CVE-2022-33127: Diffy Improper Handling Of Double Quotes Vulnerability

CRITICAL
Advisory Identifier: GHSA-5ww9-9qp2-x524
Share
CVSS 9.8
Published
Advisory Summary

CVE-2022-33127 is a CRITICAL (CVSS 9.8) improper handling of double quotes vulnerability (General Security Weakness) affecting Diffy libraries in the RubyGems ecosystem. The issue involves improper handling of double quotes in file name in diffy in windows environment. Remediation is available by upgrading affected packages to version 3.4.1.

CVE-2022-33127 at a Glance

CVE Identifier CVE-2022-33127
GHSA Identifier GHSA-5ww9-9qp2-x524
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Diffy
Package Ecosystem RubyGems
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-2022-33127

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

diffy fixed: 3.4.1 
Upgrade diffy to 3.4.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for diffy

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-33127, inspect your project dependencies for Diffy:

inspect dependencies for diffy

Analyze the terminal output to locate any version of Diffy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Diffy, 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

The function that calls the diff tool in versions of Diffy prior to 3.4.1 does not properly handle double quotes in a filename when run in a Windows environment. This allows attackers to execute arbitrary commands via a crafted string.

CVE-2022-33127 Affected Diffy Versions

1 component(s)
Fixed Versions:
3.4.1
Product / Package Ecosystem Affected Versions Fixed Version
diffy
gem/diffy
RubyGems
< 3.4.1
3.4.1

References

NVD — CVE-2022-33127 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-33127
Security Fix Commit FIX COMMIT
https://github.com/samg/diffy/commit/478f392082b66d38f54a02b4bb9c41be32fd6593
Diffy Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/diffy/CVE-2022-33127.yml
Diffy Source Repository REPOSITORY
https://github.com/samg/diffy
Diffy Source Repository REPOSITORY
https://github.com/samg/diffy/blob/56fd935aea256742f7352b050592542d3d153bf6/CHANGELOG#L1

Frequently Asked Questions

What is CVE-2022-33127?
CVE-2022-33127 is a security vulnerability in Diffy involving Improper handling of double quotes in file name in Diffy in Windows environment under General Security Weakness.
Which Diffy versions are affected?
Affected versions include releases prior to 3.4.1 across affected packages: diffy.
What version fixes CVE-2022-33127?
Upgrading to 3.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is diffy affected?
Yes, diffy is affected in releases prior to 3.4.1. Upgrade your dependency to 3.4.1 or later.
What is the CVSS score of CVE-2022-33127?
CVE-2022-33127 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-2022-33127?
CVE-2022-33127 is classified under General Security Weakness.
How can I check RubyGems dependencies for CVE-2022-33127?
Run the dependency tree command: 'inspect dependencies for diffy'. 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-5ww9-9qp2-x524",
  "modified" : "2022-07-05T18:02:56Z",
  "published" : "2022-06-24T00:00:31Z",
  "aliases" : [ "CVE-2022-33127" ],
  "summary" : "Improper handling of double quotes in file name in Diffy in Windows environment",
  "details" : "The function that calls the diff tool in versions of Diffy prior to 3.4.1 does not properly handle double quotes in a filename when run in a Windows environment. This allows attackers to execute arbitrary commands via a crafted string.",
  "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" : "RubyGems",
      "name" : "diffy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-33127"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/samg/diffy/commit/478f392082b66d38f54a02b4bb9c41be32fd6593"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/diffy/CVE-2022-33127.yml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/samg/diffy"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/samg/diffy/blob/56fd935aea256742f7352b050592542d3d153bf6/CHANGELOG#L1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-25T07:23:10Z",
    "nvd_published_at" : "2022-06-23T17:15:00Z"
  }
}