CVE-2020-6948: Hashbrown cms Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-4gjv-5jjp-rcgh
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CVSS 9.8
CWE-20
Published
Advisory Summary

CVE-2020-6948 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-20: Improper Input Validation) affecting Hashbrown cms libraries in the npm ecosystem. The issue involves hashbrown cms rce. Remediation is available by upgrading affected packages to version 1.3.4.

CVE-2020-6948 at a Glance

CVE Identifier CVE-2020-6948
GHSA Identifier GHSA-4gjv-5jjp-rcgh
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-20: Improper Input Validation
Affected Product Hashbrown cms
Package Ecosystem npm
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-2020-6948

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

hashbrown-cms fixed: 1.3.4 
npm install hashbrown-cms@1.3.4
Verify Direct and Transitive Dependencies

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

npm ls hashbrown-cms

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-6948, inspect your project dependencies using npm:

npm ls hashbrown-cms

Analyze the terminal output to locate any version of Hashbrown cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.3.4), your application is affected.

Note: The npm ls hashbrown-cms command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Hashbrown cms, 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

A remote code execution issue was discovered in HashBrown CMS through 1.3.3. `Server/Entity/Deployer/GitDeployer.js` has a `Service.AppService.exec call` that mishandles the URL, repository, username, and password.

CVE-2020-6948 Affected Hashbrown cms Versions

1 component(s)
Fixed Versions:
1.3.4
Product / Package Ecosystem Affected Versions Fixed Version
hashbrown-cms
npm/hashbrown-cms
npm
< 1.3.4
1.3.4

References

NVD — CVE-2020-6948 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-6948
Hashbrown cms Source Repository REPOSITORY
https://github.com/HashBrownCMS/hashbrown-cms/issues/326
Security Fix Commit FIX COMMIT
https://github.com/HashBrownCMS/hashbrown-cms/commit/ff95bbad391fb7111355c643cadc02fe8792d758
Hashbrown cms Source Repository REPOSITORY
https://github.com/HashBrownCMS/hashbrown-cms

Frequently Asked Questions

What is CVE-2020-6948?
CVE-2020-6948 is a security vulnerability in Hashbrown cms involving HashBrown CMS RCE under CWE-20: Improper Input Validation.
Which Hashbrown cms versions are affected?
Affected versions include releases prior to 1.3.4 across affected packages: hashbrown-cms.
What version fixes CVE-2020-6948?
Upgrading to 1.3.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hashbrown-cms affected?
Yes, hashbrown-cms is affected in releases prior to 1.3.4. Upgrade your dependency to 1.3.4 or later.
What is the CVSS score of CVE-2020-6948?
CVE-2020-6948 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-2020-6948?
CVE-2020-6948 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check npm dependencies for CVE-2020-6948?
Run the dependency tree command: 'npm ls hashbrown-cms'. 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-4gjv-5jjp-rcgh",
  "modified" : "2023-07-12T20:51:04Z",
  "published" : "2022-05-24T17:06:08Z",
  "aliases" : [ "CVE-2020-6948" ],
  "summary" : "HashBrown CMS RCE",
  "details" : "A remote code execution issue was discovered in HashBrown CMS through 1.3.3. `Server/Entity/Deployer/GitDeployer.js` has a `Service.AppService.exec call` that mishandles the URL, repository, username, and password.",
  "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" : "npm",
      "name" : "hashbrown-cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.3.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.3.3"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-6948"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms/issues/326"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms/commit/ff95bbad391fb7111355c643cadc02fe8792d758"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/HashBrownCMS/hashbrown-cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-12T20:51:04Z",
    "nvd_published_at" : "2020-01-13T19:15:00Z"
  }
}