CVE-2020-20120: Topthink/thinkphp SQL Injection Vulnerability

CRITICAL
Advisory Identifier: GHSA-m7h5-fjjq-559f
Share
CVSS 9.8
CWE-89
Published
Advisory Summary

CVE-2020-20120 is a CRITICAL (CVSS 9.8) sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Topthink/thinkphp libraries in the Packagist ecosystem. The issue involves sql injection in topthink/thinkphp. Remediation is available in the latest vendor maintenance releases.

CVE-2020-20120 at a Glance

CVE Identifier CVE-2020-20120
GHSA Identifier GHSA-m7h5-fjjq-559f
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product Topthink/thinkphp
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-2020-20120

To remediate this vulnerability, upgrade all affected Topthink/thinkphp 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/thinkphp fixed: Latest secure release 
Upgrade topthink/thinkphp 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/thinkphp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-20120, inspect your project dependencies for Topthink/thinkphp:

inspect dependencies for topthink/thinkphp

Analyze the terminal output to locate any version of Topthink/thinkphp 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-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Topthink/thinkphp, 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

ThinkPHP v3.2.3 and below contains a SQL injection vulnerability which is triggered when the array is not passed to the "where" and "query" methods.

CVE-2020-20120 Affected Topthink/thinkphp Versions

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

References

NVD — CVE-2020-20120 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-20120
Topthink/thinkphp Source Repository REPOSITORY
https://github.com/top-think/thinkphp/issues/553
Topthink/thinkphp Source Repository REPOSITORY
https://github.com/top-think/thinkphp

Frequently Asked Questions

What is CVE-2020-20120?
CVE-2020-20120 is a security vulnerability in Topthink/thinkphp involving SQL Injection in topthink/thinkphp under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which Topthink/thinkphp versions are affected?
Affected versions include releases prior to current release patches across affected packages: topthink/thinkphp.
What version fixes CVE-2020-20120?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is topthink/thinkphp affected?
Yes, topthink/thinkphp 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-2020-20120?
CVE-2020-20120 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-2020-20120?
CVE-2020-20120 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check Packagist dependencies for CVE-2020-20120?
Run the dependency tree command: 'inspect dependencies for topthink/thinkphp'. 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-m7h5-fjjq-559f",
  "modified" : "2021-10-07T13:56:41Z",
  "published" : "2021-09-30T17:11:11Z",
  "aliases" : [ "CVE-2020-20120" ],
  "summary" : "SQL Injection in topthink/thinkphp",
  "details" : "ThinkPHP v3.2.3 and below contains a SQL injection vulnerability which is triggered when the array is not passed to the \"where\" and \"query\" methods.",
  "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" : "topthink/thinkphp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.2.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-20120"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/top-think/thinkphp/issues/553"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/top-think/thinkphp"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-09-30T16:59:44Z",
    "nvd_published_at" : "2021-09-28T23:15:00Z"
  }
}