CVE-2016-6817 (GCVE-0-2016-6817)

Vulnerability from cvelistv5 – Published: 2017-08-10 22:00 – Updated: 2024-10-15 19:01
VLAI
Summary
The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-15 17:30 UTC
CWE
  • Denial of Service
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1085 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Tomcat Affected: 9.0.0.M1 to 9.0.0.M11
Affected: 8.5.0 to 8.5.6
guessed Create a notification for this product.
Date Public
2016-11-22 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T01:43:37.979Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "1037330",
            "tags": [
              "vdb-entry",
              "x_refsource_SECTRACK",
              "x_transferred"
            ],
            "url": "http://www.securitytracker.com/id/1037330"
          },
          {
            "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
          },
          {
            "name": "94462",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/94462"
          },
          {
            "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2016-6817",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-15T17:30:17.261626Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-835",
                "description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-15T19:01:10.556Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.0.M1 to 9.0.0.M11"
            },
            {
              "status": "affected",
              "version": "8.5.0 to 8.5.6"
            }
          ]
        }
      ],
      "datePublic": "2016-11-22T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Denial of Service",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-04-15T15:06:09.000Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "name": "1037330",
          "tags": [
            "vdb-entry",
            "x_refsource_SECTRACK"
          ],
          "url": "http://www.securitytracker.com/id/1037330"
        },
        {
          "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
        },
        {
          "name": "94462",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/94462"
        },
        {
          "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
        },
        {
          "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
        },
        {
          "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
        },
        {
          "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@apache.org",
          "DATE_PUBLIC": "2016-11-22T00:00:00",
          "ID": "CVE-2016-6817",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Apache Tomcat",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "9.0.0.M1 to 9.0.0.M11"
                          },
                          {
                            "version_value": "8.5.0 to 8.5.6"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Apache Software Foundation"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Denial of Service"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "1037330",
              "refsource": "SECTRACK",
              "url": "http://www.securitytracker.com/id/1037330"
            },
            {
              "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a@%3Cannounce.tomcat.apache.org%3E"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20180607-0001/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
            },
            {
              "name": "94462",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/94462"
            },
            {
              "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551@%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc@%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a@%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3@%3Cdev.tomcat.apache.org%3E"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2016-6817",
    "datePublished": "2017-08-10T22:00:00.000Z",
    "dateReserved": "2016-08-12T00:00:00.000Z",
    "dateUpdated": "2024-10-15T19:01:10.556Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2016-6817",
      "date": "2026-10-28",
      "epss": "0.0719",
      "percentile": "0.94279"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "69A7FC28-A0EC-4516-9776-700343D2F4DB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "18814653-6D44-47D9-A2F5-89C5AFB255F8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D4D811A9-4988-4C11-AA27-F5BE2B93D8D4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.3:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FAEF824D-7E95-4BC1-8DBB-787DCE595E21",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.4:*:*:*:*:*:*:*",
                    "matchCriteriaId": "97F4A2B3-DB1D-4D0B-B5FF-7EE2A0D291BB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.5:*:*:*:*:*:*:*",
                    "matchCriteriaId": "0B461D5A-1208-498F-B551-46C6D514AC2B",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:8.5.6:*:*:*:*:*:*:*",
                    "matchCriteriaId": "598E5D91-0165-4D55-9EDD-EBB5AAAD1172",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*",
                    "matchCriteriaId": "9D0689FE-4BC0-4F53-8C79-34B21F9B86C2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*",
                    "matchCriteriaId": "89B129B2-FB6F-4EF9-BF12-E589A87996CF",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*",
                    "matchCriteriaId": "8B6787B6-54A8-475E-BA1C-AB99334B2535",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:*",
                    "matchCriteriaId": "9F542E12-6BA8-4504-A494-DA83E7E19BD5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:*",
                    "matchCriteriaId": "C0C5F004-F7D8-45DB-B173-351C50B0EC16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:*",
                    "matchCriteriaId": "D1902D2E-1896-4D3D-9E1C-3A675255072C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*",
                    "matchCriteriaId": "49AAF4DF-F61D-47A8-8788-A21E317A145D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:*",
                    "matchCriteriaId": "454211D0-60A2-4661-AECA-4C0121413FEB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:*",
                    "matchCriteriaId": "0686F977-889F-4960-8E0B-7784B73A7F2D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:*",
                    "matchCriteriaId": "558703AE-DB5E-4DFF-B497-C36694DD7B24",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:*",
                    "matchCriteriaId": "ED6273F2-1165-47A4-8DD7-9E9B2472941B",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible."
          },
          {
            "lang": "es",
            "value": "El parser de cabecera HTTP/2 en Apache Tomcat en sus versiones 9.0.0.M1 a 9.0.0.M11 y 8.5.0 a 8.5.6 entraba en un bucle infinito si la cabecera recibida era mayor que el b\u00fafer disponible. Esto hizo que fuese posible realizar un ataque de denegaci\u00f3n de servicio."
