CVE-2018-3786: Egg scripts Command Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-c9j3-wqph-5xx9
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CVSS 9.8
CWE-78 CWE-77
Published
Advisory Summary

CVE-2018-3786 is a CRITICAL (CVSS 9.8) command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Egg scripts libraries in the npm ecosystem. The issue involves command injection in egg-scripts. Remediation is available by upgrading affected packages to version 2.8.1.

CVE-2018-3786 at a Glance

CVE Identifier CVE-2018-3786
GHSA Identifier GHSA-c9j3-wqph-5xx9
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Egg scripts
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-2018-3786

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

egg-scripts fixed: 2.8.1 
npm install egg-scripts@2.8.1
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 egg-scripts

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2018-3786, inspect your project dependencies using npm:

npm ls egg-scripts

Analyze the terminal output to locate any version of Egg scripts in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.1), your application is affected.

Note: The npm ls egg-scripts 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Egg scripts, 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

Versions of `egg-scripts` before 2.8.1 are vulnerable to command injection. This is only exploitable if a malicious argument is provided on the command line. Example: `eggctl start --daemon --stderr='/tmp/eggctl_stderr.log; touch /tmp/malicious'` ## Recommendation Update to version 2.8.1 or later.

CVE-2018-3786 Affected Egg scripts Versions

1 component(s)
Fixed Versions:
2.8.1
Product / Package Ecosystem Affected Versions Fixed Version
egg-scripts
npm/egg-scripts
npm
< 2.8.1
2.8.1

References

NVD — CVE-2018-3786 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3786
Egg scripts Source Repository REPOSITORY
https://github.com/eggjs/egg-scripts/pull/26
Security Fix Commit FIX COMMIT
https://github.com/eggjs/egg-scripts/commit/b98fd03d1e3aaed68004b881f0b3d42fe47341dd
hackerone.com/reports/388936 WEB
https://hackerone.com/reports/388936
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-c9j3-wqph-5xx9
Egg scripts Source Repository REPOSITORY
https://github.com/eggjs/egg-scripts/blob/2.8.1/History.md
www.npmjs.com/advisories/694 WEB
https://www.npmjs.com/advisories/694

Frequently Asked Questions

What is CVE-2018-3786?
CVE-2018-3786 is a security vulnerability in Egg scripts involving Command Injection in egg-scripts under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Egg scripts versions are affected?
Affected versions include releases prior to 2.8.1 across affected packages: egg-scripts.
What version fixes CVE-2018-3786?
Upgrading to 2.8.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is egg-scripts affected?
Yes, egg-scripts is affected in releases prior to 2.8.1. Upgrade your dependency to 2.8.1 or later.
What is the CVSS score of CVE-2018-3786?
CVE-2018-3786 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-2018-3786?
CVE-2018-3786 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2018-3786?
Run the dependency tree command: 'npm ls egg-scripts'. 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-c9j3-wqph-5xx9",
  "modified" : "2023-02-03T20:45:07Z",
  "published" : "2018-09-17T20:43:34Z",
  "aliases" : [ "CVE-2018-3786" ],
  "summary" : "Command Injection in egg-scripts",
  "details" : "Versions of `egg-scripts` before 2.8.1 are vulnerable to command injection. This is only exploitable if a malicious argument is provided on the command line.\n\n\nExample:\n`eggctl start --daemon --stderr='/tmp/eggctl_stderr.log; touch /tmp/malicious'`\n\n\n## Recommendation\n\nUpdate to version 2.8.1 or later.",
  "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" : "egg-scripts"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.8.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-3786"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eggjs/egg-scripts/pull/26"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eggjs/egg-scripts/commit/b98fd03d1e3aaed68004b881f0b3d42fe47341dd"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/388936"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-c9j3-wqph-5xx9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eggjs/egg-scripts/blob/2.8.1/History.md"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/694"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-77", "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:30:55Z",
    "nvd_published_at" : "2018-08-24T20:29:00Z"
  }
}