pysec-2023-85
Vulnerability from pysec
Published
2023-06-06 19:15
Modified
2023-06-13 20:24
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


To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-synapse",
        "purl": "pkg:pypi/matrix-synapse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.85.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.33.5",
        "0.33.5.1",
        "0.33.6",
        "0.33.6rc1",
        "0.33.7",
        "0.33.7rc1",
        "0.33.7rc2",
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        "0.99.1rc2",
        "0.99.2",
        "0.99.2rc1",
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        "1.72.0rc1",
        "1.73.0",
        "1.73.0rc2",
        "1.74.0",
        "1.74.0rc1",
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        "1.85.0rc1",
        "1.85.0rc2",
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      ]
    }
  ],
  "aliases": [
    "CVE-2023-32683",
    "GHSA-98px-6486-j7qc"
  ],
  "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": "PYSEC-2023-85",
  "modified": "2023-06-13T20:24:13.764030Z",
  "published": "2023-06-06T19:15:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc"
    },
    {
      "type": "FIX",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc"
    },
    {
      "type": "FIX",
      "url": "https://github.com/matrix-org/synapse/pull/15601"
    }
  ]
}


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