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Security Advisories: GSA_kwCzR0hTQS1nY2o5LWpqMzgtaHdtY84AAzw8

Vapor's Metrics integration could cause a system drain

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:

Permalink: https://github.com/advisories/GHSA-gcj9-jj38-hwmc
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1nY2o5LWpqMzgtaHdtY84AAzw8
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 11 months ago
Updated: 11 months ago


CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Identifiers: GHSA-gcj9-jj38-hwmc, CVE-2021-21328
References: Repository: https://github.com/vapor/vapor
Blast Radius: 15.4

Affected Packages

swift:github.com/vapor/vapor
Dependent packages: 105
Dependent repositories: 796
Downloads:
Affected Version Ranges: <= 4.40.0
Fixed in: 4.40.1
All affected versions: 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.1.8, 0.1.9, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.2.6, 0.2.7, 0.2.8, 0.2.9, 0.2.10, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5, 0.4.0, 0.4.1, 0.4.2, 0.5.0, 0.5.1, 0.5.2, 0.5.3, 0.6.0, 0.7.0, 0.7.1, 0.8.0, 0.8.1, 0.8.2, 0.9.0, 0.9.1, 0.9.2, 0.10.0, 0.11.0, 0.11.1, 0.12.0, 0.12.1, 0.12.2, 0.12.3, 0.13.0, 0.14.0, 0.15.0, 0.15.1, 0.15.2, 0.15.3, 0.16.0, 0.16.1, 0.16.2, 0.17.0, 0.17.1, 0.17.2, 0.18.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.1.7, 1.1.8, 1.1.9, 1.1.10, 1.1.11, 1.1.12, 1.1.13, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.3.6, 1.3.7, 1.3.8, 1.3.9, 1.3.10, 1.3.11
All unaffected versions: 4.48.5, 4.48.6, 4.48.7, 4.48.8, 4.49.0, 4.49.1, 4.49.2, 4.50.0, 4.51.0, 4.51.1, 4.52.0, 4.52.1, 4.52.2, 4.52.3, 4.52.4, 4.52.5, 4.53.0, 4.54.0, 4.54.1, 4.54.2, 4.55.0, 4.55.1, 4.55.2, 4.55.3, 4.55.4, 4.56.0, 4.57.0, 4.57.1, 4.58.0, 4.59.0, 4.59.1, 4.60.0, 4.60.1, 4.60.2, 4.60.3, 4.61.0, 4.61.1, 4.62.0, 4.62.1, 4.62.2, 4.63.0, 4.64.0, 4.65.0, 4.65.1, 4.65.2, 4.66.0, 4.66.1, 4.67.0, 4.67.1, 4.67.2, 4.67.3, 4.67.4, 4.67.5, 4.68.0, 4.69.0, 4.69.1, 4.69.2, 4.70.0, 4.71.0, 4.71.1, 4.72.0, 4.72.1, 4.73.0, 4.74.0, 4.74.1, 4.74.2, 4.75.0, 4.75.1, 4.75.2, 4.76.0, 4.76.1, 4.76.2, 4.76.3, 4.76.4, 4.77.0, 4.77.1, 4.77.2, 4.78.0, 4.78.1, 4.78.2, 4.79.0, 4.80.0, 4.81.0, 4.81.1, 4.82.0, 4.83.0, 4.83.1, 4.83.2, 4.84.0, 4.84.1, 4.84.2, 4.84.3, 4.84.4, 4.84.5, 4.84.6, 4.85.0, 4.85.1, 4.86.0, 4.86.1, 4.86.2, 4.87.0, 4.87.1, 4.88.0, 4.89.0, 4.89.1, 4.89.2, 4.89.3, 4.90.0, 4.91.0, 4.91.1, 4.92.0, 4.92.1, 4.92.2, 4.92.3, 4.92.4, 4.92.5, 4.92.6, 4.92.7, 4.92.8, 4.92.9, 4.93.0, 4.93.1, 4.93.2, 4.94.0, 4.94.1