csaf_certbund - wid-sec-w-2025-0886

WID-SEC-W-2025-0886

Vulnerability from csaf_certbund - Published: 2025-04-24 22:00 - Updated: 2025-06-02 22:00

Summary

ConnectWise ScreenConnect: Schwachstelle ermöglicht Codeausführung

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

ConnectWise ScreenConnect ist eine Softwarelösung für Fernzugriff, Fernsupport und Fernwartung von Computern, Servern, virtuellen Maschinen und mobilen Geräten.

Angriff

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in ConnectWise ScreenConnect ausnutzen, um beliebigen Programmcode auszuführen.

Betroffene Betriebssysteme

- Linux - Sonstiges - UNIX - Windows

JSON

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{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "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": "ConnectWise ScreenConnect ist eine Softwarel\u00f6sung f\u00fcr Fernzugriff, Fernsupport und Fernwartung von Computern, Servern, virtuellen Maschinen und mobilen Ger\u00e4ten.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in ConnectWise ScreenConnect ausnutzen, um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- 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-2025-0886 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-0886.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2025-0886 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-0886"
      },
      {
        "category": "external",
        "summary": "ScreenConnect 2025.4 Security Patch vom 2025-04-24",
        "url": "https://www.connectwise.com/company/trust/security-bulletins/screenconnect-security-patch-2025.4"
      },
      {
        "category": "external",
        "summary": "CISA Known Exploited Vulnerabilities Catalog vom 2025-06-02",
        "url": "https://www.cisa.gov/news-events/alerts/2025/06/02/cisa-adds-five-known-exploited-vulnerabilities-catalog"
      }
    ],
    "source_lang": "en-US",
    "title": "ConnectWise ScreenConnect: Schwachstelle erm\u00f6glicht Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2025-06-02T22:00:00.000+00:00",
      "generator": {
        "date": "2025-06-03T04:33:31.988+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.12"
        }
      },
      "id": "WID-SEC-W-2025-0886",
      "initial_release_date": "2025-04-24T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2025-04-24T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2025-04-27T22:00:00.000+00:00",
          "number": "2",
          "summary": "CVE erg\u00e4nzt"
        },
        {
          "date": "2025-06-02T22:00:00.000+00:00",
          "number": "3",
          "summary": "Schwachstelle wird ausgenutzt"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c25.2.4",
                "product": {
                  "name": "ConnectWise ScreenConnect \u003c25.2.4",
                  "product_id": "T043151"
                }
              },
              {
                "category": "product_version",
                "name": "25.2.4",
                "product": {
                  "name": "ConnectWise ScreenConnect 25.2.4",
                  "product_id": "T043151-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:connectwise:screenconnect:25.2.4"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "ScreenConnect"
          }
        ],
        "category": "vendor",
        "name": "ConnectWise"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-3935",
      "product_status": {
        "known_affected": [
          "T043151"
        ]
      },
      "release_date": "2025-04-24T22:00:00.000+00:00",
      "title": "CVE-2025-3935"
    }
  ]
}

CVE-2025-3935 (GCVE-0-2025-3935)

Vulnerability from cvelistv5 – Published: 2025-04-25 18:27 – Updated: 2025-10-21 22:55

Summary

ScreenConnect versions 25.2.3 and earlier versions may be susceptible to a ViewState code injection attack. ASP.NET Web Forms use ViewState to preserve page and control state, with data encoded using Base64 protected by machine keys. It is important to note that to obtain these machine keys, privileged system level access must be obtained. If these machine keys are compromised, attackers could create and send a malicious ViewState to the website, potentially leading to remote code execution on the server. The risk does not originate from a vulnerability introduced by ScreenConnect, but from platform level behavior. This had no direct impact to ScreenConnect Client. ScreenConnect 2025.4 patch disables ViewState and removes any dependency on it.

Severity ?

8.1 (High)


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

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

ConnectWise

References

URL

Tags

	https://www.connectwise.com/company/trust/securit…
	https://www.connectwise.com/company/trust/advisories

Impacted products

	Vendor	Product	Version
	ConnectWise	ScreenConnect	Affected: <25.2.3

Show details on NVD website

JSON

To clipboard

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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-2025-0886

CVE-2025-3935 (GCVE-0-2025-3935)

Tags

Sightings

Nomenclature