {
                  "name": "Cisco IOS XR 24.1.1",
                  "product_id": "T033476-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:24.1.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.10.2",
                "product": {
                  "name": "Cisco IOS XR \u003c7.10.2",
                  "product_id": "T033477"
                }
              },
              {
                "category": "product_version",
                "name": "7.10.2",
                "product": {
                  "name": "Cisco IOS XR 7.10.2",
                  "product_id": "T033477-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.10.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.11.1",
                "product": {
                  "name": "Cisco IOS XR \u003c7.11.1",
                  "product_id": "T033478"
                }
              },
              {
                "category": "product_version",
                "name": "7.11.1",
                "product": {
                  "name": "Cisco IOS XR 7.11.1",
                  "product_id": "T033478-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.11.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.9.21",
                "product": {
                  "name": "Cisco IOS XR \u003c7.9.21",
                  "product_id": "T033479"
                }
              },
              {
                "category": "product_version",
                "name": "7.9.21",
                "product": {
                  "name": "Cisco IOS XR 7.9.21",
                  "product_id": "T033479-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.9.21"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.11.2",
                "product": {
                  "name": "Cisco IOS XR \u003c7.11.2",
                  "product_id": "T033481"
                }
              },
              {
                "category": "product_version",
                "name": "7.11.2",
                "product": {
                  "name": "Cisco IOS XR 7.11.2",
                  "product_id": "T033481-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:7.11.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "IOS XR"
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-20262",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Cisco IOS XR. Dieser Fehler besteht im Secure Copy Protocol (SCP) und der SFTP-Funktion aufgrund einer fehlenden Validierung der SCP- und SFTP-CLI-Eingabeparameter. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, indem er sich am Ger\u00e4t authentifiziert und SCP- oder SFTP-CLI-Befehle mit bestimmten Parametern ausgibt, um einen Denial-of-Service-Zustand zu verursachen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033478",
          "T033475",
          "T033476",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20262"
    },
    {
      "cve": "CVE-2024-20266",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Cisco IOS XR. Dieser Fehler besteht in der DHCP Version 4 (DHCPv4) Serverfunktion, da bestimmte DHCPv4-Meldungen bei der Verarbeitung nicht ordnungsgem\u00e4\u00df validiert werden. Durch das Senden einer fehlerhaften DHCPv4-Meldung an ein betroffenes Ger\u00e4t kann ein entfernter, anonymer Angreifer diese Schwachstelle ausnutzen, um einen Denial-of-Service-Zustand zu verursachen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033478",
          "T033475",
          "T033476",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20266"
    },
    {
      "cve": "CVE-2024-20315",
      "notes": [
        {
          "category": "description",
          "text": "Es bestehen mehrere Schwachstellen in Cisco IOS XR. Diese Fehler bestehen in der IP-Zugangskontrollliste (ACL) aufgrund einer unsachgem\u00e4\u00dfen Zuweisung von Nachschlageschl\u00fcsseln zu internen Schnittstellenkontexten. Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033478",
          "T033481",
          "T033475",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20315"
    },
    {
      "cve": "CVE-2024-20322",
      "notes": [
        {
          "category": "description",
          "text": "Es bestehen mehrere Schwachstellen in Cisco IOS XR. Diese Fehler bestehen in der IP-Zugangskontrollliste (ACL) aufgrund einer unsachgem\u00e4\u00dfen Zuweisung von Nachschlageschl\u00fcsseln zu internen Schnittstellenkontexten. Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033478",
          "T033481",
          "T033475",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20322"
    },
    {
      "cve": "CVE-2024-20318",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Cisco IOS XR. Dieser Fehler besteht in den Layer-2-Ethernet-Diensten aufgrund der falschen Behandlung bestimmter Ethernet-Frames. Ein benachbarter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um einen Denial-of-Service-Zustand zu verursachen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033475",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20318"
    },
    {
      "cve": "CVE-2024-20319",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Cisco IOS XR. Dieser Fehler besteht im UDP-Weiterleitungscode aufgrund einer falschen UDP-Weiterleitungsprogrammierung bei der Verwendung von SNMP mit Management-Plane-Schutz. Durch den Versuch, einen SNMP-Vorgang mit Broadcast als Zieladresse durchzuf\u00fchren, kann ein benachbarter, anonymer Angreifer diese Schwachstelle ausnutzen, um konfigurierte Schutzrichtlinien f\u00fcr die Verwaltungsebene zu umgehen und auf den SNMP-Server (Simple Network Management Plane) zuzugreifen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033478",
          "T033481",
          "T033475",
          "T033476",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20319"
    },
    {
      "cve": "CVE-2024-20320",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Cisco IOS XR. Dieser Fehler besteht in der SSH-Client-Funktion aufgrund einer unzureichenden Validierung von Argumenten, die im SSH-Client-CLI-Befehl enthalten sind. Durch die Ausgabe eines manipulierten SSH-Client-Befehls an die CLI kann ein lokaler Angreifer diese Schwachstelle ausnutzen, um seine Privilegien zu erweitern."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033477",
          "T033475",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20320"
    },
    {
      "cve": "CVE-2024-20327",
      "notes": [
        {
          "category": "description",
          "text": "There is a vulnerability in Cisco IOS XR. This flaw exists in the PPP over Ethernet (PPPoE) termination feature due to the improper handling of malformed PPPoE packets. By sending a crafted PPPoE packet to an affected line card interface, an adjacent, anonymous attacker can exploit this vulnerability to cause a Denial of Service condition."
