CVE-2021-36564: Topthink/framework Deserialization Of Untrusted Data Vulnerability

CRITICAL
Advisory Identifier: GHSA-33gc-6cw9-w3g4
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CVSS 9.8
CWE-502
Published
Advisory Summary

CVE-2021-36564 is a CRITICAL (CVSS 9.8) deserialization of untrusted data vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Topthink/framework libraries in the Packagist ecosystem. The issue involves deserialization of untrusted data in topthink/framework. Remediation is available by upgrading affected packages to version 6.0.9.

CVE-2021-36564 at a Glance

CVE Identifier CVE-2021-36564
GHSA Identifier GHSA-33gc-6cw9-w3g4
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Topthink/framework
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-2021-36564

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: 6.0.9 
Upgrade topthink/framework to 6.0.9
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-2021-36564, 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 6.0.9), 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-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. 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

ThinkPHP v6.0.8 was discovered to contain a deserialization vulnerability via the component vendor\league\flysystem-cached-adapter\src\Storage\Adapter.php.

CVE-2021-36564 Affected Topthink/framework Versions

1 component(s)
Fixed Versions:
6.0.9
Product / Package Ecosystem Affected Versions Fixed Version
topthink/framework
 Packagist
< 6.0.9
6.0.9

References

NVD — CVE-2021-36564 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-36564
Topthink/framework Source Repository REPOSITORY
https://github.com/top-think/framework/issues/2559

Frequently Asked Questions

What is CVE-2021-36564?
CVE-2021-36564 is a security vulnerability in Topthink/framework involving Deserialization of Untrusted Data in topthink/framework under CWE-502: Deserialization of Untrusted Data.
Which Topthink/framework versions are affected?
Affected versions include releases prior to 6.0.9 across affected packages: topthink/framework.
What version fixes CVE-2021-36564?
Upgrading to 6.0.9 (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 6.0.9. Upgrade your dependency to 6.0.9 or later.
What is the CVSS score of CVE-2021-36564?
CVE-2021-36564 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-2021-36564?
CVE-2021-36564 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Packagist dependencies for CVE-2021-36564?
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-33gc-6cw9-w3g4",
  "modified" : "2023-09-19T10:02:42Z",
  "published" : "2021-12-10T20:23:19Z",
  "aliases" : [ "CVE-2021-36564" ],
  "summary" : "Deserialization of Untrusted Data in topthink/framework",
  "details" : "ThinkPHP v6.0.8 was discovered to contain a deserialization vulnerability via the component vendor\\league\\flysystem-cached-adapter\\src\\Storage\\Adapter.php.",
  "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/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.0.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-36564"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/top-think/framework/issues/2559"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-12-08T20:30:33Z",
    "nvd_published_at" : "2021-12-06T21:15:00Z"
  }
}