Vulnerability-Lookup

VAR-202109-0244

Vulnerability from variot - Updated: 2023-12-18 11:16

A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming. Pillow is a Python-based image processing library. There is currently no information about this vulnerability, please feel free to follow CNNVD or manufacturer announcements

Show details on source website

JSON

To clipboard

{
  "@context": {
    "@vocab": "https://www.variotdbs.pl/ref/VARIoTentry#",
    "affected_products": {
      "@id": "https://www.variotdbs.pl/ref/affected_products"
    },
    "configurations": {
      "@id": "https://www.variotdbs.pl/ref/configurations"
    },
    "credits": {
      "@id": "https://www.variotdbs.pl/ref/credits"
    },
    "cvss": {
      "@id": "https://www.variotdbs.pl/ref/cvss/"
    },
    "description": {
      "@id": "https://www.variotdbs.pl/ref/description/"
    },
    "exploit_availability": {
      "@id": "https://www.variotdbs.pl/ref/exploit_availability/"
    },
    "external_ids": {
      "@id": "https://www.variotdbs.pl/ref/external_ids/"
    },
    "iot": {
      "@id": "https://www.variotdbs.pl/ref/iot/"
    },
    "iot_taxonomy": {
      "@id": "https://www.variotdbs.pl/ref/iot_taxonomy/"
    },
    "patch": {
      "@id": "https://www.variotdbs.pl/ref/patch/"
    },
    "problemtype_data": {
      "@id": "https://www.variotdbs.pl/ref/problemtype_data/"
    },
    "references": {
      "@id": "https://www.variotdbs.pl/ref/references/"
    },
    "sources": {
      "@id": "https://www.variotdbs.pl/ref/sources/"
    },
    "sources_release_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_release_date/"
    },
    "sources_update_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_update_date/"
    },
    "threat_type": {
      "@id": "https://www.variotdbs.pl/ref/threat_type/"
    },
    "title": {
      "@id": "https://www.variotdbs.pl/ref/title/"
    },
    "type": {
      "@id": "https://www.variotdbs.pl/ref/type/"
    }
  },
  "@id": "https://www.variotdbs.pl/vuln/VAR-202109-0244",
  "affected_products": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/affected_products#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "model": "ios xe",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "cisco",
        "version": "17.6.1"
      }
    ],
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      }
    ]
  },
  "configurations": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/configurations#",
      "children": {
        "@container": "@list"
      },
      "cpe_match": {
        "@container": "@list"
      },
      "data": {
        "@container": "@list"
      },
      "nodes": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "17.6.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      }
    ]
  },
  "cve": "CVE-2021-1616",
  "cvss": {
    "@context": {
      "cvssV2": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV2#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV2"
      },
      "cvssV3": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV3#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV3/"
      },
      "severity": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/cvss/severity#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/severity"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "cvssV2": [
          {
            "acInsufInfo": false,
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "NVD",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 8.6,
            "impactScore": 2.9,
            "integrityImpact": "PARTIAL",
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "severity": "MEDIUM",
            "trust": 1.0,
            "userInteractionRequired": true,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "VULHUB",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 8.6,
            "id": "VHN-374670",
            "impactScore": 2.9,
            "integrityImpact": "PARTIAL",
            "severity": "MEDIUM",
            "trust": 0.1,
            "vectorString": "AV:N/AC:M/AU:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          {
            "acInsufInfo": null,
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "VULMON",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 8.6,
            "id": "CVE-2021-1616",
            "impactScore": 2.9,
            "integrityImpact": "PARTIAL",
            "obtainAllPrivilege": null,
            "obtainOtherPrivilege": null,
            "obtainUserPrivilege": null,
            "severity": "MEDIUM",
            "trust": 0.1,
            "userInteractionRequired": null,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          }
        ],
        "cvssV3": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "author": "NVD",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 2.8,
            "impactScore": 1.4,
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "trust": 2.0,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
            "version": "3.1"
          }
        ],
        "severity": [
          {
            "author": "NVD",
            "id": "CVE-2021-1616",
            "trust": 1.0,
            "value": "MEDIUM"
          },
          {
            "author": "ykramarz@cisco.com",
            "id": "CVE-2021-1616",
            "trust": 1.0,
            "value": "MEDIUM"
          },
          {
            "author": "CNNVD",
            "id": "CNNVD-202109-1561",
            "trust": 0.6,
            "value": "MEDIUM"
          },
          {
            "author": "CNNVD",
            "id": "CNNVD-202104-975",
            "trust": 0.6,
            "value": "MEDIUM"
          },
          {
            "author": "VULHUB",
            "id": "VHN-374670",
            "trust": 0.1,
            "value": "MEDIUM"
          },
          {
            "author": "VULMON",
            "id": "CVE-2021-1616",
            "trust": 0.1,
            "value": "MEDIUM"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "description": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/description#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming. Pillow is a Python-based image processing library. \nThere is currently no information about this vulnerability, please feel free to follow CNNVD or manufacturer announcements",
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      },
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      }
    ],
    "trust": 1.62
  },
  "external_ids": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/external_ids#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "db": "NVD",
        "id": "CVE-2021-1616",
        "trust": 1.8
      },
      {
        "db": "AUSCERT",
        "id": "ESB-2021.3180",
        "trust": 0.6
      },
      {
        "db": "CS-HELP",
        "id": "SB2021092412",
        "trust": 0.6
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561",
        "trust": 0.6
      },
      {
        "db": "CS-HELP",
        "id": "SB2021041363",
        "trust": 0.6
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975",
        "trust": 0.6
      },
      {
        "db": "VULHUB",
        "id": "VHN-374670",
        "trust": 0.1
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616",
        "trust": 0.1
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "id": "VAR-202109-0244",
  "iot": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/iot#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": true,
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      }
    ],
    "trust": 0.01
  },
  "last_update_date": "2023-12-18T11:16:22.878000Z",
  "patch": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/patch#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "title": "Cisco IOS XE Software Enter the fix for the verification error vulnerability",
        "trust": 0.6,
        "url": "http://123.124.177.30/web/xxk/bdxqbyid.tag?id=164740"
      },
      {
        "title": "Cisco: Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability",
        "trust": 0.1,
        "url": "https://vulmon.com/vendoradvisory?qidtp=cisco_security_advisories_and_alerts_ciscoproducts\u0026qid=cisco-sa-iosxe-h323alg-bypass-4vy2mp2q"
      }
    ],
    "sources": [
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      }
    ]
  },
  "problemtype_data": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/problemtype_data#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "problemtype": "NVD-CWE-Other",
        "trust": 1.0
      }
    ],
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      }
    ]
  },
  "references": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/references#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "trust": 2.5,
        "url": "https://tools.cisco.com/security/center/content/ciscosecurityadvisory/cisco-sa-iosxe-h323alg-bypass-4vy2mp2q"
      },
      {
        "trust": 0.6,
        "url": "https://vigilance.fr/vulnerability/cisco-ios-xe-ingress-filtrering-bypass-via-h-323-application-level-gateway-36500"
      },
      {
        "trust": 0.6,
        "url": "https://www.auscert.org.au/bulletins/esb-2021.3180"
      },
      {
        "trust": 0.6,
        "url": "https://www.cybersecurity-help.cz/vdb/sb2021092412"
      },
      {
        "trust": 0.6,
        "url": "https://nvd.nist.gov/vuln/detail/cve-2021-1616"
      },
      {
        "trust": 0.6,
        "url": "https://www.cybersecurity-help.cz/vdb/sb2021041363"
      },
      {
        "trust": 0.1,
        "url": "https://cwe.mitre.org/data/definitions/20.html"
      },
      {
        "trust": 0.1,
        "url": "https://nvd.nist.gov"
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "sources": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "sources_release_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_release_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2021-09-23T00:00:00",
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "date": "2021-09-23T00:00:00",
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "date": "2021-09-23T03:15:12.627000",
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "date": "2021-09-22T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "date": "2021-04-13T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "sources_update_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_update_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2022-10-24T00:00:00",
        "db": "VULHUB",
        "id": "VHN-374670"
      },
      {
        "date": "2021-10-07T00:00:00",
        "db": "VULMON",
        "id": "CVE-2021-1616"
      },
      {
        "date": "2023-11-07T03:28:47.623000",
        "db": "NVD",
        "id": "CVE-2021-1616"
      },
      {
        "date": "2022-10-26T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "date": "2021-04-14T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ]
  },
  "threat_type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/threat_type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "remote",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      }
    ],
    "trust": 0.6
  },
  "title": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/title#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "Cisco IOS XE Software Security hole",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      }
    ],
    "trust": 0.6
  },
  "type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "other",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202109-1561"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202104-975"
      }
    ],
    "trust": 1.2
  }
}

