CVE-2020-8149: Logkitty Arbitrary Shell Command Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-v8v8-6859-qxm4
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CVSS 9.8
CWE-94
Published
Advisory Summary

CVE-2020-8149 is a CRITICAL (CVSS 9.8) arbitrary shell command execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Logkitty libraries in the npm ecosystem. The issue involves arbitrary shell command execution in logkitty. Remediation is available by upgrading affected packages to version 0.7.1.

CVE-2020-8149 at a Glance

CVE Identifier CVE-2020-8149
GHSA Identifier GHSA-v8v8-6859-qxm4
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Logkitty
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-2020-8149

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

logkitty fixed: 0.7.1 
npm install logkitty@0.7.1
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 logkitty

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-8149, inspect your project dependencies using npm:

npm ls logkitty

Analyze the terminal output to locate any version of Logkitty in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.1), your application is affected.

Note: The npm ls logkitty 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Logkitty, 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

Lack of output sanitization allowed an attack to execute arbitrary shell commands via the logkitty npm package before version 0.7.1.

CVE-2020-8149 Affected Logkitty Versions

1 component(s)
Fixed Versions:
0.7.1
Product / Package Ecosystem Affected Versions Fixed Version
logkitty
npm/logkitty
npm
< 0.7.1
0.7.1

References

NVD — CVE-2020-8149 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8149
Logkitty Source Repository REPOSITORY
https://github.com/zamotany/logkitty/pull/18
Security Fix Commit FIX COMMIT
https://github.com/zamotany/logkitty/commit/ef2f673e25c629544dd3de6429999318447dd6bf
hackerone.com/reports/825729 WEB
https://hackerone.com/reports/825729

Frequently Asked Questions

What is CVE-2020-8149?
CVE-2020-8149 is a security vulnerability in Logkitty involving Arbitrary shell command execution in logkitty under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Logkitty versions are affected?
Affected versions include releases prior to 0.7.1 across affected packages: logkitty.
What version fixes CVE-2020-8149?
Upgrading to 0.7.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is logkitty affected?
Yes, logkitty is affected in releases prior to 0.7.1. Upgrade your dependency to 0.7.1 or later.
What is the CVSS score of CVE-2020-8149?
CVE-2020-8149 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-2020-8149?
CVE-2020-8149 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check npm dependencies for CVE-2020-8149?
Run the dependency tree command: 'npm ls logkitty'. 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-v8v8-6859-qxm4",
  "modified" : "2023-09-08T20:47:27Z",
  "published" : "2020-06-05T14:47:02Z",
  "aliases" : [ "CVE-2020-8149" ],
  "summary" : "Arbitrary shell command execution in logkitty",
  "details" : "Lack of output sanitization allowed an attack to execute arbitrary shell commands via the logkitty npm package before version 0.7.1.",
  "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" : "logkitty"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-8149"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zamotany/logkitty/pull/18"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zamotany/logkitty/commit/ef2f673e25c629544dd3de6429999318447dd6bf"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/825729"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-04T19:33:24Z",
    "nvd_published_at" : null
  }
}