GHSA-W23Q-4HW3-2PP6

Vulnerability from github – Published: 2023-09-06 18:43 – Updated: 2023-09-06 18:43
VLAI?
Summary
Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation
Details

Impact

All users on Windows are impacted. MinIO fails to filter the \ character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to PutObject in a specific bucket, can create an admin user.

Patches

There are two patches that fix this problem comprehensively

commit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc
Author: Harshavardhana <harsha@minio.io>
Date:   Mon Mar 20 13:16:00 2023 -0700

    reject object names with '\' on windows (#16856)

commit 8d6558b23649f613414c8527b58973fbdfa4d1b8
Author: Harshavardhana <harsha@minio.io>
Date:   Mon Mar 20 00:35:25 2023 -0700

    fix: convert '\' to '/' on windows (#16852)

Workarounds

There are no known workarounds

References

The vulnerable code:

// minio/cmd/generic-handlers.go
// Check if the incoming path has bad path components,
// such as ".." and "."
// SlashSeparator -> /
// dotdotComponent -> ..
// dotComponent -> .
func hasBadPathComponent(path string) bool {
  path = strings.TrimSpace(path)
  for _, p := range strings.Split(path, SlashSeparator) {
    switch strings.TrimSpace(p) {
    case dotdotComponent:
      return true
    case dotComponent:
      return true
    }
  }
  return false
}
Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/minio/minio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-202303200735"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-28433"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-668"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-09-06T18:43:13Z",
    "nvd_published_at": "2023-03-22T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nAll users on Windows are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across\nbuckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user.\n\n### Patches\nThere are two patches that fix this problem comprehensively\n\n```\ncommit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 13:16:00 2023 -0700\n\n    reject object names with \u0027\\\u0027 on windows (#16856)\n```\n\n```\ncommit 8d6558b23649f613414c8527b58973fbdfa4d1b8\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 00:35:25 2023 -0700\n\n    fix: convert \u0027\\\u0027 to \u0027/\u0027 on windows (#16852)\n```\n\n### Workarounds\nThere are no known workarounds\n\n### References\nThe vulnerable code:\n```go\n// minio/cmd/generic-handlers.go\n// Check if the incoming path has bad path components,\n// such as \"..\" and \".\"\n// SlashSeparator -\u003e /\n// dotdotComponent -\u003e ..\n// dotComponent -\u003e .\nfunc hasBadPathComponent(path string) bool {\n  path = strings.TrimSpace(path)\n  for _, p := range strings.Split(path, SlashSeparator) {\n    switch strings.TrimSpace(p) {\n    case dotdotComponent:\n      return true\n    case dotComponent:\n      return true\n    }\n  }\n  return false\n}\n```\n",
  "id": "GHSA-w23q-4hw3-2pp6",
  "modified": "2023-09-06T18:43:13Z",
  "published": "2023-09-06T18:43:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28433"
    },
    {
      "type": "WEB",
      "url": "https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/minio/minio"
    },
    {
      "type": "WEB",
      "url": "https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation"
}


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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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.