ghsa-gcj9-jj38-hwmc
Vulnerability from github
Published
2023-06-09 19:31
Modified
2023-06-09 19:31
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
Vapor's Metrics integration could cause a system drain
Details

Impact

This is a DoS attack against anyone who Bootstraps a metrics backend for their Vapor app with the following attack vector:

  1. send unlimited requests against a vapor instance with different paths. this will create “unlimited” counters and timers, which will eventually drain the system.
  2. downstream services might suffer from this attack as well by being spammed with error paths

Patches

This has been patched in 4.40.1. The DefaultResponder will rewrite any undefined route paths for to vapor_route_undefined to avoid unlimited counters.

Workarounds

Don't bootstrap a metrics system or upgrade to 4.40.1

For more information

If you have any questions or comments about this advisory: * Open an issue in Vapor * Ask in Discord

Show details on source website

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.40.0"
      },
      "package": {
        "ecosystem": "SwiftURL",
        "name": "github.com/vapor/vapor"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.40.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21328"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-09T19:31:47Z",
    "nvd_published_at": "2021-02-26T02:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThis is a DoS attack against anyone who Bootstraps a metrics backend for their Vapor app with the following attack vector:\n\n1. send unlimited requests against a vapor instance with different paths. this will create \u201cunlimited\u201d counters and timers, which will eventually drain the system.\n2. downstream services might suffer from this attack as well by being spammed with error paths\n\n### Patches\nThis has been patched in 4.40.1. The `DefaultResponder` will rewrite any undefined route paths for to `vapor_route_undefined` to avoid unlimited counters.\n\n### Workarounds\nDon\u0027t bootstrap a metrics system or upgrade to 4.40.1\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Vapor](https://github.com/vapor/vapor)\n* Ask in [Discord](http://vapor.team)",
  "id": "GHSA-gcj9-jj38-hwmc",
  "modified": "2023-06-09T19:31:47Z",
  "published": "2023-06-09T19:31:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vapor/vapor/security/advisories/GHSA-gcj9-jj38-hwmc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21328"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vapor/vapor/commit/e3aa712508db2854ac0ab905696c65fd88fa7e23"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vapor/vapor"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vapor/vapor/releases/tag/4.40.1"
    },
    {
      "type": "WEB",
      "url": "https://vapor.codes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Vapor\u0027s Metrics integration could cause a system drain"
}


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