var-199907-0025
Vulnerability from variot

Firewall-1 sets a long timeout for connections that begin with ACK or other packets except SYN, allowing an attacker to conduct a denial of service via a large number of connection attempts to unresponsive systems. A denial of service condition exists in some implementations of Firewall-1 by Checkpoint Software. This denial of service attack is possible due to the way Firewall-1 handles TCP connections. Typically to initiate a TCP connection, a SYN packet is sent to the destination host. On systems where Firewall-1 is installed, this packet is first passed through an internal stack maintained by the Firewall before it is passed onto the operating system's native stack. When Firewall-1 filters this packet, it checks it against the rule base. If the session is allowed where it's rulebase is concerned, it is added to the connections table with a timeout of 60 seconds. When the remote host responds with an ACK (Acknowledge) packet, the session is bumped up to a 3600 second timeout. However, if you initiate a connection with an ACK packet, Firewall-1 compares it against the rule base, if allowed it is added to the connections table. However, the timeout is set to 3600 seconds and does not care if a remote system responds. You now have a session with a 1 hour timeout, even though no system responded. If this is done with a large amount of ACK packets, it will result in a full connections table. This results in your Firewall-1 refusing subsequent connections from any source effectively rendering the Firewall-1 useless in a 'failed closed' state

Show details on source website

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-199907-0025",
  "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": "firewall-1",
        "scope": "eq",
        "trust": 1.6,
        "vendor": "checkpoint",
        "version": "4.0"
      },
      {
        "model": "firewall-1",
        "scope": "eq",
        "trust": 1.6,
        "vendor": "checkpoint",
        "version": "3.0"
      },
      {
        "model": "point software firewall-1",
        "scope": "eq",
        "trust": 0.3,
        "vendor": "check",
        "version": "4.0"
      },
      {
        "model": "point software firewall-1",
        "scope": "eq",
        "trust": 0.3,
        "vendor": "check",
        "version": "3.0"
      }
    ],
    "sources": [
      {
        "db": "BID",
        "id": "549"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "credits": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/credits#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "This problem was discovered and documented by Lance Spitzner \u003clance@spitzner.net\u003e. This discovery was posted by Lance to the Bugtraq mailing list on Thu, 29 Jul 1999. Both the discussion and exploit section of this Vulnerability were almost wholly derived",
    "sources": [
      {
        "db": "BID",
        "id": "549"
      }
    ],
    "trust": 0.3
  },
  "cve": "CVE-1999-0770",
  "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": [
          {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "author": "nvd@nist.gov",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.1,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 3.9,
            "id": "CVE-1999-0770",
            "impactScore": 2.9,
            "integrityImpact": "NONE",
            "severity": "LOW",
            "trust": 1.0,
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "author": "VULHUB",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.1,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 3.9,
            "id": "VHN-751",
            "impactScore": 2.9,
            "integrityImpact": "NONE",
            "severity": "LOW",
            "trust": 0.1,
            "vectorString": "AV:L/AC:L/AU:N/C:N/I:N/A:P",
            "version": "2.0"
          }
        ],
        "cvssV3": [],
        "severity": [
          {
            "author": "nvd@nist.gov",
            "id": "CVE-1999-0770",
            "trust": 1.0,
            "value": "LOW"
          },
          {
            "author": "CNNVD",
            "id": "CNNVD-199907-034",
            "trust": 0.6,
            "value": "LOW"
          },
          {
            "author": "VULHUB",
            "id": "VHN-751",
            "trust": 0.1,
            "value": "LOW"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "description": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/description#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "Firewall-1 sets a long timeout for connections that begin with ACK or other packets except SYN, allowing an attacker to conduct a denial of service via a large number of connection attempts to unresponsive systems. A denial of service condition exists in some implementations of Firewall-1 by Checkpoint Software. This denial of service attack is possible due to the way Firewall-1 handles TCP connections. \nTypically to initiate a TCP connection, a SYN packet is sent to the destination host. On systems where Firewall-1 is installed, this packet is first passed through an internal stack maintained by the Firewall before it is passed onto the operating system\u0027s native stack. When Firewall-1 filters this packet, it checks it against the rule base. If the session is allowed where it\u0027s rulebase is concerned, it is added to the connections table with a timeout of 60 seconds. When the remote host responds with an ACK (Acknowledge) packet, the session is bumped up to a 3600 second timeout. \nHowever, if you initiate a connection with an ACK packet, Firewall-1 compares it against the rule base, if allowed it is added to the connections table. However, the timeout is set to 3600 seconds and does not care if a remote system responds. You now have a session with a 1 hour timeout, even though no system responded. If this is done with a large amount of ACK packets, it will result in a full connections table. This results in your Firewall-1 refusing subsequent connections from any source effectively rendering the Firewall-1 useless in a \u0027failed closed\u0027 state",
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      },
      {
        "db": "BID",
        "id": "549"
      },
      {
        "db": "VULHUB",
        "id": "VHN-751"
      }
    ],
    "trust": 1.26
  },
  "exploit_availability": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/exploit_availability#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "reference": "https://www.scap.org.cn/vuln/vhn-751",
        "trust": 0.1,
        "type": "unknown"
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-751"
      }
    ]
  },
  "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": "BID",
        "id": "549",
        "trust": 2.0
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770",
        "trust": 1.7
      },
      {
        "db": "OSVDB",
        "id": "1027",
        "trust": 1.7
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034",
        "trust": 0.7
      },
      {
        "db": "EXPLOIT-DB",
        "id": "19436",
        "trust": 0.1
      },
      {
        "db": "VULHUB",
        "id": "VHN-751",
        "trust": 0.1
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "db": "BID",
        "id": "549"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "id": "VAR-199907-0025",
  "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-751"
      }
    ],
    "trust": 0.01
  },
  "last_update_date": "2024-11-22T23:00:11.957000Z",
  "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-1999-0770"
      }
    ]
  },
  "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": 2.7,
        "url": "http://www.securityfocus.com/bid/549"
      },
      {
        "trust": 2.7,
        "url": "http://www.osvdb.org/1027"
      },
      {
        "trust": 0.3,
        "url": "http://www.enteract.com/~lspitz/fwtable.html"
      },
      {
        "trust": 0.3,
        "url": "http://www.phoneboy.com/fw1/faq/0289.html"
      },
      {
        "trust": 0.1,
        "url": ""
      }
    ],
    "sources": [
      {
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "db": "BID",
        "id": "549"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "sources": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "db": "BID",
        "id": "549"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "sources_release_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_release_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "1999-07-29T00:00:00",
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "date": "1999-07-29T00:00:00",
        "db": "BID",
        "id": "549"
      },
      {
        "date": "1999-07-29T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "date": "1999-07-29T04:00:00",
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "sources_update_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_update_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2008-09-09T00:00:00",
        "db": "VULHUB",
        "id": "VHN-751"
      },
      {
        "date": "1999-07-29T00:00:00",
        "db": "BID",
        "id": "549"
      },
      {
        "date": "2005-05-02T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      },
      {
        "date": "2024-11-20T23:29:25.823000",
        "db": "NVD",
        "id": "CVE-1999-0770"
      }
    ]
  },
  "threat_type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/threat_type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "local",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      }
    ],
    "trust": 0.6
  },
  "title": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/title#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "Firewall-1 Denial of service vulnerability",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      }
    ],
    "trust": 0.6
  },
  "type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "unknown",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-199907-034"
      }
    ],
    "trust": 0.6
  }
}


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 seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.