Vulnerabilities in pkg:npm/knockout

PACKAGE
Advisory Identifier: GHSA-vcjj-xf2r-mwvc
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Advisory Summary

CVE-2019-14862 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Knockout libraries in the npm ecosystem. The issue involves xss in knockout. Remediation is available by upgrading affected packages to version 3.5.0.

2 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/knockout

2 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/knockout. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-vcjj-xf2r-mwvc CVE-2019-14862 MODERATE XSS in knockout
GHSA-qfmr-6qvh-49gm - MODERATE XSS

CVE-2019-14862 at a Glance

CVE Identifier CVE-2019-14862
GHSA Identifier GHSA-vcjj-xf2r-mwvc
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Knockout
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2019-14862

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

knockout fixed: 3.5.0 
npm install knockout@3.5.0
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 knockout

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2019-14862, inspect your project dependencies using npm:

npm ls knockout

Analyze the terminal output to locate any version of Knockout in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.5.0), your application is affected.

Note: The npm ls knockout 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Knockout, 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

There is a vulnerability in knockout before version 3.5.0-beta, where after escaping the context of the web application, the web application delivers data to its users along with other trusted dynamic content, without validating it.

CVE-2019-14862 Affected Knockout Versions

1 component(s)
Fixed Versions:
3.5.0
Product / Package Ecosystem Affected Versions Fixed Version
knockout
npm/knockout
npm
< 3.5.0
3.5.0

References

NVD — CVE-2019-14862 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-14862
Knockout Source Repository REPOSITORY
https://github.com/knockout/knockout/issues/1244
Knockout Source Repository REPOSITORY
https://github.com/knockout/knockout/pull/2345
Security Fix Commit FIX COMMIT
https://github.com/knockout/knockout/commit/7e280b2b8a04cc19176b5171263a5c68bda98efb
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14862
snyk.io/vuln/npm:knockout:2... WEB
https://snyk.io/vuln/npm:knockout:20180213
Knockout Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2022.html
Knockout Security Information SECURITY
https://www.oracle.com/security-alerts/cpujan2021.html
Knockout Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2020.html
www.whitesourcesoftware.com/vulnerability-datab... WEB
https://www.whitesourcesoftware.com/vulnerability-database/WS-2019-0015

Frequently Asked Questions

What is CVE-2019-14862?
CVE-2019-14862 is a security vulnerability in Knockout involving XSS in knockout under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Knockout versions are affected?
Affected versions include releases prior to 3.5.0 across affected packages: knockout.
What version fixes CVE-2019-14862?
Upgrading to 3.5.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is knockout affected?
Yes, knockout is affected in releases prior to 3.5.0. Upgrade your dependency to 3.5.0 or later.
What is the CVSS score of CVE-2019-14862?
CVE-2019-14862 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2019-14862?
CVE-2019-14862 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2019-14862?
Run the dependency tree command: 'npm ls knockout'. 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-vcjj-xf2r-mwvc",
  "modified" : "2022-04-25T23:07:31Z",
  "published" : "2020-04-01T15:47:45Z",
  "aliases" : [ "CVE-2019-14862" ],
  "summary" : "XSS in knockout",
  "details" : "There is a vulnerability in knockout before version 3.5.0-beta, where after escaping the context of the web application, the web application delivers data to its users along with other trusted dynamic content, without validating it.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "knockout"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.5.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-14862"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knockout/knockout/issues/1244"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knockout/knockout/pull/2345"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/knockout/knockout/commit/7e280b2b8a04cc19176b5171263a5c68bda98efb"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14862"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/npm:knockout:20180213"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuapr2022.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujan2021.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujul2020.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.whitesourcesoftware.com/vulnerability-database/WS-2019-0015"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-04-01T15:46:54Z",
    "nvd_published_at" : "2020-01-02T15:15:00Z"
  }
}