CVE-2017-16085: Tinyserver2 Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-g8wf-rcg3-qw4q
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CWE-22
Published
Advisory Summary

CVE-2017-16085 is a HIGH path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Tinyserver2 libraries in the npm ecosystem. The issue involves directory traversal in tinyserver2. Remediation is available by upgrading affected packages to version 0.6.0.

CVE-2017-16085 at a Glance

CVE Identifier CVE-2017-16085
GHSA Identifier GHSA-g8wf-rcg3-qw4q
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Tinyserver2
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2017-16085

To remediate this vulnerability, upgrade all affected Tinyserver2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

tinyserver2 fixed: 0.6.0 
npm install tinyserver2@0.6.0
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 tinyserver2

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2017-16085, inspect your project dependencies using npm:

npm ls tinyserver2

Analyze the terminal output to locate any version of Tinyserver2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.0), your application is affected.

Note: The npm ls tinyserver2 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Tinyserver2, 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

Affected versions of `tinyserver2` resolve relative file paths, resulting in a directory traversal vulnerability. A malicious actor can use this vulnerability to access files outside of the intended directory root, which may result in the disclosure of private files on the vulnerable system. **Example request:** ```http GET /../../../../../../../../../../etc/passwd HTTP/1.1 host:foo ``` ## Recommendation Update to v0.6.0 or later.

CVE-2017-16085 Affected Tinyserver2 Versions

1 component(s)
Fixed Versions:
0.6.0
Product / Package Ecosystem Affected Versions Fixed Version
tinyserver2
npm/tinyserver2
npm
< 0.6.0
0.6.0

References

NVD — CVE-2017-16085 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16085
Tinyserver2 Source Repository REPOSITORY
https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/tinyserver2
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-g8wf-rcg3-qw4q
www.npmjs.com/advisories/371 WEB
https://www.npmjs.com/advisories/371

Frequently Asked Questions

What is CVE-2017-16085?
CVE-2017-16085 is a security vulnerability in Tinyserver2 involving Directory Traversal in tinyserver2 under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Tinyserver2 versions are affected?
Affected versions include releases prior to 0.6.0 across affected packages: tinyserver2.
What version fixes CVE-2017-16085?
Upgrading to 0.6.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tinyserver2 affected?
Yes, tinyserver2 is affected in releases prior to 0.6.0. Upgrade your dependency to 0.6.0 or later.
What CWE is associated with CVE-2017-16085?
CVE-2017-16085 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2017-16085?
Run the dependency tree command: 'npm ls tinyserver2'. 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-g8wf-rcg3-qw4q",
  "modified" : "2023-09-06T20:05:30Z",
  "published" : "2018-07-24T15:01:34Z",
  "aliases" : [ "CVE-2017-16085" ],
  "summary" : "Directory Traversal in tinyserver2",
  "details" : "Affected versions of `tinyserver2` resolve relative file paths, resulting in a directory traversal vulnerability. A malicious actor can use this vulnerability to access files outside of the intended directory root, which may result in the disclosure of private files on the vulnerable system.\n\n**Example request:**\n```http\nGET /../../../../../../../../../../etc/passwd HTTP/1.1\nhost:foo\n```\n\n\n## Recommendation\n\nUpdate to v0.6.0 or later.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tinyserver2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.6.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.5.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-16085"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/tinyserver2"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-g8wf-rcg3-qw4q"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/371"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:36:37Z",
    "nvd_published_at" : null
  }
}