Vulnerability-Lookup

GHSA-HCWQ-WCMG-W44R

Vulnerability from github – Published: 2025-07-03 12:34 – Updated: 2025-07-03 12:34

Details

The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.

Severity

6.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-27458"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-327"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-03T12:15:23Z",
    "severity": "MODERATE"
  },
  "details": "The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.",
  "id": "GHSA-hcwq-wcmg-w44r",
  "modified": "2025-07-03T12:34:58Z",
  "published": "2025-07-03T12:34:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27458"
    },
    {
      "type": "WEB",
      "url": "https://sick.com/psirt"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
    },
    {
      "type": "WEB",
      "url": "https://www.endress.com"
    },
    {
      "type": "WEB",
      "url": "https://www.first.org/cvss/calculator/3.1"
    },
    {
      "type": "WEB",
      "url": "https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json"
    },
    {
      "type": "WEB",
      "url": "https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-27458 (GCVE-0-2025-27458)

Vulnerability from cvelistv5 – Published: 2025-07-03 11:33 – Updated: 2025-07-03 13:15

Title

CVE-2025-27458

Summary

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-03 12:59 UTC

CWE

CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Assigner

SICK AG Scorecard

References

6 references

URL	Tags
https://www.endress.com	x_Endress+Hauser
https://sick.com/psirt	x_SICK PSIRT Security Advisories
https://www.cisa.gov/resources-tools/resources/ic…	x_ICS-CERT recommended practices on Industrial Security
https://www.first.org/cvss/calculator/3.1	x_CVSS v3.1 Calculator
https://www.sick.com/.well-known/csaf/white/2025/…	x_The canonical URL.
https://www.sick.com/.well-known/csaf/white/2025/…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Endress+Hauser	Endress+Hauser MEAC300-FNADE4	Affected: vers:all/* (custom)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-27458",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-03T12:59:45.758774Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-03T13:15:43.013Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "Endress+Hauser MEAC300-FNADE4",
          "vendor": "Endress+Hauser",
          "versions": [
            {
              "status": "affected",
              "version": "vers:all/*",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
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          "supportingMedia": [
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              "base64": false,
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              "value": "\u003cp\u003eThe VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information. \u003c/p\u003e"
            }
          ],
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 6.5,
            "environmentalSeverity": "MEDIUM",
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          "tags": [
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          ],
          "url": "https://sick.com/psirt"
        },
        {
          "tags": [
            "x_ICS-CERT recommended practices on Industrial Security"
          ],
          "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
        },
        {
          "tags": [
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          "url": "https://www.first.org/cvss/calculator/3.1"
        },
        {
          "tags": [
            "x_The canonical URL."
          ],
          "url": "https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json"
        },
        {
          "tags": [
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          ],
          "url": "https://sick.com/psirt"
        },
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          "tags": [
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    "dateReserved": "2025-02-26T08:40:02.358Z",
    "dateUpdated": "2025-07-03T13:15:43.013Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-HCWQ-WCMG-W44R

CVE-2025-27458 (GCVE-0-2025-27458)

Tags

Sightings

Nomenclature

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