CVE-2021-28661: Silverstripe/graphql SilverStripe GraphQL Server Permission Checker Vulnerability

MODERATE
Advisory Identifier: GHSA-r7rh-g777-g5gx
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CVSS 4.3
CWE-863
Published
Advisory Summary

CVE-2021-28661 is a MODERATE (CVSS 4.3) silverstripe graphql server permission checker vulnerability (CWE-863: Incorrect Authorization) affecting Silverstripe/graphql libraries in the Packagist ecosystem. The issue involves silverstripe graphql server permission checker not inherited by query subclass.. Remediation is available by upgrading affected packages to version 3.5.2.

CVE-2021-28661 at a Glance

CVE Identifier CVE-2021-28661
GHSA Identifier GHSA-r7rh-g777-g5gx
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Silverstripe/graphql
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:L/I:N/A:N).

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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2021-28661

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

silverstripe/graphql fixed: 3.5.2 
Upgrade silverstripe/graphql to 3.5.2
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 silverstripe/graphql

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-28661, inspect your project dependencies for Silverstripe/graphql:

inspect dependencies for silverstripe/graphql

Analyze the terminal output to locate any version of Silverstripe/graphql in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.5.2), 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Silverstripe/graphql, 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

Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.

CVE-2021-28661 Affected Silverstripe/graphql Versions

1 component(s)
Fixed Versions:
3.5.2
Product / Package Ecosystem Affected Versions Fixed Version
silverstripe/graphql
 Packagist
≥ 3.0.0
< 3.5.2
3.5.2

References

NVD — CVE-2021-28661 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28661
Silverstripe/graphql Source Repository REPOSITORY
https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed
Silverstripe/graphql Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml
Silverstripe/graphql Source Repository REPOSITORY
https://github.com/silverstripe/silverstripe-graphql
Silverstripe/graphql Source Repository REPOSITORY
https://github.com/silverstripe/silverstripe-graphql/releases
Silverstripe/graphql Release RELEASE
https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2
Silverstripe/graphql Release RELEASE
https://www.silverstripe.org/download/security-releases/CVE-2021-28661

Frequently Asked Questions

What is CVE-2021-28661?
CVE-2021-28661 is a security vulnerability in Silverstripe/graphql involving SilverStripe GraphQL Server permission checker not inherited by query subclass. under CWE-863: Incorrect Authorization.
Which Silverstripe/graphql versions are affected?
Affected versions include releases prior to 3.5.2 across affected packages: silverstripe/graphql.
What version fixes CVE-2021-28661?
Upgrading to 3.5.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is silverstripe/graphql affected?
Yes, silverstripe/graphql is affected in releases prior to 3.5.2. Upgrade your dependency to 3.5.2 or later.
What is the CVSS score of CVE-2021-28661?
CVE-2021-28661 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2021-28661?
CVE-2021-28661 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Packagist dependencies for CVE-2021-28661?
Run the dependency tree command: 'inspect dependencies for silverstripe/graphql'. 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-r7rh-g777-g5gx",
  "modified" : "2021-10-18T14:34:41Z",
  "published" : "2021-10-12T18:49:23Z",
  "aliases" : [ "CVE-2021-28661" ],
  "summary" : "SilverStripe GraphQL Server permission checker not inherited by query subclass.",
  "details" : "Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "silverstripe/graphql"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.5.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-28661"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/silverstripe/silverstripe-graphql/pull/407/commits/16961459f681f7b32145296189dfdbcc7715e6ed"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2021-28661.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/silverstripe/silverstripe-graphql"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/silverstripe/silverstripe-graphql/releases"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/silverstripe/silverstripe-graphql/releases/tag/3.5.2"
  }, {
    "type" : "WEB",
    "url" : "https://www.silverstripe.org/download/security-releases/CVE-2021-28661"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-10-08T21:35:47Z",
    "nvd_published_at" : "2021-10-07T15:15:00Z"
  }
}