ghsa-53jx-vvf9-4x38
Vulnerability from github
Published
2023-02-10 03:27
Modified
2023-02-10 03:27
Severity ?
4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
StaticHandler disclosure of classpath resources on Windows when mounted on a wildcard route
Details

Summary

When running vertx web applications that serve files using StaticHandler on Windows Operating Systems and Windows File Systems, if the mount point is a wildcard (*) then an attacker can exfiltrate any class path resource.

Details

When computing the relative path to locate the resource, in case of wildcards, the code:

https://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83

returns the user input (without validation) as the segment to lookup. Even though checks are performed to avoid escaping the sandbox, given that the input was not sanitized \ are not properly handled and an attacker can build a path that is valid within the classpath.

PoC

https://github.com/adrien-aubert-drovio/vertx-statichandler-windows-traversal-path-vulnerability

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.vertx:vertx-web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.3.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-24815"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-10T03:27:58Z",
    "nvd_published_at": "2023-02-09T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nWhen running vertx web applications that serve files using `StaticHandler` on Windows Operating Systems and Windows File Systems, if the mount point is a wildcard (`*`) then an attacker can exfiltrate any class path resource.\n\n\n### Details\nWhen computing the relative path to locate the resource, in case of wildcards, the code:\n\nhttps://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83\n\nreturns the user input (without validation) as the segment to lookup. Even though checks are performed to avoid escaping the sandbox, given that the input was not sanitized `\\` are not properly handled and an attacker can build a path that is valid within the classpath.\n\n### PoC\n\nhttps://github.com/adrien-aubert-drovio/vertx-statichandler-windows-traversal-path-vulnerability",
  "id": "GHSA-53jx-vvf9-4x38",
  "modified": "2023-02-10T03:27:58Z",
  "published": "2023-02-10T03:27:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vert-x3/vertx-web/security/advisories/GHSA-53jx-vvf9-4x38"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-24815"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vert-x3/vertx-web/commit/9e3a783b1d1a731055e9049078b1b1494ece9c15"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vert-x3/vertx-web"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vert-x3/vertx-web/blob/62c0d66fa1c179ae6a4d57344631679a2b97e60f/vertx-web/src/main/java/io/vertx/ext/web/impl/Utils.java#L83"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "StaticHandler disclosure of classpath resources on Windows when mounted on a wildcard route"
}


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