CVE-2021-44892: Topthink/framework Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-75jp-87w2-c6x2
Share
CVSS 8.8
Published
Advisory Summary

CVE-2021-44892 is a HIGH (CVSS 8.8) remote code execution vulnerability (General Security Weakness) affecting Topthink/framework libraries in the Packagist ecosystem. The issue involves thinkphp remote code execution (rce) vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2021-44892 at a Glance

CVE Identifier CVE-2021-44892
GHSA Identifier GHSA-75jp-87w2-c6x2
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification General Security Weakness
Affected Product Topthink/framework
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2021-44892

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

topthink/framework fixed: Latest secure release 
Upgrade topthink/framework 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 topthink/framework

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-44892, inspect your project dependencies for Topthink/framework:

inspect dependencies for topthink/framework

Analyze the terminal output to locate any version of Topthink/framework 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 General Security Weakness. In Topthink/framework, 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

A Remote Code Execution (RCE) vulnerability exists in ThinkPHP 3.x.x via value[_filename] in index.php, which could let a malicious user obtain server control privileges.

CVE-2021-44892 Affected Topthink/framework Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
topthink/framework
 Packagist
≤ 3.2.3

References

NVD — CVE-2021-44892 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-44892
Topthink/framework Source Repository REPOSITORY
https://github.com/Stakcery/Web-Security/issues/1
Topthink/framework Source Repository REPOSITORY
https://github.com/top-think/framework

Frequently Asked Questions

What is CVE-2021-44892?
CVE-2021-44892 is a security vulnerability in Topthink/framework involving ThinkPHP Remote Code Execution (RCE) vulnerability under General Security Weakness.
Which Topthink/framework versions are affected?
Affected versions include releases prior to current release patches across affected packages: topthink/framework.
What version fixes CVE-2021-44892?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is topthink/framework affected?
Yes, topthink/framework 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-2021-44892?
CVE-2021-44892 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-44892?
CVE-2021-44892 is classified under General Security Weakness.
How can I check Packagist dependencies for CVE-2021-44892?
Run the dependency tree command: 'inspect dependencies for topthink/framework'. 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-75jp-87w2-c6x2",
  "modified" : "2024-04-24T23:02:36Z",
  "published" : "2022-02-11T00:00:45Z",
  "aliases" : [ "CVE-2021-44892" ],
  "summary" : "ThinkPHP Remote Code Execution (RCE) vulnerability",
  "details" : "A Remote Code Execution (RCE) vulnerability exists in ThinkPHP 3.x.x via value[_filename] in index.php, which could let a malicious user obtain server control privileges.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "topthink/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.2.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-44892"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Stakcery/Web-Security/issues/1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/top-think/framework"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-24T23:02:36Z",
    "nvd_published_at" : "2022-02-10T17:15:00Z"
  }
}