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High

Security advisory

Type: advisorySources: OSVCVE: CVE-2019-0190

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2019-0190
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 05:22 UTC · Revision 1

Source evidence

CVE-2019-0190

core-osv · Original source

Published 30 Jan 2019, 22:29 UTC

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.

osv:CVE-2019-0190
Complete source record
{
  "id": "0f6c374f918e62241279ffd1fd9df8327c1c513cfc49594bab80f576f3625e65",
  "url": "https://osv.dev/vulnerability/CVE-2019-0190",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-0190",
    "summary": "A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.",
    "evidence": "osv:CVE-2019-0190",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-0190",
      "aliases": [
        "CVE-2019-0190"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/httpd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6431bbb0da47dd984110dc32728a84e5cc990313"
                },
                {
                  "last_affected": "6431bbb0da47dd984110dc32728a84e5cc990313"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:http_server:2.4.37:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.37"
                      },
                      {
                        "last_affected": "2.4.37"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.37"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-0190.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:27.792651055Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E",
        "https://www.oracle.com//security-alerts/cpujul2021.html",
        "https://httpd.apache.org/security/vulnerabilities_24.html",
        "https://security.gentoo.org/glsa/201903-21",
        "https://security.netapp.com/advisory/ntap-20190125-0001/",
        "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
        "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:enterprise_manager_ops_center",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.3.3"
                  },
                  {
                    "last_affected": "12.3.3"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:hospitality_guest_access:4.2.1:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:hospitality_guest_access",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.2.0"
                  },
                  {
                    "last_affected": "4.2.0"
                  },
                  {
                    "introduced": "4.2.1"
                  },
                  {
                    "last_affected": "4.2.1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:instantis_enterprisetrack",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "17.1"
                  },
                  {
                    "last_affected": "17.1"
                  },
                  {
                    "introduced": "17.2"
                  },
                  {
                    "last_affected": "17.2"
                  },
                  {
                    "introduced": "17.3"
                  },
                  {
                    "last_affected": "17.3"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:retail_xstore_point_of_service:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:retail_xstore_point_of_service",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  },
                  {
                    "introduced": "7.1"
                  },
                  {
                    "last_affected": "7.1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-0190",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431900,
  "published_at": "2019-01-30T22:29:00.497+00:00"
}