CVE-2024-4195: Github.com/mattermost/mattermost server Mattermost Allows Team Admins To Vulnerability

LOW
Advisory Identifier: GHSA-5fh7-7mw7-mmx5
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CVSS 2.7
CWE-284
Published
Advisory Summary

CVE-2024-4195 is a LOW (CVSS 2.7) mattermost allows team admins to vulnerability (CWE-284: Improper Access Control) affecting Github.com/mattermost/mattermost server libraries in the Go ecosystem. The issue involves mattermost allows team admins to promote guests to team admins. Remediation is available by upgrading affected packages to version 9.5.3, 8.1.12.

CVE-2024-4195 at a Glance

CVE Identifier CVE-2024-4195
GHSA Identifier GHSA-5fh7-7mw7-mmx5
Severity LOW
CVSS v3.1 Base Score 2.7
CWE Classification CWE-284: Improper Access Control
Affected Product Github.com/mattermost/mattermost server
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 2.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N).

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

How to Fix CVE-2024-4195

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

github.com/mattermost/mattermost-server fixed: 9.5.3 
Upgrade github.com/mattermost/mattermost-server to 9.5.3
github.com/mattermost/mattermost-server fixed: 8.1.12 
Upgrade github.com/mattermost/mattermost-server to 8.1.12
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 github.com/mattermost/mattermost-server

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-4195, inspect your project dependencies for Github.com/mattermost/mattermost server:

inspect dependencies for github.com/mattermost/mattermost-server

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.3), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/mattermost/mattermost server, 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

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests.

CVE-2024-4195 Affected Github.com/mattermost/mattermost server Versions

2 component(s)
Fixed Versions:
9.5.38.1.12
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost-server
golang/github.com/mattermost/mattermost-server
Go
≥ 9.5.0
< 9.5.3
9.5.3
github.com/mattermost/mattermost-server
golang/github.com/mattermost/mattermost-server
Go
≥ 8.1.0
< 8.1.12
8.1.12

References

NVD — CVE-2024-4195 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-4195
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/1e3497e0595bb4f9908c94dd9d4685d48556b7e8
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/f0872dd4e4ba34f061aa6982a71c7c29532aac2e
Github.com/mattermost/mattermost server Source Repository REPOSITORY
https://github.com/mattermost/mattermost
Github.com/mattermost/mattermost server Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2024-4195?
CVE-2024-4195 is a security vulnerability in Github.com/mattermost/mattermost server involving Mattermost allows team admins to promote guests to team admins under CWE-284: Improper Access Control.
Which Github.com/mattermost/mattermost server versions are affected?
Affected versions include releases prior to 9.5.3, 8.1.12 across affected packages: github.com/mattermost/mattermost-server.
What version fixes CVE-2024-4195?
Upgrading to 9.5.3, 8.1.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost-server affected?
Yes, github.com/mattermost/mattermost-server is affected in releases prior to 9.5.3, 8.1.12. Upgrade your dependency to 9.5.3, 8.1.12 or later.
What is the CVSS score of CVE-2024-4195?
CVE-2024-4195 has a CVSS v3.1 base score of 2.7 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2024-4195?
CVE-2024-4195 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Go dependencies for CVE-2024-4195?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost-server'. 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-5fh7-7mw7-mmx5",
  "modified" : "2024-04-26T19:06:43Z",
  "published" : "2024-04-26T09:30:35Z",
  "aliases" : [ "CVE-2024-4195" ],
  "summary" : "Mattermost allows team admins to promote guests to team admins",
  "details" : "Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.5.0"
      }, {
        "fixed" : "9.5.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.5.2"
    }
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.1.0"
      }, {
        "fixed" : "8.1.12"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.1.11"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-4195"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/1e3497e0595bb4f9908c94dd9d4685d48556b7e8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/f0872dd4e4ba34f061aa6982a71c7c29532aac2e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mattermost/mattermost"
  }, {
    "type" : "WEB",
    "url" : "https://mattermost.com/security-updates"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-26T19:06:43Z",
    "nvd_published_at" : "2024-04-26T09:15:12Z"
  }
}