CVE-2020-28360: Private ip Server-Side Request Forgery Vulnerability

CRITICAL
Advisory Identifier: GHSA-43ch-2h55-2vj7
Share
CVSS 9.8
CWE-918
Published
Advisory Summary

CVE-2020-28360 is a CRITICAL (CVSS 9.8) server-side request forgery vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Private ip libraries in the npm ecosystem. The issue involves server-side request forgery in private-ip. Remediation is available by upgrading affected packages to version 2.0.0.

CVE-2020-28360 at a Glance

CVE Identifier CVE-2020-28360
GHSA Identifier GHSA-43ch-2h55-2vj7
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Private ip
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-2020-28360

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

private-ip fixed: 2.0.0 
npm install private-ip@2.0.0
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 private-ip

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-28360, inspect your project dependencies using npm:

npm ls private-ip

Analyze the terminal output to locate any version of Private ip in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), your application is affected.

Note: The npm ls private-ip 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Private ip, 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

Insufficient RegEx in private-ip npm package v1.0.5 and below insufficiently filters reserved IP ranges resulting in indeterminate SSRF. An attacker can perform a large range of requests to ARIN reserved IP ranges, resulting in an indeterminable number of critical attack vectors, allowing remote attackers to request server-side resources or potentially execute arbitrary code through various SSRF techniques.

CVE-2020-28360 Affected Private ip Versions

1 component(s)
Fixed Versions:
2.0.0
Product / Package Ecosystem Affected Versions Fixed Version
private-ip
npm/private-ip
npm
< 2.0.0
2.0.0

References

NVD — CVE-2020-28360 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28360
Security Fix Commit FIX COMMIT
https://github.com/frenchbread/private-ip/commit/840664c4b9ba7888c41cfee9666e9a593db133e9
Private ip Source Repository REPOSITORY
https://github.com/frenchbread/private-ip
johnjhacking.com/blog/cve-2020-28360 WEB
https://johnjhacking.com/blog/cve-2020-28360
www.npmjs.com/package/private-ip WEB
https://www.npmjs.com/package/private-ip

Frequently Asked Questions

What is CVE-2020-28360?
CVE-2020-28360 is a security vulnerability in Private ip involving Server-Side Request Forgery in private-ip under CWE-918: Server-Side Request Forgery (SSRF).
Which Private ip versions are affected?
Affected versions include releases prior to 2.0.0 across affected packages: private-ip.
What version fixes CVE-2020-28360?
Upgrading to 2.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is private-ip affected?
Yes, private-ip is affected in releases prior to 2.0.0. Upgrade your dependency to 2.0.0 or later.
What is the CVSS score of CVE-2020-28360?
CVE-2020-28360 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-2020-28360?
CVE-2020-28360 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check npm dependencies for CVE-2020-28360?
Run the dependency tree command: 'npm ls private-ip'. 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-43ch-2h55-2vj7",
  "modified" : "2021-03-29T21:49:55Z",
  "published" : "2021-04-13T15:18:17Z",
  "aliases" : [ "CVE-2020-28360" ],
  "summary" : "Server-Side Request Forgery in private-ip",
  "details" : "Insufficient RegEx in private-ip npm package v1.0.5 and below insufficiently filters reserved IP ranges resulting in indeterminate SSRF. An attacker can perform a large range of requests to ARIN reserved IP ranges, resulting in an indeterminable number of critical attack vectors, allowing remote attackers to request server-side resources or potentially execute arbitrary code through various SSRF techniques.",
  "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" : "private-ip"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-28360"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/frenchbread/private-ip/commit/840664c4b9ba7888c41cfee9666e9a593db133e9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/frenchbread/private-ip"
  }, {
    "type" : "WEB",
    "url" : "https://johnjhacking.com/blog/cve-2020-28360"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/package/private-ip"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-03-29T21:49:55Z",
    "nvd_published_at" : "2020-11-23T21:15:00Z"
  }
}