VDE-2021-031

Vulnerability from csaf_mbconnectlinegmbh - Published: 2021-07-22 11:33 - Updated: 2025-05-14 12:28
Summary
MB connect line: Apache Guacamole related vulnerabilities in mbCONNECT24
Notes
Summary: Two vulnerabilities in mbCONNECT24 and mymbCONNECT24 can lead to information disclosure and arbitrary code execution. Please consult the CVE entries for details.
Remediation: Update to 2.9.0
CVE-2020-9498

Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static virtual channels. If a userconnects to a malicious or compromised RDP server, a series ofspecially-crafted PDUs could result in memory corruption, possiblyallowing arbitrary code to be executed with the privileges of therunning guacd process.

6.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Product Identifier Version Remediation
mbCONNECT24 <=2.8.0
MB connect line / Software / mbCONNECT24
 <=2.8.0
Vendor Fix
mymbCONNECT24 <=2.8.0
MB connect line / Software / mymbCONNECT24
 <=2.8.0
Product Identifier Version Remediation
mbCONNECT24 2.9.0
MB connect line / Software / mbCONNECT24
 2.9.0
mymbCONNECT24 2.9.0
MB connect line / Software / mymbCONNECT24
 2.9.0
CVE-2020-9497

Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to a malicious or compromised RDP server, specially-craftedPDUs could result in disclosure of information within the memory ofthe guacd process handling the connection.

4.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
CWE-20 - Improper Input Validation
Affected products
Known affected 2 products, the same list as for CVE-2020-9498
Fixed 2 products, the same list as for CVE-2020-9498
References
Acknowledgments
CERT@VDE certvde.com
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "summary",
        "text": "Two vulnerabilities in mbCONNECT24 and mymbCONNECT24 can lead to information disclosure and arbitrary code execution.\n\nPlease consult the CVE entries for details.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "Update to 2.9.0",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "security-team@mbconnectline.de",
      "name": "MB connect line GmbH",
      "namespace": "https://mbconnectline.com"
    },
    "references": [
      {
        "category": "external",
        "summary": "MB connect line advisory overview at CERT@VDE",
        "url": "https://certvde.com/en/advisories/vendor/mbconnectline/"
      },
      {
        "category": "self",
        "summary": "VDE-2021-031: MB connect line: Apache Guacamole related vulnerabilities in mbCONNECT24 - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2021-031"
      },
      {
        "category": "self",
        "summary": "VDE-2021-031: MB connect line: Apache Guacamole related vulnerabilities in mbCONNECT24 - CSAF",
        "url": "https://mbconnectline.csaf-tp.certvde.com/.well-known/csaf/white/2021/vde-2021-031.json"
      }
    ],
    "title": "MB connect line: Apache Guacamole related vulnerabilities in mbCONNECT24",
    "tracking": {
      "aliases": [
        "VDE-2021-031"
      ],
      "current_release_date": "2025-05-14T12:28:19.000Z",
      "generator": {
        "date": "2025-01-27T09:53:05.468Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.5.17"
        }
      },
      "id": "VDE-2021-031",
      "initial_release_date": "2021-07-22T11:33:00.000Z",
      "revision_history": [
        {
          "date": "2021-07-22T11:35:00.000Z",
          "number": "1",
          "summary": "Initial revision."
        },
        {
          "date": "2025-05-14T12:28:19.000Z",
          "number": "2",
          "summary": "Fix: version space, added distribution"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "product_version_range",
                    "name": "\u003c=2.8.0",
                    "product": {
                      "name": "mbCONNECT24 \u003c=2.8.0",
                      "product_id": "CSAFPID-51001"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "2.9.0",
                    "product": {
                      "name": "mbCONNECT24 2.9.0",
                      "product_id": "CSAFPID-52001"
                    }
                  }
                ],
                "category": "product_name",
                "name": "mbCONNECT24"
              },
              {
                "branches": [
                  {
                    "category": "product_version_range",
                    "name": "\u003c=2.8.0",
                    "product": {
                      "name": "mymbCONNECT24 \u003c=2.8.0",
                      "product_id": "CSAFPID-51002"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "2.9.0",
                    "product": {
                      "name": "mymbCONNECT24 2.9.0",
                      "product_id": "CSAFPID-52002"
                    }
                  }
                ],
                "category": "product_name",
                "name": "mymbCONNECT24"
              }
            ],
            "category": "product_family",
            "name": "Software"
          }
        ],
        "category": "vendor",
        "name": "MB connect line"
      }
    ],
    "product_groups": [
      {
        "group_id": "CSAFGID-0001",
        "product_ids": [
          "CSAFPID-51001",
          "CSAFPID-51002"
        ],
        "summary": "Affected Products"
      },
      {
        "group_id": "CSAFGID-0002",
        "product_ids": [
          "CSAFPID-52001",
          "CSAFPID-52002"
        ],
        "summary": "Fixed Products"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-9498",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "notes": [
        {
          "category": "description",
          "text": "Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static virtual channels. If a userconnects to a malicious or compromised RDP server, a series ofspecially-crafted PDUs could result in memory corruption, possiblyallowing arbitrary code to be executed with the privileges of therunning guacd process.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-52001",
          "CSAFPID-52002"
        ],
        "known_affected": [
          "CSAFPID-51001",
          "CSAFPID-51002"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to 3.9R0.5",
          "product_ids": [
            "CSAFPID-51001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 6.7,
            "environmentalSeverity": "MEDIUM",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 6.7,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-51001",
            "CSAFPID-51002"
          ]
        }
      ],
      "title": "CVE-2020-9498"
    },
    {
      "cve": "CVE-2020-9497",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "description",
          "text": "Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to a malicious or compromised RDP server, specially-craftedPDUs could result in disclosure of information within the memory ofthe guacd process handling the connection.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-52001",
          "CSAFPID-52002"
        ],
        "known_affected": [
          "CSAFPID-51001",
          "CSAFPID-51002"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to 3.9R0.5",
          "product_ids": [
            "CSAFPID-51001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 4.4,
            "environmentalSeverity": "MEDIUM",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 4.4,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-51001",
            "CSAFPID-51002"
          ]
        }
      ],
      "title": "CVE-2020-9497"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.