          }
        ],
        "id": "CVE-2016-6817",
        "lastModified": "2026-05-13T00:24:29.033",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": true,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ]
        },
        "published": "2017-08-10T22:29:00.233",
        "references": [
          {
            "source": "security@apache.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/94462"
          },
          {
            "source": "security@apache.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1037330"
          },
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
          },
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "security@apache.org",
            "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/94462"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1037330"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-119"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-835"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-04T18:41:56+00:00",
      "cve": "CVE-2016-6817",
      "id": "CVE-2016-6817",
      "initial_release_date": "2016-11-22T00:00:00+00:00",
      "product_status:known_not_affected": "6",
      "product_status:under_investigation": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tomcat: Infinite loop in HTTP/2 header parser",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-6817.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-06T01:43:37.979Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "name": "1037330",
                "tags": [
                  "vdb-entry",
                  "x_refsource_SECTRACK",
                  "x_transferred"
                ],
                "url": "http://www.securitytracker.com/id/1037330"
              },
              {
                "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
                "tags": [
                  "mailing-list",
                  "x_refsource_MLIST",
                  "x_transferred"
                ],
                "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
              },
              {
                "tags": [
                  "x_refsource_CONFIRM",
                  "x_transferred"
                ],
                "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
              },
              {
                "name": "94462",
                "tags": [
                  "vdb-entry",
                  "x_refsource_BID",
                  "x_transferred"
                ],
                "url": "http://www.securityfocus.com/bid/94462"
              },
              {
                "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
                "tags": [
                  "mailing-list",
                  "x_refsource_MLIST",
                  "x_transferred"
                ],
                "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
              },
              {
                "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
                "tags": [
                  "mailing-list",
                  "x_refsource_MLIST",
                  "x_transferred"
                ],
                "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
              },
              {
                "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
                "tags": [
                  "mailing-list",
                  "x_refsource_MLIST",
                  "x_transferred"
                ],
                "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
              },
              {
                "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
                "tags": [
                  "mailing-list",
                  "x_refsource_MLIST",
                  "x_transferred"
                ],
                "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "HIGH",
                  "baseScore": 7.5,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2016-6817",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-10-15T17:30:17.261626Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-835",
                    "description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-10-15T18:25:43.414Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "Apache Tomcat",
              "vendor": "Apache Software Foundation",
              "versions": [
                {
                  "status": "affected",
                  "version": "9.0.0.M1 to 9.0.0.M11"
                },
                {
                  "status": "affected",
                  "version": "8.5.0 to 8.5.6"
                }
              ]
            }
          ],
          "datePublic": "2016-11-22T00:00:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "value": "The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "Denial of Service",
                  "lang": "en",
                  "type": "text"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2019-04-15T15:06:09.000Z",
            "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
            "shortName": "apache"
          },
          "references": [
            {
              "name": "1037330",
              "tags": [
                "vdb-entry",
                "x_refsource_SECTRACK"
              ],
              "url": "http://www.securitytracker.com/id/1037330"
            },
            {
              "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
              "tags": [
                "mailing-list",
                "x_refsource_MLIST"
              ],
              "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a%40%3Cannounce.tomcat.apache.org%3E"
            },
            {
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
            },
            {
              "name": "94462",
              "tags": [
                "vdb-entry",
                "x_refsource_BID"
              ],
              "url": "http://www.securityfocus.com/bid/94462"
            },
            {
              "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
              "tags": [
                "mailing-list",
                "x_refsource_MLIST"
              ],
              "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
              "tags": [
                "mailing-list",
                "x_refsource_MLIST"
              ],
              "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
              "tags": [
                "mailing-list",
                "x_refsource_MLIST"
              ],
              "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"
            },
            {
              "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
              "tags": [
                "mailing-list",
                "x_refsource_MLIST"
              ],
              "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E"
            }
          ],
          "x_legacyV4Record": {
            "CVE_data_meta": {
              "ASSIGNER": "security@apache.org",
              "DATE_PUBLIC": "2016-11-22T00:00:00",
              "ID": "CVE-2016-6817",
              "STATE": "PUBLIC"
            },
            "affects": {
              "vendor": {
                "vendor_data": [
                  {
                    "product": {
                      "product_data": [
                        {
                          "product_name": "Apache Tomcat",
                          "version": {
                            "version_data": [
                              {
                                "version_value": "9.0.0.M1 to 9.0.0.M11"
                              },
                              {
                                "version_value": "8.5.0 to 8.5.6"
                              }
                            ]
                          }
                        }
                      ]
                    },
                    "vendor_name": "Apache Software Foundation"
                  }
                ]
              }
            },
            "data_format": "MITRE",
            "data_type": "CVE",
            "data_version": "4.0",
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible."
                }
              ]
            },
            "problemtype": {
              "problemtype_data": [
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "Denial of Service"
                    }
                  ]
                }
              ]
            },
            "references": {
              "reference_data": [
                {
                  "name": "1037330",
                  "refsource": "SECTRACK",
                  "url": "http://www.securitytracker.com/id/1037330"
                },
                {
                  "name": "[announce] 20161122 [SECURITY] CVE-2016-6817 Apache Tomcat Denial of Service",
                  "refsource": "MLIST",
                  "url": "https://lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a75e32a@%3Cannounce.tomcat.apache.org%3E"
                },
                {
                  "name": "https://security.netapp.com/advisory/ntap-20180607-0001/",
                  "refsource": "CONFIRM",
                  "url": "https://security.netapp.com/advisory/ntap-20180607-0001/"
                },
                {
                  "name": "94462",
                  "refsource": "BID",
                  "url": "http://www.securityfocus.com/bid/94462"
                },
                {
                  "name": "[tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/",
                  "refsource": "MLIST",
                  "url": "https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551@%3Cdev.tomcat.apache.org%3E"
                },
                {
                  "name": "[tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/",
                  "refsource": "MLIST",
                  "url": "https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc@%3Cdev.tomcat.apache.org%3E"
                },
                {
                  "name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/",
                  "refsource": "MLIST",
                  "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a@%3Cdev.tomcat.apache.org%3E"
                },
                {
                  "name": "[tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/",
                  "refsource": "MLIST",
                  "url": "https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3@%3Cdev.tomcat.apache.org%3E"
                }
              ]
            }
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "assignerShortName": "apache",
        "cveId": "CVE-2016-6817",
        "datePublished": "2017-08-10T22:00:00.000Z",
        "dateReserved": "2016-08-12T00:00:00.000Z",
        "dateUpdated": "2024-10-15T19:01:10.556Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.