ghsa-pfw4-xjgm-267c
Vulnerability from github
Published
2022-09-15 03:28
Modified
2022-09-15 03:28
Severity ?
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
Dendrite signature checks not applied to some retrieved missing events
Details

Impact

Events retrieved from a remote homeserver using /get_missing_events did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint.

Note that this does not apply to events retrieved through other endpoints (e.g. /event, /state) as they have been correctly verified.

Homeservers that have federation disabled are not vulnerable.

Patches

The problem has been fixed in Dendrite 0.9.8.

Workarounds

There are no workarounds.

Special thanks

Tulir Asokan, who spotted the issue originally.

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/matrix-org/dendrite"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-39200"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-15T03:28:01Z",
    "nvd_published_at": "2022-09-12T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nEvents retrieved from a remote homeserver using `/get_missing_events` did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint.\n\nNote that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified.\n\nHomeservers that have federation disabled are not vulnerable.\n\n### Patches\n\nThe problem has been fixed in Dendrite 0.9.8.\n\n### Workarounds\n\nThere are no workarounds.\n\n### Special thanks\n\nTulir Asokan, who spotted the issue originally.",
  "id": "GHSA-pfw4-xjgm-267c",
  "modified": "2022-09-15T03:28:01Z",
  "published": "2022-09-15T03:28:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-39200"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/dendrite"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Dendrite signature checks not applied to some retrieved missing events"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.