CVE-2024-39223: Github.com/ginuerzh/gost Missing Key Verification Vulnerability

CRITICAL
Advisory Identifier: GHSA-8wxx-35qc-vp6r
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CVSS 9.8
CWE-639 CWE-289
Published
Advisory Summary

CVE-2024-39223 is a CRITICAL (CVSS 9.8) missing key verification vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Github.com/ginuerzh/gost libraries in the Go ecosystem. The issue involves missing key verification in gost. Remediation is available in the latest vendor maintenance releases.

CVE-2024-39223 at a Glance

CVE Identifier CVE-2024-39223
GHSA Identifier GHSA-8wxx-35qc-vp6r
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Github.com/ginuerzh/gost
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/A:H).

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 High (I:H)
Availability High (A:H)

How to Fix CVE-2024-39223

To remediate this vulnerability, upgrade all affected Github.com/ginuerzh/gost 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/ginuerzh/gost fixed: Latest secure release 
Upgrade github.com/ginuerzh/gost to Latest secure release
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/ginuerzh/gost

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-39223, inspect your project dependencies for Github.com/ginuerzh/gost:

inspect dependencies for github.com/ginuerzh/gost

Analyze the terminal output to locate any version of Github.com/ginuerzh/gost in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In Github.com/ginuerzh/gost, 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

An authentication bypass in the SSH service of gost v2.11.5 allows attackers to intercept communications via setting the HostKeyCallback function to ssh.InsecureIgnoreHostKey

CVE-2024-39223 Affected Github.com/ginuerzh/gost Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ginuerzh/gost
golang/github.com/ginuerzh/gost
Go
≤ 2.11.5

References

NVD — CVE-2024-39223 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-39223
Github.com/ginuerzh/gost Source Repository REPOSITORY
https://github.com/ginuerzh/gost/issues/1034
Github.com/ginuerzh/gost Source Repository REPOSITORY
https://gist.github.com/nyxfqq/a7242170b1118e78436a62dee4e09e8a
Github.com/ginuerzh/gost Source Repository REPOSITORY
https://github.com/ginuerzh/gost
Github.com/ginuerzh/gost Source Repository REPOSITORY
https://github.com/ginuerzh/gost/blob/729d0e70005607dc7c69fc1de62fd8fe21f85355/ssh.go#L229

Frequently Asked Questions

What is CVE-2024-39223?
CVE-2024-39223 is a security vulnerability in Github.com/ginuerzh/gost involving Missing key verification in gost under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Github.com/ginuerzh/gost versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/ginuerzh/gost.
What version fixes CVE-2024-39223?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/ginuerzh/gost affected?
Yes, github.com/ginuerzh/gost is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-39223?
CVE-2024-39223 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2024-39223?
CVE-2024-39223 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check Go dependencies for CVE-2024-39223?
Run the dependency tree command: 'inspect dependencies for github.com/ginuerzh/gost'. 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-8wxx-35qc-vp6r",
  "modified" : "2024-10-25T22:07:23Z",
  "published" : "2024-07-03T18:48:20Z",
  "aliases" : [ "CVE-2024-39223" ],
  "summary" : "Missing key verification in gost",
  "details" : "An authentication bypass in the SSH service of gost v2.11.5 allows attackers to intercept communications via setting the HostKeyCallback function to ssh.InsecureIgnoreHostKey",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ginuerzh/gost"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.11.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-39223"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ginuerzh/gost/issues/1034"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/nyxfqq/a7242170b1118e78436a62dee4e09e8a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ginuerzh/gost"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ginuerzh/gost/blob/729d0e70005607dc7c69fc1de62fd8fe21f85355/ssh.go#L229"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-289", "CWE-639" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-10-25T22:07:23Z",
    "nvd_published_at" : "2024-07-03T15:15:06Z"
  }
}