GHSA-gcj9-jj38-hwmc

Source

https://github.com/advisories/GHSA-gcj9-jj38-hwmc

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-gcj9-jj38-hwmc/GHSA-gcj9-jj38-hwmc.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-gcj9-jj38-hwmc

Aliases

CVE-2021-21328

Published

2023-06-09T19:31:47Z

Modified

2023-11-08T04:04:41.457792Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

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:

send unlimited requests against a vapor instance with different paths. this will create “unlimited” counters and timers, which will eventually drain the system.
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

Database specific

{
    "nvd_published_at": "2021-02-26T02:15:00Z",
    "cwe_ids": [
        "CWE-400"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-09T19:31:47Z"
}

References

Affected packages

SwiftURL / github.com/vapor/vapor

Package

Name: github.com/vapor/vapor
Purl: pkg:swift/github.com/vapor/vapor

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.40.1

Database specific

{
    "last_known_affected_version_range": "<= 4.40.0"
}