Security advisory

{
  "id": "db206a258fb32fd42f25dc3fb18ac99cffd2b284a1ec3076975fa04f654d2fb2",
  "url": "https://osv.dev/vulnerability/CVE-2021-29978",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29978",
    "summary": "Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.",
    "evidence": "osv:CVE-2021-29978",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-29978",
      "aliases": [
        "CVE-2021-29978"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mozilla-mobile/mozilla-vpn-client",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "46707e6bf02bc1252ab53908b72c716ba5a1eeeb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mozilla:mozilla_vpn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0"
                      },
                      {
                        "fixed": "2.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.1.0",
            "v2.0.3",
            "v2.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29978.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-29978-1e181dd3",
                "digest": {
                  "threshold": 0.9,
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                },
                "source": "https://github.com/mozilla-mobile/mozilla-vpn-client/commit/46707e6bf02bc1252ab53908b72c716ba5a1eeeb",
                "target": {
                  "file": "src/tasks/authenticate/taskauthenticate.cpp"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-29978-93162617",
                "digest": {
                  "length": 1891,
                  "function_hash": "210460384781796843534317435578731586283"
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                "source": "https://github.com/mozilla-mobile/mozilla-vpn-client/commit/46707e6bf02bc1252ab53908b72c716ba5a1eeeb",
                "target": {
                  "file": "src/tasks/authenticate/taskauthenticate.cpp",
                  "function": "TaskAuthenticate::run"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
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            ],
            "vanir_signatures_modified": "2026-10-20T14:21:53Z"
          }
        }
      ],
      "modified": "2026-10-20T14:21:53.229809937Z",
      "provider": "osv",
      "references": [
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/797",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/798",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/801",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/803",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/804",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/805",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/808",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/809",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/810",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/812",
        "https://www.mozilla.org/security/advisories/mfsa2021-31/",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/pull/816",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/799",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/800",
        "https://github.com/mozilla-mobile/mozilla-vpn-client/issues/806"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-29978",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388832,
  "published_at": "2021-08-05T20:15:08.857+00:00"
}