Security advisory

{
  "id": "4290dafdc6aa3959b71cdd9029ceda574c128d45e6c1dc25d9b47b1472e2700b",
  "url": "https://osv.dev/vulnerability/CVE-2018-17205",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-17205",
    "summary": "An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting ofproto_rule_insert__ in ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order. If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries to revert back all previous flows that were successfully applied from the same bundle. This is possible since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.",
    "evidence": "osv:CVE-2018-17205",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-17205",
      "aliases": [
        "CVE-2018-17205"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openvswitch/ovs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c298ef781c2d35d939fe163cbc2f41ea7b1cb8d1"
                },
                {
                  "last_affected": "a3830aae25911fef587c08f7301b4665ecc17ae1"
                },
                {
                  "fixed": "0befd1f3745055c32940f5faf9559be6a14395e6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.7.0"
                      },
                      {
                        "last_affected": "2.7.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0befd1f3745055c32940f5faf9559be6a14395e6"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.7.6",
            "v2.7.5",
            "v2.7.4",
            "v2.7.3",
            "v2.7.2",
            "v2.7.1",
            "v2.7.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17205.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-17205-521ca786",
                "digest": {
                  "length": 635,
                  "function_hash": "296793816368908415124423156711142915229"
                },
                "source": "https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6",
                "target": {
                  "file": "ofproto/ofproto.c",
                  "function": "OVS_REQUIRES"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-17205-d9dee87d",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "324698912704317781727387435567405361116",
                    "283746464532435123262341333630193130071",
                    "265313777273314482722288888198760625849",
                    "257855558402792822871862028655627297586"
                  ]
                },
                "source": "https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6",
                "target": {
                  "file": "ofproto/ofproto.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:29:20Z"
          }
        }
      ],
      "modified": "2026-10-20T13:29:20.083505637Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2018:3500",
        "https://access.redhat.com/errata/RHSA-2019:0053",
        "https://access.redhat.com/errata/RHSA-2019:0081",
        "https://usn.ubuntu.com/3873-1/",
        "https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*",
              "cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:openstack",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10"
                  },
                  {
                    "last_affected": "10"
                  },
                  {
                    "introduced": "13"
                  },
                  {
                    "last_affected": "13"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-17205",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387736,
  "published_at": "2018-09-19T16:29:01.003+00:00"
}