Security advisory

{
  "id": "2bc72f233cf00944200425a85c782581552c7da8eb0c33d17f9f430dd218da45",
  "url": "https://osv.dev/vulnerability/CVE-2019-5885",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-5885",
    "summary": "Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.",
    "evidence": "osv:CVE-2019-5885",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-5885",
      "aliases": [
        "CVE-2019-5885",
        "GHSA-jrqm-v8cv-53ww",
        "PYSEC-2019-187"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/matrix-org/synapse",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2dd30ba827baaff0284e715b43f02224630d87cc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.34.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.34.0",
            "v0.34.0rc2",
            "v0.34.0rc1",
            "hhs-8",
            "hhs-7",
            "hhs-6",
            "hhs-5",
            "hhs-3",
            "hhs-2",
            "hhs-1",
            "v0.32.2",
            "v0.32.0",
            "v0.32.0rc1",
            "v0.28.0-rc1",
            "v0.25.0-rc1",
            "v0.23.0-rc2",
            "v0.23.0-rc1",
            "v0.18.5",
            "v0.18.4",
            "v0.18.3",
            "v0.18.2",
            "v0.18.1",
            "v0.18.0",
            "v0.17.3",
            "v0.17.2",
            "v0.17.1",
            "v0.17.0",
            "v0.16.1-r1",
            "v0.16.1",
            "v0.16.0",
            "v0.14.0",
            "v0.13.3",
            "v0.13.2",
            "v0.13.1",
            "v0.12.0",
            "v0.11.1",
            "v0.11.0-r2",
            "v0.11.0-r1",
            "v0.11.0",
            "v0.10.0-r2",
            "v0.10.0-r1",
            "v0.10.0",
            "v0.9.3",
            "v0.9.2-r2",
            "v0.9.2-r1",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0-r5",
            "v0.9.0-r4",
            "v0.9.0-r3",
            "v0.9.0-r2",
            "v0.9.0-r1",
            "v0.9.0",
            "v0.8.1-r4",
            "v0.8.1-r3",
            "v0.8.1-r2",
            "v0.8.1-r1",
            "v0.8.1",
            "v0.8.0",
            "v0.7.1-r4",
            "v0.7.1-r3",
            "v0.7.1-r2",
            "v0.7.1-r1",
            "v0.7.1",
            "v0.7.0f",
            "v0.7.0e",
            "v0.7.0d",
            "v0.7.0c",
            "v0.7.0b",
            "v0.7.0a",
            "v0.7.0",
            "v0.6.1f",
            "v0.6.1e",
            "v0.6.1d",
            "v0.6.1c",
            "v0.6.1b",
            "v0.6.1a",
            "v0.6.1",
            "v0.6.0b",
            "v0.6.0a",
            "v0.6.0",
            "v0.5.4a",
            "v0.5.4",
            "v0.5.3c",
            "v0.5.3b",
            "v0.5.3a",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.2",
            "v0.4.1",
            "v0.3.4",
            "v0.3.3",
            "v0.3.0",
            "v0.2.2",
            "v0.2.1a",
            "v0.2.1",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-5885.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:57.603016138Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32Y6KD3OAHCG5P33HC2QEX3NUZOSXCGZ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMCLO5PUPBA756UKY72PKUWL4RRM4W6K/",
        "https://matrix.org/blog/2019/01/10/critical-security-update-synapse-0-34-0-1-synapse-0-34-1-1/",
        "https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "28"
                  },
                  {
                    "last_affected": "28"
                  },
                  {
                    "introduced": "29"
                  },
                  {
                    "last_affected": "29"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-5885",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438891,
  "published_at": "2019-03-21T16:01:05.843+00:00"
}