CVE-2022-42092: Backdrop/backdrop Backdrop CMS Unrestricted File Upload Vulnerability

HIGH
Advisory Identifier: GHSA-33c9-rppf-m7fq
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CVSS 7.2
CWE-434
Published
Advisory Summary

CVE-2022-42092 is a HIGH (CVSS 7.2) backdrop cms unrestricted file upload vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Backdrop/backdrop libraries in the Packagist ecosystem. The issue involves backdrop cms unrestricted file upload vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2022-42092 at a Glance

CVE Identifier CVE-2022-42092
GHSA Identifier GHSA-33c9-rppf-m7fq
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Backdrop/backdrop
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
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-2022-42092

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

backdrop/backdrop fixed: Latest secure release 
Upgrade backdrop/backdrop to 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: 

inspect dependencies for backdrop/backdrop

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-42092, inspect your project dependencies for Backdrop/backdrop:

inspect dependencies for backdrop/backdrop

Analyze the terminal output to locate any version of Backdrop/backdrop 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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Backdrop/backdrop, 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

Backdrop CMS 1.22.0 has Unrestricted File Upload vulnerability via `themes` that allows attackers to achieve Remote Code Execution.

CVE-2022-42092 Affected Backdrop/backdrop Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
backdrop/backdrop
 Packagist
≤ 1.22.0

References

NVD — CVE-2022-42092 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-42092
Backdrop/backdrop Source Repository REPOSITORY
https://github.com/backdrop-ops/backdrop-composer
grimthereaperteam.medium.com/backdrop-cms-1-22-0... WEB
https://grimthereaperteam.medium.com/backdrop-cms-1-22-0-unrestricted-file-upload-themes-ad42a599561c

Frequently Asked Questions

What is CVE-2022-42092?
CVE-2022-42092 is a security vulnerability in Backdrop/backdrop involving Backdrop CMS Unrestricted File Upload vulnerability under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Backdrop/backdrop versions are affected?
Affected versions include releases prior to current release patches across affected packages: backdrop/backdrop.
What version fixes CVE-2022-42092?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is backdrop/backdrop affected?
Yes, backdrop/backdrop 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-2022-42092?
CVE-2022-42092 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2022-42092?
CVE-2022-42092 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check Packagist dependencies for CVE-2022-42092?
Run the dependency tree command: 'inspect dependencies for backdrop/backdrop'. 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-33c9-rppf-m7fq",
  "modified" : "2023-01-18T06:13:30Z",
  "published" : "2022-10-07T18:15:39Z",
  "aliases" : [ "CVE-2022-42092" ],
  "summary" : "Backdrop CMS Unrestricted File Upload vulnerability",
  "details" : "Backdrop CMS 1.22.0 has Unrestricted File Upload vulnerability via `themes` that allows attackers to achieve Remote Code Execution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "backdrop/backdrop"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.22.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-42092"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/backdrop-ops/backdrop-composer"
  }, {
    "type" : "WEB",
    "url" : "https://grimthereaperteam.medium.com/backdrop-cms-1-22-0-unrestricted-file-upload-themes-ad42a599561c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-18T06:13:30Z",
    "nvd_published_at" : "2022-10-07T18:15:00Z"
  }
}