GHSA-9jhm-8m8c-c3f4
Vulnerability from github
Published
2021-04-19 14:54
Modified
2024-09-30 20:40
Severity ?
7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Summary
SSRF in Sydent due to missing validation of hostnames
Details

Impact

Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting.

It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration.

Patches

Fixed in 9e57334, 8936925, 3d531ed, 0f00412

Workarounds

A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.

For more information

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

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-sydent"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29431"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-04-15T21:00:29Z",
    "nvd_published_at": "2021-04-15T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nSydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting.\n\nIt is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration.\n\n### Patches\n\nFixed in 9e57334, 8936925, 3d531ed, 0f00412\n\n### Workarounds\n\nA potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at security@matrix.org.",
  "id": "GHSA-9jhm-8m8c-c3f4",
  "modified": "2024-09-30T20:40:49Z",
  "published": "2021-04-19T14:54:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29431"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/sydent"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/sydent/releases/tag/v2.3.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-22.yaml"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/matrix-sydent"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "SSRF in Sydent due to missing validation of hostnames"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.