CVE-2021-21403: Github.com/kongchuanhujiao/server Authentication Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-8wrg-m8vm-5fvj
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CVSS 7.5
CWE-287 CWE-305
Published
Advisory Summary

CVE-2021-21403 is a HIGH (CVSS 7.5) authentication bypass vulnerability (CWE-287: Improper Authentication) affecting Github.com/kongchuanhujiao/server libraries in the Go ecosystem. The issue involves authentication bypass by primary weakness in github.com/kongchuanhujiao/server. Remediation is available by upgrading affected packages to version 1.3.21.

CVE-2021-21403 at a Glance

CVE Identifier CVE-2021-21403
GHSA Identifier GHSA-8wrg-m8vm-5fvj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-287: Improper Authentication
Affected Product Github.com/kongchuanhujiao/server
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:H/I:N/A:N).

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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2021-21403

To remediate this vulnerability, upgrade all affected Github.com/kongchuanhujiao/server 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/kongchuanhujiao/server fixed: 1.3.21 
Upgrade github.com/kongchuanhujiao/server to 1.3.21
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/kongchuanhujiao/server

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-21403, inspect your project dependencies for Github.com/kongchuanhujiao/server:

inspect dependencies for github.com/kongchuanhujiao/server

Analyze the terminal output to locate any version of Github.com/kongchuanhujiao/server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.21), 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Github.com/kongchuanhujiao/server, 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

### Impact Authentication Bypass by Primary Weakness (CWE-305) Commit: https://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1 ALL Users is impacted. ### Patches Yes, PLEASE UPGRADE TO v1.3.21-beta.d0ffc0a6

CVE-2021-21403 Affected Github.com/kongchuanhujiao/server Versions

1 component(s)
Fixed Versions:
1.3.21
Product / Package Ecosystem Affected Versions Fixed Version
github.com/kongchuanhujiao/server
golang/github.com/kongchuanhujiao/server
Go
< 1.3.21
1.3.21

References

GitHub Advisory / Wiki ADVISORY
https://github.com/kongchuanhujiao/server/security/advisories/GHSA-8wrg-m8vm-5fvj
NVD — CVE-2021-21403 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21403
Security Fix Commit FIX COMMIT
https://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1

Frequently Asked Questions

What is CVE-2021-21403?
CVE-2021-21403 is a security vulnerability in Github.com/kongchuanhujiao/server involving Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server under CWE-287: Improper Authentication.
Which Github.com/kongchuanhujiao/server versions are affected?
Affected versions include releases prior to 1.3.21 across affected packages: github.com/kongchuanhujiao/server.
What version fixes CVE-2021-21403?
Upgrading to 1.3.21 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/kongchuanhujiao/server affected?
Yes, github.com/kongchuanhujiao/server is affected in releases prior to 1.3.21. Upgrade your dependency to 1.3.21 or later.
What is the CVSS score of CVE-2021-21403?
CVE-2021-21403 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2021-21403?
CVE-2021-21403 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Go dependencies for CVE-2021-21403?
Run the dependency tree command: 'inspect dependencies for github.com/kongchuanhujiao/server'. 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-8wrg-m8vm-5fvj",
  "modified" : "2021-05-20T22:25:09Z",
  "published" : "2022-02-15T01:57:18Z",
  "aliases" : [ "CVE-2021-21403" ],
  "summary" : "Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server",
  "details" : "### Impact\n\nAuthentication Bypass by Primary Weakness (CWE-305)\n\nCommit:\n\nhttps://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1\n\nALL Users  is impacted.\n\n### Patches\n\nYes, PLEASE UPGRADE TO v1.3.21-beta.d0ffc0a6",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kongchuanhujiao/server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.21"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/kongchuanhujiao/server/security/advisories/GHSA-8wrg-m8vm-5fvj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21403"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287", "CWE-305" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-20T22:25:09Z",
    "nvd_published_at" : "2021-03-26T18:15:00Z"
  }
}