CVE-2021-22958: Concrete5/concrete5 Server-Side Request Forgery Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-284f-f2hw-j2gx
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CVSS 8.2
CWE-918
Published
Advisory Summary

CVE-2021-22958 is a HIGH (CVSS 8.2) server-side request forgery vulnerability vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Concrete5/concrete5 libraries in the Packagist ecosystem. The issue involves server-side request forgery vulnerability in concrete5. Remediation is available by upgrading affected packages to version 8.5.5.

CVE-2021-22958 at a Glance

CVE Identifier CVE-2021-22958
GHSA Identifier GHSA-284f-f2hw-j2gx
Severity HIGH
CVSS v3.1 Base Score 8.2
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Concrete5/concrete5
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.2

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:R/S:C/C:H/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-22958

To remediate this vulnerability, upgrade all affected Concrete5/concrete5 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

concrete5/concrete5 fixed: 8.5.5 
Upgrade concrete5/concrete5 to 8.5.5
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 concrete5/concrete5

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-22958, inspect your project dependencies for Concrete5/concrete5:

inspect dependencies for concrete5/concrete5

Analyze the terminal output to locate any version of Concrete5/concrete5 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.5.5), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Concrete5/concrete5, 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 Server-Side Request Forgery vulnerability was found in concrete5 < 8.5.5 that allowed a decimal notation encoded IP address to bypass the limitations in place for localhost allowing interaction with local services. Impact can vary depending on services exposed.

CVE-2021-22958 Affected Concrete5/concrete5 Versions

1 component(s)
Fixed Versions:
8.5.5
Product / Package Ecosystem Affected Versions Fixed Version
concrete5/concrete5
 Packagist
< 8.5.5
8.5.5

References

NVD — CVE-2021-22958 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22958
Concrete5/concrete5 Source Repository REPOSITORY
https://github.com/concrete5/concrete5/pull/8826
hackerone.com/reports/863221 WEB
https://hackerone.com/reports/863221
documentation.concretecms.org/developers/introduc... WEB
https://documentation.concretecms.org/developers/introduction/version-history/855-release-notes
Concrete5/concrete5 Source Repository REPOSITORY
https://github.com/concrete5/concrete5

Frequently Asked Questions

What is CVE-2021-22958?
CVE-2021-22958 is a security vulnerability in Concrete5/concrete5 involving Server-Side Request Forgery vulnerability in concrete5 under CWE-918: Server-Side Request Forgery (SSRF).
Which Concrete5/concrete5 versions are affected?
Affected versions include releases prior to 8.5.5 across affected packages: concrete5/concrete5.
What version fixes CVE-2021-22958?
Upgrading to 8.5.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is concrete5/concrete5 affected?
Yes, concrete5/concrete5 is affected in releases prior to 8.5.5. Upgrade your dependency to 8.5.5 or later.
What is the CVSS score of CVE-2021-22958?
CVE-2021-22958 has a CVSS v3.1 base score of 8.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
What CWE is associated with CVE-2021-22958?
CVE-2021-22958 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Packagist dependencies for CVE-2021-22958?
Run the dependency tree command: 'inspect dependencies for concrete5/concrete5'. 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-284f-f2hw-j2gx",
  "modified" : "2021-10-18T18:15:50Z",
  "published" : "2021-10-12T18:41:59Z",
  "aliases" : [ "CVE-2021-22958" ],
  "summary" : "Server-Side Request Forgery vulnerability in concrete5",
  "details" : "A Server-Side Request Forgery vulnerability was found in concrete5 < 8.5.5 that allowed a decimal notation encoded IP address to bypass the limitations in place for localhost allowing interaction with local services. Impact can vary depending on services exposed.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "concrete5/concrete5"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.5.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-22958"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/concrete5/concrete5/pull/8826"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/863221"
  }, {
    "type" : "WEB",
    "url" : "https://documentation.concretecms.org/developers/introduction/version-history/855-release-notes"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/concrete5/concrete5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-10-08T21:44:32Z",
    "nvd_published_at" : "2021-10-07T14:15:00Z"
  }
}