csaf_certbund - wid-sec-w-2025-0578

WID-SEC-W-2025-0578

Vulnerability from csaf_certbund - Published: 2025-03-17 23:00 - Updated: 2025-04-16 22:00

Summary

Mattermost Plugins: Schwachstelle ermöglicht Offenlegung von Daten

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

Mattermost ist ein webbasierter Instant-Messaging-Dienst.

Angriff

Ein Angreifer kann eine Schwachstelle in Mattermost ausnutzen, um Informationen offenzulegen

Betroffene Betriebssysteme

- Sonstiges - UNIX - Windows

JSON

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{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Mattermost ist ein webbasierter Instant-Messaging-Dienst.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann eine Schwachstelle in Mattermost ausnutzen, um Informationen offenzulegen",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2025-0578 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-0578.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2025-0578 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-0578"
      },
      {
        "category": "external",
        "summary": "Mattermost Security Updates vom 2025-03-17",
        "url": "https://mattermost.com/security-updates/#plugins"
      }
    ],
    "source_lang": "en-US",
    "title": "Mattermost Plugins: Schwachstelle erm\u00f6glicht Offenlegung von Daten",
    "tracking": {
      "current_release_date": "2025-04-16T22:00:00.000+00:00",
      "generator": {
        "date": "2025-04-17T08:05:57.954+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.12"
        }
      },
      "id": "WID-SEC-W-2025-0578",
      "initial_release_date": "2025-03-17T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2025-03-17T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2025-03-18T23:00:00.000+00:00",
          "number": "2",
          "summary": "Anpassung"
        },
        {
          "date": "2025-04-16T22:00:00.000+00:00",
          "number": "3",
          "summary": "CVE und Beschreibung erg\u00e4nzt"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c10.5.2",
                "product": {
                  "name": "Mattermost Mattermost \u003c10.5.2",
                  "product_id": "T041936"
                }
              },
              {
                "category": "product_version",
                "name": "10.5.2",
                "product": {
                  "name": "Mattermost Mattermost 10.5.2",
                  "product_id": "T041936-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mattermost:mattermost_server:server__10.5.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Plugin MSTeams \u003c2.1.0",
                "product": {
                  "name": "Mattermost Mattermost Plugin MSTeams \u003c2.1.0",
                  "product_id": "T042953"
                }
              },
              {
                "category": "product_version",
                "name": "Plugin MSTeams 2.1.0",
                "product": {
                  "name": "Mattermost Mattermost Plugin MSTeams 2.1.0",
                  "product_id": "T042953-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mattermost:mattermost_server:plugin_msteams__2.1.0"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Mattermost"
          }
        ],
        "category": "vendor",
        "name": "Mattermost"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-27936",
      "product_status": {
        "known_affected": [
          "T041936",
          "T042953"
        ]
      },
      "release_date": "2025-03-17T23:00:00.000+00:00",
      "title": "CVE-2025-27936"
    }
  ]
}

CVE-2025-27936 (GCVE-0-2025-27936)

Vulnerability from cvelistv5 – Published: 2025-04-16 09:14 – Updated: 2025-04-16 14:32

Summary

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

Mattermost

References

URL

Tags

https://mattermost.com/security-updates

Impacted products

	Vendor	Product	Version
	Mattermost	Mattermost	Affected: 10.5.0 , ≤ 10.5.1 (semver) Unaffected: 10.6.0 Unaffected: 10.5.2

Credits

Juho Forsén

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-27936",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-16T14:19:16.252929Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-16T14:32:45.176Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mattermost",
          "vendor": "Mattermost",
          "versions": [
            {
              "lessThanOrEqual": "10.5.1",
              "status": "affected",
              "version": "10.5.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "10.6.0"
            },
            {
              "status": "unaffected",
              "version": "10.5.2"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Juho Fors\u00e9n"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMattermost Plugin MSTeams versions \u0026lt;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e2.1.0 and Mattermost Server\u0026nbsp;\u003c/span\u003eversions 10.5.x \u0026lt;=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows\u0026nbsp;an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison. \u003c/p\u003e"
            }
          ],
          "value": "Mattermost Plugin MSTeams versions \u003c2.1.0 and Mattermost Server\u00a0versions 10.5.x \u003c=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows\u00a0an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-208",
              "description": "CWE-208: Observable Timing Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-04-16T09:14:55.095Z",
        "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "shortName": "Mattermost"
      },
      "references": [
        {
          "url": "https://mattermost.com/security-updates"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpdate Mattermost Plugin MSTeams to version 2.1.1 or Mattermost Server to versions 10.6.0, 10.5.2 or higher.\u003c/p\u003e"
            }
          ],
          "value": "Update Mattermost Plugin MSTeams to version 2.1.1 or Mattermost Server to versions 10.6.0, 10.5.2 or higher."
        }
      ],
      "source": {
        "advisory": "MMSA-2025-00450",
        "defect": [
          "https://mattermost.atlassian.net/browse/MM-63147"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Webhook Secret Exposure via Timing attack in MSteams plugin",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
    "assignerShortName": "Mattermost",
    "cveId": "CVE-2025-27936",
    "datePublished": "2025-04-16T09:14:55.095Z",
    "dateReserved": "2025-04-08T11:14:14.689Z",
    "dateUpdated": "2025-04-16T14:32:45.176Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2025-0578

CVE-2025-27936 (GCVE-0-2025-27936)

Tags

Sightings

Nomenclature