GSD-2023-32683

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.
Aliases
Aliases
CVE-2023-32683
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{
  "GSD": {
    "alias": "CVE-2023-32683",
    "id": "GSD-2023-32683"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-32683"
      ],
      "details": "Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.",
      "id": "GSD-2023-32683",
      "modified": "2023-12-13T01:20:23.904912Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2023-32683",
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      "affects": {
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          "vendor_data": [
            {
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                  {
                    "product_name": "synapse",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "\u003c 1.85.0"
                        }
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                    }
                  }
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              },
              "vendor_name": "matrix-org"
            }
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            "value": "Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
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      "problemtype": {
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            "description": [
              {
                "cweId": "CWE-863",
                "lang": "eng",
                "value": "CWE-863: Incorrect Authorization"
              }
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          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc",
            "refsource": "MISC",
            "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc"
          },
          {
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            "url": "https://github.com/matrix-org/synapse/pull/15601"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X6DH5A5YEB5LRIPP32OUW25FCGZFCZU2/"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-98px-6486-j7qc",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c1.85.0",
          "affected_versions": "All versions before 1.85.0",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-863",
            "CWE-937"
          ],
          "date": "2023-06-17",
          "description": "Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the `url_preview_url_block list` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_block list` setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or have not configured a `url_preview_url_block list` are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.",
          "fixed_versions": [
            "1.85.0"
          ],
          "identifier": "CVE-2023-32683",
          "identifiers": [
            "CVE-2023-32683",
            "GHSA-98px-6486-j7qc"
          ],
          "not_impacted": "All versions starting from 1.85.0",
          "package_slug": "pypi/matrix-synapse",
          "pubdate": "2023-06-06",
          "solution": "Upgrade to version 1.85.0 or above.",
          "title": "Server-Side Request Forgery (SSRF)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2023-32683",
            "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc",
            "https://github.com/matrix-org/synapse/pull/15601"
          ],
          "uuid": "cc863049-f259-4115-baf5-d9daee3e9db6"
        }
      ]
    },
    "nvd.nist.gov": {
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        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.85.0",
                "vulnerable": true
              }
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            "operator": "OR"
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        "description": {
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            }
          ]
        },
        "problemtype": {
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              "description": [
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              "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc",
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              "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc"
            },
            {
              "name": "https://github.com/matrix-org/synapse/pull/15601",
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
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            "confidentialityImpact": "LOW",
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            "privilegesRequired": "LOW",
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            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.5
        }
      },
      "lastModifiedDate": "2023-06-17T03:15Z",
      "publishedDate": "2023-06-06T19:15Z"
    }
  }
}


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  • 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.
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  • 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.



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