CVE-2021-1616 (GCVE-0-2021-1616)

Vulnerability from cvelistv5 – Published: 2021-09-23 02:30 – Updated: 2024-11-07 21:51

Title

Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability

Summary

Severity ?

4.7 (Medium)


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

CWE

CWE-693

Assigner

cisco

References

URL

Tags

https://tools.cisco.com/security/center/content/C…

vendor-advisoryx_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco IOS XE Software	Affected: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T16:18:10.302Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20210922 Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-1616",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-07T21:40:27.260275Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-07T21:51:40.735Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco IOS XE Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2021-09-22T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is aware that proof-of-concept exploit code is available for the vulnerability described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-23T02:30:50",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20210922 Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q"
        }
      ],
      "source": {
        "advisory": "cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q",
        "defect": [
          [
            "CSCvx16081"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2021-09-22T16:00:00",
          "ID": "CVE-2021-1616",
          "STATE": "PUBLIC",
          "TITLE": "Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco IOS XE Software",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Cisco"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "The Cisco Product Security Incident Response Team (PSIRT) is aware that proof-of-concept exploit code is available for the vulnerability described in this advisory."
          }
        ],
        "impact": {
          "cvss": {
            "baseScore": "4.7",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-693"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20210922 Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q",
          "defect": [
            [
              "CSCvx16081"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2021-1616",
    "datePublished": "2021-09-23T02:30:50.538291Z",
    "dateReserved": "2020-11-13T00:00:00",
    "dateUpdated": "2024-11-07T21:51:40.735Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

VAR-202109-0244

CVE-2021-1616 (GCVE-0-2021-1616)

Tags

Sightings

Nomenclature