Vulnerability-Lookup

CVE-2024-37303 (GCVE-0-2024-37303)

Vulnerability from cvelistv5 – Published: 2024-12-03 17:06 – Updated: 2024-12-03 18:51

Title

Synapse unauthenticated writes to the media repository allow planting of problematic content

Summary

Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.

Severity ?

5.3 (Medium)


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

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

URL

Tags

	https://github.com/element-hq/synapse/security/ad…	x_refsource_CONFIRM
	https://github.com/matrix-org/matrix-spec-proposa…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	element-hq	synapse	Affected: < 1.106

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:element-hq:synapse:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "synapse",
            "vendor": "element-hq",
            "versions": [
              {
                "lessThan": "1.106",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-37303",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-12-03T18:49:29.668536Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-12-03T18:51:29.590Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "synapse",
          "vendor": "element-hq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.106"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-03T17:06:02.467Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr"
        },
        {
          "name": "https://github.com/matrix-org/matrix-spec-proposals/pull/3916",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3916"
        }
      ],
      "source": {
        "advisory": "GHSA-gjgr-7834-rhxr",
        "discovery": "UNKNOWN"
      },
      "title": "Synapse unauthenticated writes to the media repository allow planting of problematic content"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-37303",
    "datePublished": "2024-12-03T17:06:02.467Z",
    "dateReserved": "2024-06-05T20:10:46.497Z",
    "dateUpdated": "2024-12-03T18:51:29.590Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-37303\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-03T18:49:29.668536Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:element-hq:synapse:*:*:*:*:*:*:*:*\"], \"vendor\": \"element-hq\", \"product\": \"synapse\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.106\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-03T18:50:46.020Z\"}}], \"cna\": {\"title\": \"Synapse unauthenticated writes to the media repository allow planting of problematic content\", \"source\": {\"advisory\": \"GHSA-gjgr-7834-rhxr\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"element-hq\", \"product\": \"synapse\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 1.106\"}]}], \"references\": [{\"url\": \"https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr\", \"name\": \"https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/matrix-org/matrix-spec-proposals/pull/3916\", \"name\": \"https://github.com/matrix-org/matrix-spec-proposals/pull/3916\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306: Missing Authentication for Critical Function\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-12-03T17:06:02.467Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-37303\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-03T18:51:29.590Z\", \"dateReserved\": \"2024-06-05T20:10:46.497Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2024-12-03T17:06:02.467Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2024-37303

Vulnerability from fkie_nvd - Published: 2024-12-03 17:15 - Updated: 2025-08-26 15:09

Severity ?

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr	Vendor Advisory
	security-advisories@github.com	https://github.com/matrix-org/matrix-spec-proposals/pull/3916	Issue Tracking, Patch

Impacted products

	Vendor	Product	Version
	matrix	synapse	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F7574431-51E3-465D-A1B9-5D05FD28160B",
              "versionEndExcluding": "1.106.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector."
    },
    {
      "lang": "es",
      "value": "Synapse es un servidor dom\u00e9stico Matrix de c\u00f3digo abierto. La versi\u00f3n 1.106 de Synapse permite, por dise\u00f1o, que los participantes remotos no autenticados activen una descarga y un almacenamiento en cach\u00e9 de contenido multimedia remoto desde un servidor dom\u00e9stico remoto al repositorio de contenido multimedia local. Dicho contenido tambi\u00e9n se vuelve disponible para su descarga desde el servidor dom\u00e9stico local de forma no autenticada. La implicaci\u00f3n es que los adversarios remotos no autenticados pueden usar esta funcionalidad para introducir contenido problem\u00e1tico en el repositorio de contenido multimedia. La versi\u00f3n 1.106 de Synapse introduce una mitigaci\u00f3n parcial en forma de nuevos endpoints que requieren autenticaci\u00f3n para las descargas de contenido multimedia. Los endpoints no autenticados se congelar\u00e1n en una versi\u00f3n futura, lo que cerrar\u00e1 el vector de ataque."
    }
  ],
  "id": "CVE-2024-37303",
  "lastModified": "2025-08-26T15:09:47.387",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-12-03T17:15:10.890",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3916"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-GJGR-7834-RHXR

Vulnerability from github – Published: 2024-12-03 18:40 – Updated: 2024-12-03 18:40

Summary

Synapse's unauthenticated writes to the media repository allow planting of problematic content

Details

Impact

Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository.

Patches

Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.

Workarounds

Though extremely limited, server operators can use more strict rate limits based on IP address.

References

https://github.com/matrix-org/matrix-spec-proposals/pull/3916

For more information

If you have any questions or comments about this advisory, please email us at security at element.io.

Severity ?

5.3 (Medium)


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

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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": "1.106"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-37303"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-12-03T18:40:01Z",
    "nvd_published_at": "2024-12-03T17:15:10Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nSynapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository.\n\n### Patches\n\nSynapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.\n\n### Workarounds\n\nThough extremely limited, server operators can use more strict rate limits based on IP address.\n\n### References\n\n* https://github.com/matrix-org/matrix-spec-proposals/pull/3916\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).",
  "id": "GHSA-gjgr-7834-rhxr",
  "modified": "2024-12-03T18:40:01Z",
  "published": "2024-12-03T18:40:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-37303"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-spec-proposals/pull/3916"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/element-hq/synapse"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Synapse\u0027s unauthenticated writes to the media repository allow planting of problematic content"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2024-37303 (GCVE-0-2024-37303)

FKIE_CVE-2024-37303

GHSA-GJGR-7834-RHXR

Impact

Patches

Workarounds

References

For more information

Tags

Sightings

Nomenclature