        }
      ],
      "product_status": {
        "known_affected": [
          "T033479",
          "T033478",
          "T033475",
          "T033474"
        ]
      },
      "release_date": "2024-03-13T23:00:00.000+00:00",
      "title": "CVE-2024-20327"
    }
  ]
}

{
  "affected": [],
  "aliases": [
    "CVE-2024-20319"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-13T17:15:48Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device.\n\n This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.",
  "id": "GHSA-936v-x9xm-gc22",
  "modified": "2024-03-13T18:31:36Z",
  "published": "2024-03-13T18:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-20319"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found during the resolution of a Cisco TAC support case."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device.\r\n\r\nThis vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.\r\n\r\nCisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the March 2024 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75299\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "At the time of publication, this vulnerability affected Cisco devices if they were running a vulnerable release of Cisco IOS XR Software and had management plane protection configured with the SNMP server enabled.\r\n\r\nFor information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software [\"#fs\"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nDetermine Whether Management Plane Protection is Configured\r\n\r\nTo determine whether management plane protection is configured, enter the command show running-config control-plane management-plane. If the command returns output, management plane protection is configured, as shown in the following example:\r\n\r\n\r\nRouter# show running-config control-plane management-plane\r\n!\r\ncontrol-plane\r\n management-plane\r\n  inband\r\n   interface all\r\n  allow SSH\r\n   !\r\n  !\r\n !\r\n!\r\nRouter#\r\n\r\nDetermine Whether SNMP Server is Configured\r\n\r\nTo determine whether the SNMP server is configured, enter the command show running-config snmp. The device can be configured with either SNMPv2c or SNMPv3. If the command returns output, SNMP server is configured, as shown in the following example:\r\nRouter# show running-config snmp-server\r\n!\r\nsnmp-server community example RO\r\n!\r\nRouter#",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect the following Cisco products:\r\n\r\nIOS Software\r\nIOS XE Software\r\nNX-OS Software",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "Exploitation of this vulnerability could allow an attacker to bypass protections that are provided by an access control list (ACL) that is applied on an affected device. The overall impact of exploitation is organization-specific because it depends on the importance of the assets that the ACL was supposed to protect. Customers should evaluate how exploitation of this vulnerability would impact their network and proceed according to their own vulnerability-handling and remediation processes.",
        "title": "Details"
      },
      {
        "category": "general",
        "text": "There is a workaround that addresses this vulnerability.\r\n\r\nDisable UDP forwarding\r\n\r\nUDP forwarding is enabled by default for DNS, TFTP, TACACS, IEN 116 Name Service, NetBIOS Name Service (NBNS), and NetBIOS Datagram Service (NBDS) protocols. UDP forwarding is not enabled by default for other UDP protocols.\r\n\r\nIf UDP forwarding is not required, a workaround is to disable UDP forwarding globally by using the forward-protocol udp disable command as shown in the following example:\r\n\r\n\r\nRP/0/RSP0/CPU0:ios#configure terminal\r\nRP/0/RSP0/CPU0:ios(config)#forward-protocol udp disable\r\nRP/0/RSP0/CPU0:ios(config)#commit\r\n\r\nNote: If UDP broadcast forwarding is required for any default protocol or if UDP broadcast forwarding has been configured with the forward-protocol udp \u003cport number\u003e command, this workaround cannot be used.\r\n\r\nWhile this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "When considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n      Fixed Releases\r\nAt the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability described in this advisory and which release included the fix for this vulnerability.\r\n\r\n        Cisco IOS XR Software Release  First Fixed Release          7.11 and earlier  Migrate to a fixed release.      24.1  24.1.1\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.\r\n\r\nCisco has not released SMUs to address this vulnerability.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This vulnerability was found during the resolution of a Cisco TAC support case.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@cisco.com",
      "issuing_authority": "Cisco PSIRT",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco IOS XR Software SNMP Management Plane Protection ACL Bypass Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: March 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75299"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco IOS XR Software SNMP Management Plane Protection ACL Bypass Vulnerability",
    "tracking": {
      "current_release_date": "2024-03-13T16:00:00+00:00",
      "generator": {
        "date": "2024-05-10T23:29:25+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-snmp-uhv6ZDeF",
      "initial_release_date": "2024-03-13T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2024-03-13T15:56:41+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco IOS XR Software",
            "product": {
              "name": "Cisco IOS XR Software ",
              "product_id": "CSAFPID-5834"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-20319",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwh31469"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-5834"
        ]
      },
      "release_date": "2024-03-13T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-5834"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-5834"
          ]
        }
      ],
      "title": "Cisco IOS XR Software SNMP Management Plane Protection ACL Bypass Vulnerability"
    }
  ]
}