CVE-2017-1000189: Ejs Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-6x77-rpqf-j6mw
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CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2017-1000189 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-20: Improper Input Validation) affecting Ejs libraries in the npm ecosystem. The issue involves ejs vulnerable to dos due to weak input validation. Remediation is available by upgrading affected packages to version 2.5.5.

CVE-2017-1000189 at a Glance

CVE Identifier CVE-2017-1000189
GHSA Identifier GHSA-6x77-rpqf-j6mw
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Ejs
Package Ecosystem npm
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2017-1000189

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

ejs fixed: 2.5.5 
npm install ejs@2.5.5
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 ejs

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2017-1000189, inspect your project dependencies using npm:

npm ls ejs

Analyze the terminal output to locate any version of Ejs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5.5), your application is affected.

Note: The npm ls ejs 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 Ejs, 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

nodejs ejs version older than 2.5.5 is vulnerable to a denial-of-service due to weak input validation in `ejs.renderFile()`

CVE-2017-1000189 Affected Ejs Versions

1 component(s)
Fixed Versions:
2.5.5
Product / Package Ecosystem Affected Versions Fixed Version
ejs
npm/ejs
npm
< 2.5.5
2.5.5

References

NVD — CVE-2017-1000189 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-1000189
Security Fix Commit FIX COMMIT
https://github.com/mde/ejs/commit/49264e0037e313a0a3e033450b5c184112516d8f
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-6x77-rpqf-j6mw
Ejs Source Repository REPOSITORY
https://github.com/mde/ejs
Ejs Security Information SECURITY
https://web.archive.org/web/20171123041449/http://www.securityfocus.com/bid/101893

Frequently Asked Questions

What is CVE-2017-1000189?
CVE-2017-1000189 is a security vulnerability in Ejs involving ejs vulnerable to DoS due to weak input validation under CWE-20: Improper Input Validation.
Which Ejs versions are affected?
Affected versions include releases prior to 2.5.5 across affected packages: ejs.
What version fixes CVE-2017-1000189?
Upgrading to 2.5.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ejs affected?
Yes, ejs is affected in releases prior to 2.5.5. Upgrade your dependency to 2.5.5 or later.
What is the CVSS score of CVE-2017-1000189?
CVE-2017-1000189 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2017-1000189?
CVE-2017-1000189 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-2017-1000189?
Run the dependency tree command: 'npm ls ejs'. 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-6x77-rpqf-j6mw",
  "modified" : "2023-09-08T21:00:26Z",
  "published" : "2018-03-05T18:54:33Z",
  "aliases" : [ "CVE-2017-1000189" ],
  "summary" : "ejs vulnerable to DoS due to weak input validation",
  "details" : "nodejs ejs version older than 2.5.5 is vulnerable to a denial-of-service due to weak input validation in `ejs.renderFile()`",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ejs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.5.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-1000189"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mde/ejs/commit/49264e0037e313a0a3e033450b5c184112516d8f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-6x77-rpqf-j6mw"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mde/ejs"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20171123041449/http://www.securityfocus.com/bid/101893"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:20:34Z",
    "nvd_published_at" : null
  }
}