Vulnerabilities in pkg:npm/statics-server

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Advisory Identifier: GHSA-393x-fr59-r8fg
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Advisory Summary

CVE-2018-3771 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Statics server libraries in the npm ecosystem. The issue involves statics-server cross-site scripting vulnerability. Remediation is available in the latest vendor maintenance releases.

3 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/statics-server

3 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-393x-fr59-r8fg CVE-2018-3771 MODERATE statics-server Cross-site Scripting vulnerability
GHSA-j27j-4w6m-8fc4 CVE-2019-15596 MODERATE Path Traversal in statics-server
GHSA-74cp-qw7f-7hpw - MODERATE Path Traversal in statics-server

CVE-2018-3771 at a Glance

CVE Identifier CVE-2018-3771
GHSA Identifier GHSA-393x-fr59-r8fg
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 Statics server
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:3.0/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-2018-3771

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

statics-server fixed: Latest secure release 
npm install statics-server@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: 

npm ls statics-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2018-3771, inspect your project dependencies using npm:

npm ls statics-server

Analyze the terminal output to locate any version of Statics server 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: The npm ls statics-server 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 Statics server, 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 XSS in statics-server <= 0.0.9 can be used via injected iframe in the filename when statics-server displays directory index in the browser. Statics-server does not implement any HTML escaping when displays directory index in the browser. Variable `v` is used in `<a href>` element without escaping, which allows to embed HTML `<iframe>` tag with `src` attribute points to another HTML file in the directory. This file can contain malicious JavaScript code, which will be executed: ```js // ./node_modules/statics-server/index.js, line 18: if(fs.lstatSync(staticPath).isDirectory()){ var files=fs.readdirSync(staticPath); var lis=''; files.forEach((v,i)=>{ if(fs.lstatSync(path.resolve(staticPath,v)).isDirectory()){ lis+=`<li><a href="${req.url}${v}/">${v}/</a></li>`; }else { lis+=`<li><a href="${req.url}${v}">${v}</a></li>` } }); (...) ```

CVE-2018-3771 Affected Statics server Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
statics-server
npm/statics-server
npm
≤ 0.0.9

References

NVD — CVE-2018-3771 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3771
hackerone.com/reports/355458 WEB
https://hackerone.com/reports/355458

Frequently Asked Questions

What is CVE-2018-3771?
CVE-2018-3771 is a security vulnerability in Statics server involving statics-server Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Statics server versions are affected?
Affected versions include releases prior to current release patches across affected packages: statics-server.
What version fixes CVE-2018-3771?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is statics-server affected?
Yes, statics-server 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-2018-3771?
CVE-2018-3771 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-3771?
CVE-2018-3771 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-2018-3771?
Run the dependency tree command: 'npm ls statics-server'. 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-393x-fr59-r8fg",
  "modified" : "2024-04-22T23:08:32Z",
  "published" : "2022-05-13T01:32:20Z",
  "aliases" : [ "CVE-2018-3771" ],
  "summary" : "statics-server Cross-site Scripting vulnerability",
  "details" : "An XSS in statics-server <= 0.0.9 can be used via injected iframe in the filename when statics-server displays directory index in the browser. Statics-server does not implement any HTML escaping when displays directory index in the browser. Variable `v` is used in `<a href>` element without escaping, which allows to embed HTML `<iframe>` tag with `src` attribute points to another HTML file in the directory. This file can contain malicious JavaScript code, which will be executed:\n\n```js\n// ./node_modules/statics-server/index.js, line 18:\n\n    if(fs.lstatSync(staticPath).isDirectory()){\n        var files=fs.readdirSync(staticPath);\n        var lis='';\n        files.forEach((v,i)=>{\n            if(fs.lstatSync(path.resolve(staticPath,v)).isDirectory()){\n                lis+=`<li><a href=\"${req.url}${v}/\">${v}/</a></li>`;\n            }else {\n                lis+=`<li><a href=\"${req.url}${v}\">${v}</a></li>`\n            }\n        });\n\n        (...)\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "statics-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.0.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-3771"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/355458"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-22T23:08:32Z",
    "nvd_published_at" : "2018-07-20T22:29:00Z"
  }
}