GHSA-PMW4-JGXX-PCQ9中危已审查

File System Bounds Escape

OSV 1.4.0 · github-reviewed · 修改于 2021-02-12 01:04

发布时间

2021-02-11 02:11

GitHub 审查时间

2021-02-11 02:11

NVD 发布时间

2021-02-11 02:15

源文件

advisories/github-reviewed/2021/02/GHSA-pmw4-jgxx-pcq9/GHSA-pmw4-jgxx-pcq9.json

公告说明

Impact

Clients of FTP servers utilizing ftp-srv hosted on Windows machines can escape the FTP user's defined root folder using the expected FTP commands, for example, CWD and UPDR.

Background

When windows separators exist within the path (\), path.resolve leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function.

Screen Shot 2020-12-15 at 6 42 52 PM

Patches

None at the moment.

Workarounds

There are no workarounds for windows servers. Hosting the server on a different OS mitigates the issue.

References

Issues: https://github.com/autovance/ftp-srv/issues/167 https://github.com/autovance/ftp-srv/issues/225

For more information

If you have any questions or comments about this advisory: Open an issue at https://github.com/autovance/ftp-srv. Please email us directly; [email protected].

受影响的软件包

标识信息

别名 / CVE

CVE-2020-26299

CWE

CWE-22

软件生态

npm

扩展资料

暂无扩展资料。

CVSS 评分

没有 CVSS 数据。

原始 OSV JSON

{
  "id": "GHSA-pmw4-jgxx-pcq9",
  "aliases": [
    "CVE-2020-26299"
  ],
  "details": "### Impact\n\nClients of FTP servers utilizing `ftp-srv` hosted on Windows machines can escape the  FTP user's defined root folder using the expected FTP commands, for example, `CWD` and `UPDR`.\n\n### Background\n\nWhen windows separators exist within the path (`\\`), `path.resolve` leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function.\n\n![Screen Shot 2020-12-15 at 6 42 52 PM](https://user-images.githubusercontent.com/3375444/102293941-5a75fb80-3f05-11eb-9d71-0c190a8dcc75.png)\n\n### Patches\nNone at the moment.\n\n### Workarounds\nThere are no workarounds for windows servers. Hosting the server on a different OS mitigates the issue.\n\n### References\n\nIssues: \nhttps://github.com/autovance/ftp-srv/issues/167\nhttps://github.com/autovance/ftp-srv/issues/225\n\n### For more information\nIf you have any questions or comments about this advisory:\nOpen an issue at https://github.com/autovance/ftp-srv.\nPlease email us directly; [email protected].",
  "summary": "File System Bounds Escape",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.0"
            }
          ]
        }
      ],
      "package": {
        "name": "ftp-srv",
        "ecosystem": "npm"
      }
    }
  ],
  "modified": "2021-02-11T17:04:52Z",
  "severity": [],
  "published": "2021-02-10T18:11:34Z",
  "references": [
    {
      "url": "https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26299",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/autovance/ftp-srv/issues/167",
      "type": "WEB"
    },
    {
      "url": "https://github.com/autovance/ftp-srv/issues/225",
      "type": "WEB"
    },
    {
      "url": "https://github.com/autovance/ftp-srv/pull/224",
      "type": "WEB"
    },
    {
      "url": "https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3",
      "type": "WEB"
    },
    {
      "url": "https://www.npmjs.com/package/ftp-srv",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "nvd_published_at": "2021-02-10T18:15:00Z",
    "github_reviewed_at": "2021-02-10T18:11:21Z"
  }
}