CVE-2021-33816: Dolibarr/dolibarr Dolibarr Remote PHP Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-vxr9-p2xw-m8cf
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CVSS 9.8
CWE-94
Published
Advisory Summary

CVE-2021-33816 is a CRITICAL (CVSS 9.8) dolibarr remote php code execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Dolibarr/dolibarr libraries in the Packagist ecosystem. The issue involves dolibarr remote php code execution. Remediation is available by upgrading affected packages to version 14.0.0.

CVE-2021-33816 at a Glance

CVE Identifier CVE-2021-33816
GHSA Identifier GHSA-vxr9-p2xw-m8cf
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Dolibarr/dolibarr
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-2021-33816

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

dolibarr/dolibarr fixed: 14.0.0 
Upgrade dolibarr/dolibarr to 14.0.0
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 dolibarr/dolibarr

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-33816, inspect your project dependencies for Dolibarr/dolibarr:

inspect dependencies for dolibarr/dolibarr

Analyze the terminal output to locate any version of Dolibarr/dolibarr in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.0.0), 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Dolibarr/dolibarr, 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 website builder module in Dolibarr 13.0.2 allows remote PHP code execution because of an incomplete protection mechanism in which system, exec, and shell_exec are blocked but backticks are not blocked.

CVE-2021-33816 Affected Dolibarr/dolibarr Versions

1 component(s)
Fixed Versions:
14.0.0
Product / Package Ecosystem Affected Versions Fixed Version
dolibarr/dolibarr
 Packagist
≥ 13.0.2
< 14.0.0
All 1 versions
13.0.2
14.0.0

References

NVD — CVE-2021-33816 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33816
Dolibarr/dolibarr Source Repository REPOSITORY
https://github.com/Dolibarr/dolibarr
Dolibarr/dolibarr Security Information SECURITY
https://trovent.github.io/security-advisories/TRSA-2106-01/TRSA-2106-01.txt
Dolibarr/dolibarr Security Information SECURITY
https://trovent.io/security-advisory-2106-01
seclists.org/fulldisclosure/2021... WEB
http://seclists.org/fulldisclosure/2021/Nov/39

Frequently Asked Questions

What is CVE-2021-33816?
CVE-2021-33816 is a security vulnerability in Dolibarr/dolibarr involving Dolibarr remote PHP code execution under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Dolibarr/dolibarr versions are affected?
Affected versions include releases prior to 14.0.0 across affected packages: dolibarr/dolibarr.
What version fixes CVE-2021-33816?
Upgrading to 14.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is dolibarr/dolibarr affected?
Yes, dolibarr/dolibarr is affected in releases prior to 14.0.0. Upgrade your dependency to 14.0.0 or later.
What is the CVSS score of CVE-2021-33816?
CVE-2021-33816 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-2021-33816?
CVE-2021-33816 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check Packagist dependencies for CVE-2021-33816?
Run the dependency tree command: 'inspect dependencies for dolibarr/dolibarr'. 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-vxr9-p2xw-m8cf",
  "modified" : "2024-04-24T18:39:36Z",
  "published" : "2022-05-24T19:20:28Z",
  "aliases" : [ "CVE-2021-33816" ],
  "summary" : "Dolibarr remote PHP code execution",
  "details" : "The website builder module in Dolibarr 13.0.2 allows remote PHP code execution because of an incomplete protection mechanism in which system, exec, and shell_exec are blocked but backticks are not blocked.",
  "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" : "dolibarr/dolibarr"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "13.0.2"
      }, {
        "fixed" : "14.0.0"
      } ]
    } ],
    "versions" : [ "13.0.2" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-33816"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Dolibarr/dolibarr"
  }, {
    "type" : "WEB",
    "url" : "https://trovent.github.io/security-advisories/TRSA-2106-01/TRSA-2106-01.txt"
  }, {
    "type" : "WEB",
    "url" : "https://trovent.io/security-advisory-2106-01"
  }, {
    "type" : "WEB",
    "url" : "http://seclists.org/fulldisclosure/2021/Nov/39"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-24T18:39:36Z",
    "nvd_published_at" : "2021-11-10T23:15:00Z"
  }
}