CVE-2021-42171: Tribalsystems/zenario Unrestricted Upload Of File With Vulnerability

CRITICAL
Advisory Identifier: GHSA-rgg3-3wh7-w935
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CVSS 9.8
CWE-434
Published
Advisory Summary

CVE-2021-42171 is a CRITICAL (CVSS 9.8) unrestricted upload of file with vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Tribalsystems/zenario libraries in the Packagist ecosystem. The issue involves unrestricted upload of file with dangerous type in zenario cms. Remediation is available by upgrading affected packages to version 9.0.55143.

CVE-2021-42171 at a Glance

CVE Identifier CVE-2021-42171
GHSA Identifier GHSA-rgg3-3wh7-w935
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Tribalsystems/zenario
Package Ecosystem Packagist
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-2021-42171

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

tribalsystems/zenario fixed: 9.0.55143 
Upgrade tribalsystems/zenario to 9.0.55143
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 tribalsystems/zenario

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-42171, inspect your project dependencies for Tribalsystems/zenario:

inspect dependencies for tribalsystems/zenario

Analyze the terminal output to locate any version of Tribalsystems/zenario in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.0.55143), 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 Tribalsystems/zenario, 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

Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run commands, browse system files, browse local resources, attack other servers, and exploit the local vulnerabilities, and so forth.

CVE-2021-42171 Affected Tribalsystems/zenario Versions

1 component(s)
Fixed Versions:
9.0.55143
Product / Package Ecosystem Affected Versions Fixed Version
tribalsystems/zenario
 Packagist
< 9.0.55143
9.0.55143

References

NVD — CVE-2021-42171 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42171
Tribalsystems/zenario Source Repository REPOSITORY
https://github.com/hieuminhnv/Zenario-CMS-9.0-last-version/issues/2
Security Fix Commit FIX COMMIT
https://github.com/TribalSystems/Zenario/commit/4566d8a9ac6755f098b3373252fdb17754a77007
Tribalsystems/zenario Source Repository REPOSITORY
https://github.com/TribalSystems/Zenario
Tribalsystems/zenario Release RELEASE
https://github.com/TribalSystems/Zenario/releases/tag/9.0.55141
minhnq22.medium.com/file-upload-to-rce-... WEB
https://minhnq22.medium.com/file-upload-to-rce-on-zenario-9-0-54156-cms-fa05fcc6cf74
Tribalsystems/zenario Security Information SECURITY
http://packetstormsecurity.com/files/166617/Zenario-CMS-9.0.54156-Remote-Code-Execution.html

Frequently Asked Questions

What is CVE-2021-42171?
CVE-2021-42171 is a security vulnerability in Tribalsystems/zenario involving Unrestricted Upload of File with Dangerous Type in Zenario CMS under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Tribalsystems/zenario versions are affected?
Affected versions include releases prior to 9.0.55143 across affected packages: tribalsystems/zenario.
What version fixes CVE-2021-42171?
Upgrading to 9.0.55143 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tribalsystems/zenario affected?
Yes, tribalsystems/zenario is affected in releases prior to 9.0.55143. Upgrade your dependency to 9.0.55143 or later.
What is the CVSS score of CVE-2021-42171?
CVE-2021-42171 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-2021-42171?
CVE-2021-42171 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-2021-42171?
Run the dependency tree command: 'inspect dependencies for tribalsystems/zenario'. 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-rgg3-3wh7-w935",
  "modified" : "2022-03-28T22:21:50Z",
  "published" : "2022-03-15T00:00:58Z",
  "aliases" : [ "CVE-2021-42171" ],
  "summary" : "Unrestricted Upload of File with Dangerous Type in Zenario CMS",
  "details" : "Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run commands, browse system files, browse local resources, attack other servers, and exploit the local vulnerabilities, and so forth.",
  "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" : "Packagist",
      "name" : "tribalsystems/zenario"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "9.0.55143"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.0.54156"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-42171"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hieuminhnv/Zenario-CMS-9.0-last-version/issues/2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TribalSystems/Zenario/commit/4566d8a9ac6755f098b3373252fdb17754a77007"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TribalSystems/Zenario"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TribalSystems/Zenario/releases/tag/9.0.55141"
  }, {
    "type" : "WEB",
    "url" : "https://minhnq22.medium.com/file-upload-to-rce-on-zenario-9-0-54156-cms-fa05fcc6cf74"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/166617/Zenario-CMS-9.0.54156-Remote-Code-Execution.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-28T22:21:50Z",
    "nvd_published_at" : "2022-03-14T15:15:00Z"
  }
}