CVE-2023-44386: Github.com/vapor/vapor Vapor's Incorrect Request Error Handling Vulnerability

MODERATE
Advisory Identifier: GHSA-3mwq-h3g6-ffhm
Share
CVSS 5.3
CWE-231
Published
Advisory Summary

CVE-2023-44386 is a MODERATE (CVSS 5.3) vapor's incorrect request error handling vulnerability (CWE-231: Improper Handling of Extra Values) affecting Github.com/vapor/vapor libraries in the SwiftURL ecosystem. The issue involves vapor's incorrect request error handling triggers server crash. Remediation is available by upgrading affected packages to version 4.84.2.

CVE-2023-44386 at a Glance

CVE Identifier CVE-2023-44386
GHSA Identifier GHSA-3mwq-h3g6-ffhm
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-231: Improper Handling of Extra Values
Affected Product Github.com/vapor/vapor
Package Ecosystem SwiftURL
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2023-44386

To remediate this vulnerability, upgrade all affected Github.com/vapor/vapor dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/vapor/vapor fixed: 4.84.2 
Upgrade github.com/vapor/vapor to 4.84.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/vapor/vapor

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-44386, inspect your project dependencies for Github.com/vapor/vapor:

inspect dependencies for github.com/vapor/vapor

Analyze the terminal output to locate any version of Github.com/vapor/vapor in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.84.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-231: Improper Handling of Extra Values, where the product does not handle or incorrectly handles when more values are provided than expected. In Github.com/vapor/vapor, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Vapor incorrectly handles errors encountered during parsing of HTTP 1.x requests, triggering a precondition failure in swift-nio due to API misuse and causing immediate termination of the server process. ### Impact This is a denial of service vulnerability, impacting all users of affected versions of Vapor. Because the crash is an explicit assertion failure, there is no corruption of process state and no risk of data leakage or unauthorized code execution. Total impact is limited to an immediately recoverable service interruption. ### Patches The issue is fixed as of Vapor release 4.84.2. ### Workarounds None known at this time. ### For more information If you have any questions or comments about this advisory: * Open an issue in [the Vapor repo](https://github.com/vapor/vapor) * Ask in [Vapor Discord](http://vapor.team) ### Acknowledgements Full credit for reporting this issue goes to @t0rchwo0d, with additional thanks for responsibly disclosing.

CVE-2023-44386 Affected Github.com/vapor/vapor Versions

1 component(s)
Fixed Versions:
4.84.2
Product / Package Ecosystem Affected Versions Fixed Version
github.com/vapor/vapor
 SwiftURL
≥ 4.83.2
< 4.84.2
4.84.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vapor/vapor/security/advisories/GHSA-3mwq-h3g6-ffhm
NVD — CVE-2023-44386 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-44386
Security Fix Commit FIX COMMIT
https://github.com/vapor/vapor/commit/090464a654b03148b139a81f8f5ac63b0856f6f3
Github.com/vapor/vapor Source Repository REPOSITORY
https://github.com/vapor/vapor
Github.com/vapor/vapor Release RELEASE
https://github.com/vapor/vapor/releases/tag/4.84.2

Frequently Asked Questions

What is CVE-2023-44386?
CVE-2023-44386 is a security vulnerability in Github.com/vapor/vapor involving Vapor's incorrect request error handling triggers server crash under CWE-231: Improper Handling of Extra Values.
Which Github.com/vapor/vapor versions are affected?
Affected versions include releases prior to 4.84.2 across affected packages: github.com/vapor/vapor.
What version fixes CVE-2023-44386?
Upgrading to 4.84.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/vapor/vapor affected?
Yes, github.com/vapor/vapor is affected in releases prior to 4.84.2. Upgrade your dependency to 4.84.2 or later.
What is the CVSS score of CVE-2023-44386?
CVE-2023-44386 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2023-44386?
CVE-2023-44386 is classified under CWE-231: Improper Handling of Extra Values (The product does not handle or incorrectly handles when more values are provided than expected.).
How can I check SwiftURL dependencies for CVE-2023-44386?
Run the dependency tree command: 'inspect dependencies for github.com/vapor/vapor'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3mwq-h3g6-ffhm",
  "modified" : "2024-02-09T00:31:39Z",
  "published" : "2023-10-05T20:55:58Z",
  "aliases" : [ "CVE-2023-44386" ],
  "summary" : "Vapor's incorrect request error handling triggers server crash",
  "details" : "Vapor incorrectly handles errors encountered during parsing of HTTP 1.x requests, triggering a precondition failure in swift-nio due to API misuse and causing immediate termination of the server process.\n\n### Impact\nThis is a denial of service vulnerability, impacting all users of affected versions of Vapor. Because the crash is an explicit assertion failure, there is no corruption of process state and no risk of data leakage or unauthorized code execution. Total impact is limited to an immediately recoverable service interruption.\n\n### Patches\nThe issue is fixed as of Vapor release 4.84.2.\n\n### Workarounds\nNone known at this time.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Vapor repo](https://github.com/vapor/vapor)\n* Ask in [Vapor Discord](http://vapor.team)\n\n### Acknowledgements\n\nFull credit for reporting this issue goes to @t0rchwo0d, with additional thanks for responsibly disclosing.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "SwiftURL",
      "name" : "github.com/vapor/vapor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.83.2"
      }, {
        "fixed" : "4.84.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vapor/vapor/security/advisories/GHSA-3mwq-h3g6-ffhm"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-44386"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vapor/vapor/commit/090464a654b03148b139a81f8f5ac63b0856f6f3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vapor/vapor"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vapor/vapor/releases/tag/4.84.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-231" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-10-05T20:55:58Z",
    "nvd_published_at" : "2023-10-05T18:15:12Z"
  }
}