Vulnerability-Lookup

PYSEC-2023-199

Vulnerability from pysec - Published: 2023-10-10 18:15 - Updated: 2023-10-17 22:26

Details

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.

Severity

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Impacted products

Name	purl
matrix-synapse	pkg:pypi/matrix-synapse

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-synapse",
        "purl": "pkg:pypi/matrix-synapse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.94.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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      ]
    }
  ],
  "aliases": [
    "CVE-2023-45129",
    "GHSA-5chr-wjw5-3gq4"
  ],
  "details": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.",
  "id": "PYSEC-2023-199",
  "modified": "2023-10-17T22:26:17.611846+00:00",
  "published": "2023-10-10T18:15:00+00:00",
  "references": [
    {
      "type": "WEB",
      "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"
    },
    {
      "type": "FIX",
      "url": "https://github.com/matrix-org/synapse/pull/16360"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/synapse/pull/16360"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-45129 (GCVE-0-2023-45129)

Vulnerability from cvelistv5 – Published: 2023-10-10 17:17 – Updated: 2025-02-13 17:13

Title

matrix-synapse vulnerable to denial of service due to malicious server ACL events

Summary

Severity

4.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/matrix-org/synapse/security/ad…	x_refsource_CONFIRM
https://github.com/matrix-org/synapse/pull/16360	x_refsource_MISC
https://matrix-org.github.io/synapse/latest/admin…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://security.gentoo.org/glsa/202401-12

Impacted products

1 product

Vendor	Product	Version
matrix-org	synapse	Affected: < 1.94.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T20:14:19.828Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
          },
          {
            "name": "https://github.com/matrix-org/synapse/pull/16360",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/matrix-org/synapse/pull/16360"
          },
          {
            "name": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version",
            "tags": [
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            "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"
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          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"
          },
          {
            "tags": [
              "x_transferred"
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/"
          },
          {
            "tags": [
              "x_transferred"
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"
          },
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            "tags": [
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202401-12"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "synapse",
          "vendor": "matrix-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.94.0"
            }
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      "descriptions": [
        {
          "lang": "en",
          "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-07T11:08:07.295Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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        {
          "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4",
          "tags": [
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          "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
        },
        {
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          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/matrix-org/synapse/pull/16360"
        },
        {
          "name": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version",
          "tags": [
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          "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"
        },
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        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"
        },
        {
          "url": "https://security.gentoo.org/glsa/202401-12"
        }
      ],
      "source": {
        "advisory": "GHSA-5chr-wjw5-3gq4",
        "discovery": "UNKNOWN"
      },
      "title": "matrix-synapse vulnerable to denial of service due to malicious server ACL events"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-45129",
    "datePublished": "2023-10-10T17:17:11.146Z",
    "dateReserved": "2023-10-04T16:02:46.328Z",
    "dateUpdated": "2025-02-13T17:13:47.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-5CHR-WJW5-3GQ4

Vulnerability from github – Published: 2023-10-10 21:27 – Updated: 2024-09-24 17:42

Summary

matrix-synapse vulnerable to denial of service due to malicious server ACL events

Details

Impact

A malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service.

Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected.

Patches

Server administrators are advised to upgrade to Synapse 1.94.0 or later.

Workarounds

Rooms with malicious server ACL events can be purged and blocked using the admin API.

Severity

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-synapse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.94.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-45129"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-10-10T21:27:53Z",
    "nvd_published_at": "2023-10-10T18:15:19Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nA malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service.\n\nHomeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected.\n\n### Patches\nServer administrators are advised to upgrade to Synapse 1.94.0 or later.\n\n### Workarounds\nRooms with malicious server ACL events can be [purged and blocked](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version) using the admin API.\n",
  "id": "GHSA-5chr-wjw5-3gq4",
  "modified": "2024-09-24T17:42:27Z",
  "published": "2023-10-10T21:27:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45129"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/pull/16360"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/commit/f84da3c32ec74cf054e2fd6d10618aa4997cffaa"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/synapse"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-199.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3"
    },
    {
      "type": "WEB",
      "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202401-12"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "matrix-synapse vulnerable to denial of service due to malicious server ACL events"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

PYSEC-2023-199

CVE-2023-45129 (GCVE-0-2023-45129)

GHSA-5CHR-WJW5-3GQ4

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature

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