GHSA-3HFW-X7GX-437C高危已审查

Path traversal in Matrix Synapse

OSV 1.4.0 · github-reviewed · 修改于 2024-09-24 23:47

发布时间

2021-11-24 05:58

GitHub 审查时间

2021-11-24 02:44

NVD 发布时间

2021-11-24 04:15

源文件

advisories/github-reviewed/2021/11/GHSA-3hfw-x7gx-437c/GHSA-3hfw-x7gx-437c.json

公告说明

Impact

Synapse instances with the media repository enabled can be tricked into downloading a file from a remote server into an arbitrary directory, potentially outside the media store directory.

The last two directories and file name of the path are chosen randomly by Synapse and cannot be controlled by an attacker, which limits the impact.

Homeservers with the media repository disabled are unaffected. Homeservers configured with a federation whitelist are also unaffected.

Patches

Server administrators should upgrade to 1.47.1 or later.

Workarounds

Server administrators using a reverse proxy could, at the expense of losing media functionality, block the following endpoints:

/_matrix/media/r0/download/{serverName}/{mediaId}
/_matrix/media/r0/download/{serverName}/{mediaId}/{fileName}
/_matrix/media/r0/thumbnail/{serverName}/{mediaId}

Alternatively, non-containerized deployments can be adapted to use the hardened systemd config, located at contrib/systemd/override-hardened.conf.

References

n/a

For more information

If you have any questions or comments about this advisory, e-mail us at [email protected].

受影响的软件包

标识信息

别名 / CVE

CVE-2021-41281

CWE

CWE-22

软件生态

PyPI

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

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

CVSS_V4

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

原始 OSV JSON

{
  "id": "GHSA-3hfw-x7gx-437c",
  "aliases": [
    "CVE-2021-41281"
  ],
  "details": "### Impact\n\nSynapse instances with the media repository enabled can be tricked into downloading a file from a remote server into an arbitrary directory, potentially outside the media store directory.\n\nThe last two directories and file name of the path are chosen randomly by Synapse and cannot be controlled by an attacker, which limits the impact.\n\nHomeservers with the media repository disabled are unaffected. Homeservers configured with a federation whitelist are also unaffected.\n\n### Patches\nServer administrators should upgrade to 1.47.1 or later.\n\n### Workarounds\nServer administrators using a reverse proxy could, at the expense of losing media functionality, block the following endpoints:\n\n* `/_matrix/media/r0/download/{serverName}/{mediaId}`\n* `/_matrix/media/r0/download/{serverName}/{mediaId}/{fileName}`\n* `/_matrix/media/r0/thumbnail/{serverName}/{mediaId}`\n\nAlternatively, non-containerized deployments can be adapted to use the hardened systemd config, located at `contrib/systemd/override-hardened.conf`.\n\n### References\nn/a\n\n### For more information\n\nIf you have any questions or comments about this advisory, e-mail us at [email protected].\n",
  "summary": "Path traversal in Matrix Synapse",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.47.1"
            }
          ]
        }
      ],
      "package": {
        "name": "matrix-synapse",
        "ecosystem": "PyPI"
      }
    }
  ],
  "modified": "2024-09-24T15:47:18Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
    },
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
    }
  ],
  "published": "2021-11-23T21:58:56Z",
  "references": [
    {
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-3hfw-x7gx-437c",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41281",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/matrix-org/synapse/commit/91f2bd090",
      "type": "WEB"
    },
    {
      "url": "https://github.com/matrix-org/synapse",
      "type": "PACKAGE"
    },
    {
      "url": "https://github.com/matrix-org/synapse/releases/tag/v1.47.1",
      "type": "WEB"
    },
    {
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2021-436.yaml",
      "type": "WEB"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/[email protected]/message/EU7QRE55U4IUEDLKT5IYPWL3UXMELFAS",
      "type": "WEB"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/[email protected]/message/N3WY56LCEZ4ZECLWV5KMAXF2PSMUB4F2",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "nvd_published_at": "2021-11-23T20:15:00Z",
    "github_reviewed_at": "2021-11-23T18:44:39Z"
  }
}