CVE-2020-28434: Gitblame Gitblame Susceptible To Command Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-3486-rvxc-hrrj
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CVSS 9.8
CWE-77
Published
Advisory Summary

CVE-2020-28434 is a CRITICAL (CVSS 9.8) gitblame susceptible to command injection vulnerability (CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')) affecting Gitblame libraries in the npm ecosystem. The issue involves gitblame susceptible to command injection. Remediation is available in the latest vendor maintenance releases.

CVE-2020-28434 at a Glance

CVE Identifier CVE-2020-28434
GHSA Identifier GHSA-3486-rvxc-hrrj
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Affected Product Gitblame
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-2020-28434

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

gitblame fixed: Latest secure release 
npm install gitblame@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 gitblame

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-28434, inspect your project dependencies using npm:

npm ls gitblame

Analyze the terminal output to locate any version of Gitblame 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 gitblame 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-77: Improper Neutralization of Special Elements used in a Command ('Command Injection'), where the product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. In Gitblame, 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

A command injection vulnerability affects all versions of package gitblame. The injection point is located in line 15 in lib/gitblame.js.

CVE-2020-28434 Affected Gitblame Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
gitblame
npm/gitblame
npm
≤ 0.1.1

References

NVD — CVE-2020-28434 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28434
Gitblame Source Repository REPOSITORY
https://github.com/xjamundx/gitblame
Gitblame Source Repository REPOSITORY
https://github.com/xjamundx/gitblame/blob/master/lib/gitblame.js#L15
Gitblame Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-GITBLAME-1050430

Frequently Asked Questions

What is CVE-2020-28434?
CVE-2020-28434 is a security vulnerability in Gitblame involving gitblame susceptible to command injection under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection').
Which Gitblame versions are affected?
Affected versions include releases prior to current release patches across affected packages: gitblame.
What version fixes CVE-2020-28434?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is gitblame affected?
Yes, gitblame 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-2020-28434?
CVE-2020-28434 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-2020-28434?
CVE-2020-28434 is classified under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') (The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2020-28434?
Run the dependency tree command: 'npm ls gitblame'. 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-3486-rvxc-hrrj",
  "modified" : "2022-08-10T17:59:03Z",
  "published" : "2022-08-03T00:00:57Z",
  "aliases" : [ "CVE-2020-28434" ],
  "summary" : "gitblame susceptible to command injection",
  "details" : "A command injection vulnerability affects all versions of package gitblame. The injection point is located in line 15 in lib/gitblame.js.",
  "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" : "gitblame"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-28434"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/xjamundx/gitblame"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/xjamundx/gitblame/blob/master/lib/gitblame.js#L15"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-GITBLAME-1050430"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-77" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-08-10T17:59:03Z",
    "nvd_published_at" : "2022-08-02T14:15:00Z"
  }
}