VDE-2025-066

Vulnerability from csaf_smasolartechnologyag - Published: 2025-08-27 08:00 - Updated: 2025-08-27 08:00
Summary
SMA: Directory Traversal in Sunny Boy
Notes
Summary: A security researcher discovered a Directory Traversal vulnerability in Sunny Boy 3, which allows remote attackers to access sensitive information. The vulnerability is already fixed since January 2021 with version 3.10.27.R.
Impact: An authenticated user can access files and directories outside the intended web root.
Remediation: Update Firmware to at least version 3.10.27.R.
CVE-2021-4459

An authorized remote attacker can access files and directories outside the intended web root, potentially exposing sensitive system information of the affected Sunny Boy devices.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE-23 - Relative Path Traversal
Vendor Fix Update Firmware to version 3.10.27.R or newer.
References
Acknowledgments
CERT@VDE certvde.com
KOIN Network Ahmed Alroky
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "names": [
          "Ahmed Alroky"
        ],
        "organization": " KOIN Network",
        "summary": "reporting"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "A security researcher discovered a Directory Traversal vulnerability in Sunny Boy 3, which allows remote attackers to access sensitive information. \nThe vulnerability is already fixed since January 2021 with version 3.10.27.R. ",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "An authenticated user can access files and directories outside the intended web root.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "Update Firmware to at least version 3.10.27.R.",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "information-security@sma.de",
      "name": "SMA Solar Technology AG",
      "namespace": "https://sma.de"
    },
    "references": [
      {
        "category": "external",
        "summary": "SMA PSIRT",
        "url": "https://www.sma.de/cybersicherheit/produktsicherheit"
      },
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for SMA",
        "url": "https://certvde.com/en/advisories/vendor/sma/"
      },
      {
        "category": "self",
        "summary": "VDE-2025-066: SMA: Directory Traversal in Sunny Boy - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2025-066"
      },
      {
        "category": "self",
        "summary": "VDE-2025-066: SMA: Directory Traversal in Sunny Boy - CSAF",
        "url": "https://sma.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-066.json"
      }
    ],
    "title": "SMA: Directory Traversal in Sunny Boy",
    "tracking": {
      "aliases": [
        "VDE-2025-066"
      ],
      "current_release_date": "2025-08-27T08:00:00.000Z",
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      "revision_history": [
        {
          "date": "2025-08-27T08:00:00.000Z",
          "number": "1.0.0",
          "summary": "Initial revision."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "product_name",
                    "name": "Sunny Boy 3.0",
                    "product": {
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                      "product_id": "CSAFPID-11001",
                      "product_identification_helper": {
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                    "product": {
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                  },
                  {
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                    "product": {
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                      "product_identification_helper": {
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                  },
                  {
                    "category": "product_name",
                    "name": "Sunny Boy 5.0",
                    "product": {
                      "name": "Sunny Boy 5.0",
                      "product_id": "CSAFPID-11004",
                      "product_identification_helper": {
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                      }
                    }
                  },
                  {
                    "category": "product_name",
                    "name": "Sunny Boy 6.0",
                    "product": {
                      "name": "Sunny Boy 6.0",
                      "product_id": "CSAFPID-11005",
                      "product_identification_helper": {
                        "model_numbers": [
                          "SB6.0-1AV-41"
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                      }
                    }
                  }
                ],
                "category": "product_family",
                "name": "Sony Boy"
              }
            ],
            "category": "product_family",
            "name": "Hardware"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c3.10.27.R",
                "product": {
                  "name": "Firmware \u003c3.10.27.R",
                  "product_id": "CSAFPID-21001"
                }
              },
              {
                "category": "product_version",
                "name": "3.10.27.R",
                "product": {
                  "name": "Firmware 3.10.27.R",
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            ],
            "category": "product_family",
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        "category": "vendor",
        "name": "SMA Solar Technology AG"
      }
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    "product_groups": [
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        "group_id": "CSAFGID-0001",
        "product_ids": [
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          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004",
          "CSAFPID-31005"
        ],
        "summary": "Affected products."
      },
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        "group_id": "CSAFGID-0002",
        "product_ids": [
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          "CSAFPID-32002",
          "CSAFPID-32003",
          "CSAFPID-32004",
          "CSAFPID-32005"
        ],
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      }
    ],
    "relationships": [
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        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware \u003c3.10.27.R installed on Sunny Boy 3.0",
          "product_id": "CSAFPID-31001"
        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
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          "product_id": "CSAFPID-31002"
        },
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        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
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      },
      {
        "category": "installed_on",
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      },
      {
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      },
      {
        "category": "installed_on",
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        },
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        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 3.10.27.R installed on Sunny Boy 3.6",
          "product_id": "CSAFPID-32002"
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        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
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        },
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        "relates_to_product_reference": "CSAFPID-11003"
      },
      {
        "category": "installed_on",
        "full_product_name": {
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          "product_id": "CSAFPID-32004"
        },
        "product_reference": "CSAFPID-22001",
        "relates_to_product_reference": "CSAFPID-11004"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 3.10.27.R installed on Sunny Boy 6.0",
          "product_id": "CSAFPID-32005"
        },
        "product_reference": "CSAFPID-22001",
        "relates_to_product_reference": "CSAFPID-11005"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-4459",
      "cwe": {
        "id": "CWE-23",
        "name": "Relative Path Traversal"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "An authorized remote attacker can access files and directories outside the intended web root, potentially exposing sensitive system information of the affected Sunny Boy devices. ",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "fixed": [
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          "CSAFPID-32002",
          "CSAFPID-32003",
          "CSAFPID-32004",
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          "category": "vendor_fix",
          "details": "Update Firmware to version 3.10.27.R or newer.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 6.5,
            "environmentalSeverity": "MEDIUM",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 6.5,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001",
            "CSAFPID-31002",
            "CSAFPID-31003",
            "CSAFPID-31004",
            "CSAFPID-31005"
          ]
        }
      ],
      "title": "CVE-2021-4459"
    }
  ]
}


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