Vulnerability-Lookup

GHSA-7H5V-85W9-PQ6C

Vulnerability from github – Published: 2021-05-19 23:01 – Updated: 2021-05-19 19:34

Summary

Denial of service (via resource exhaustion) due to improper input validation in third-party identifier endpoint

Details

Impact

Missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.

Patches

The issue is fixed by https://github.com/matrix-org/synapse/pull/9855.

Workarounds

There are no known workarounds.

References

n/a

For more information

If you have any questions or comments about this advisory, email us at security@matrix.org.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-synapse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.33.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-19T19:34:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nMissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.\n\n### Patches\nThe issue is fixed by https://github.com/matrix-org/synapse/pull/9855.\n\n### Workarounds\nThere are no known workarounds.\n\n### References\nn/a\n\n### For more information\nIf you have any questions or comments about this advisory, email us at security@matrix.org.\n",
  "id": "GHSA-7h5v-85w9-pq6c",
  "modified": "2021-05-19T19:34:56Z",
  "published": "2021-05-19T23:01:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-7h5v-85w9-pq6c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/pull/9855"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Denial of service (via resource exhaustion) due to improper input validation in third-party identifier endpoint"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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