CVE-2023-34090: Decidim Decidim Vulnerable To Sensitive Data Vulnerability

HIGH
Advisory Identifier: GHSA-jm79-9pm4-vrw9
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CVSS 7.5
CWE-200
Published
Advisory Summary

CVE-2023-34090 is a HIGH (CVSS 7.5) decidim vulnerable to sensitive data vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Decidim libraries in the RubyGems ecosystem. The issue involves decidim vulnerable to sensitive data disclosure. Remediation is available by upgrading affected packages to version 0.27.3.

CVE-2023-34090 at a Glance

CVE Identifier CVE-2023-34090
GHSA Identifier GHSA-jm79-9pm4-vrw9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Decidim
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/A:N).

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2023-34090

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

decidim fixed: 0.27.3 
Upgrade decidim to 0.27.3
decidim-meetings fixed: 0.27.3 
Upgrade decidim-meetings to 0.27.3
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 decidim

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-34090, inspect your project dependencies for Decidim:

inspect dependencies for decidim

Analyze the terminal output to locate any version of Decidim in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.27.3), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Decidim, 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

Note: added the actual report as a [comment](https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9#advisory-comment-81110). ### Summary Decidim, a platform for digital citizen participation, uses a third-party library named Ransack for filtering certain database collections (e.g., public meetings). By default, this library allows filtering on all data attributes and associations. This allows an unauthenticated remote attacker to exfiltrate non-public data from the underlying database of a Decidim instance (e.g., exfiltrating data from the user table). ### Impact This issue may lead to Sensitive Data Disclosure. ### Patches The problem was patched in [v0.27.3](https://github.com/decidim/decidim/releases/tag/v0.27.3). ### Workarounds Disable or unpublish all meetings components from your application.

CVE-2023-34090 Affected Decidim Versions

2 component(s)
Fixed Versions:
0.27.3
Product / Package Ecosystem Affected Versions Fixed Version
decidim
gem/decidim
RubyGems
≥ 0.27.0
< 0.27.3
0.27.3
decidim-meetings
gem/decidim-meetings
RubyGems
≥ 0.27.0
< 0.27.3
0.27.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9
GitHub Advisory / Wiki ADVISORY
https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9#advisory-comment-81110
NVD — CVE-2023-34090 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-34090
Decidim Source Repository REPOSITORY
https://github.com/decidim/decidim
Decidim Release RELEASE
https://github.com/decidim/decidim/releases/tag/v0.27.3
Decidim Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-meetings/CVE-2023-34090.yml
Decidim Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34090.yml

Frequently Asked Questions

What is CVE-2023-34090?
CVE-2023-34090 is a security vulnerability in Decidim involving Decidim vulnerable to sensitive data disclosure under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Decidim versions are affected?
Affected versions include releases prior to 0.27.3 across affected packages: decidim, decidim-meetings.
What version fixes CVE-2023-34090?
Upgrading to 0.27.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is decidim affected?
Yes, decidim is affected in releases prior to 0.27.3. Upgrade your dependency to 0.27.3 or later.
Is decidim-meetings affected?
Yes, decidim-meetings is affected in releases prior to 0.27.3. Upgrade your dependency to 0.27.3 or later.
What is the CVSS score of CVE-2023-34090?
CVE-2023-34090 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2023-34090?
CVE-2023-34090 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check RubyGems dependencies for CVE-2023-34090?
Run the dependency tree command: 'inspect dependencies for decidim'. 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-jm79-9pm4-vrw9",
  "modified" : "2023-07-11T22:46:51Z",
  "published" : "2023-07-11T22:46:51Z",
  "aliases" : [ "CVE-2023-34090" ],
  "summary" : "Decidim vulnerable to sensitive data disclosure",
  "details" : "Note: added the actual report as a [comment](https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9#advisory-comment-81110).\n\n### Summary\n\nDecidim, a platform for digital citizen participation, uses a third-party library named Ransack for filtering certain database collections (e.g., public meetings). By default, this library allows filtering on all data attributes and associations. This allows an unauthenticated remote attacker to exfiltrate non-public data from the underlying database of a Decidim instance (e.g., exfiltrating data from the user table).\n\n### Impact\nThis issue may lead to Sensitive Data Disclosure.\n\n### Patches\nThe problem was patched in [v0.27.3](https://github.com/decidim/decidim/releases/tag/v0.27.3).\n\n### Workarounds\nDisable or unpublish all meetings components from your application.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "decidim"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.27.0"
      }, {
        "fixed" : "0.27.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "decidim-meetings"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.27.0"
      }, {
        "fixed" : "0.27.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/decidim/decidim/security/advisories/GHSA-jm79-9pm4-vrw9#advisory-comment-81110"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-34090"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/decidim/decidim"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/decidim/decidim/releases/tag/v0.27.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-meetings/CVE-2023-34090.yml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34090.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-11T22:46:51Z",
    "nvd_published_at" : "2023-07-11T18:15:16Z"
  }
}