CVE-2019-10776: Git diff apply OS Command Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-84cm-v6jp-gjmr
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CVSS 9.8
CWE-78
Published
Advisory Summary

CVE-2019-10776 is a CRITICAL (CVSS 9.8) os command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Git diff apply libraries in the npm ecosystem. The issue involves os command injection in git-diff-apply. Remediation is available by upgrading affected packages to version 0.22.2.

CVE-2019-10776 at a Glance

CVE Identifier CVE-2019-10776
GHSA Identifier GHSA-84cm-v6jp-gjmr
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Git diff apply
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-2019-10776

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

git-diff-apply fixed: 0.22.2 
npm install git-diff-apply@0.22.2
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 git-diff-apply

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2019-10776, inspect your project dependencies using npm:

npm ls git-diff-apply

Analyze the terminal output to locate any version of Git diff apply in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.22.2), your application is affected.

Note: The npm ls git-diff-apply 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Git diff apply, 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

In "index.js" file line 240, the run command executes the git command with a user controlled variable called remoteUrl. This affects git-diff-apply all versions prior to 0.22.2.

CVE-2019-10776 Affected Git diff apply Versions

1 component(s)
Fixed Versions:
0.22.2
Product / Package Ecosystem Affected Versions Fixed Version
git-diff-apply
npm/git-diff-apply
npm
< 0.22.2
0.22.2

References

NVD — CVE-2019-10776 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-10776
Security Fix Commit FIX COMMIT
https://github.com/kellyselden/git-diff-apply/commit/106d61d3ae723b4257c2a13e67b95eb40a27e0b5
snyk.io/vuln/snyk-js-gitdif... WEB
https://snyk.io/vuln/SNYK-JS-GITDIFFAPPLY-540774
snyk.io/vuln/snyk-js-gitdif... WEB
https://snyk.io/vuln/SNYK-JS-GITDIFFAPPLY-540774,

Frequently Asked Questions

What is CVE-2019-10776?
CVE-2019-10776 is a security vulnerability in Git diff apply involving OS command injection in git-diff-apply under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Git diff apply versions are affected?
Affected versions include releases prior to 0.22.2 across affected packages: git-diff-apply.
What version fixes CVE-2019-10776?
Upgrading to 0.22.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is git-diff-apply affected?
Yes, git-diff-apply is affected in releases prior to 0.22.2. Upgrade your dependency to 0.22.2 or later.
What is the CVSS score of CVE-2019-10776?
CVE-2019-10776 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-2019-10776?
CVE-2019-10776 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2019-10776?
Run the dependency tree command: 'npm ls git-diff-apply'. 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-84cm-v6jp-gjmr",
  "modified" : "2021-08-19T17:14:36Z",
  "published" : "2020-02-14T23:09:24Z",
  "aliases" : [ "CVE-2019-10776" ],
  "summary" : "OS command injection in git-diff-apply",
  "details" : "In \"index.js\" file line 240, the run command executes the git command with a user controlled variable called remoteUrl. This affects git-diff-apply all versions prior to 0.22.2.",
  "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" : "git-diff-apply"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.22.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.22.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-10776"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kellyselden/git-diff-apply/commit/106d61d3ae723b4257c2a13e67b95eb40a27e0b5"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-GITDIFFAPPLY-540774"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-GITDIFFAPPLY-540774,"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-02-13T19:30:10Z",
    "nvd_published_at" : null
  }
}