Vulnerability-Lookup

ubuntu-cve-2021-41767

Vulnerability from osv_ubuntu

Published

2022-01-11 22:15

Modified

2026-04-22 07:40

Summary

Details

Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-41767	REPORT
	https://lists.apache.org/thread/5l31k4jmzdsfz0xt8…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-41767	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "guacd",
            "binary_version": "0.8.3-2"
          },
          {
            "binary_name": "libguac-client-rdp0",
            "binary_version": "0.8.3-2"
          },
          {
            "binary_name": "libguac-client-ssh0",
            "binary_version": "0.8.3-2"
          },
          {
            "binary_name": "libguac-client-vnc0",
            "binary_version": "0.8.3-2"
          },
          {
            "binary_name": "libguac5",
            "binary_version": "0.8.3-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "guacamole-server",
        "purl": "pkg:deb/ubuntu/guacamole-server@0.8.3-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8.3-1build2",
        "0.8.3-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "guacd",
            "binary_version": "0.9.9-2build1"
          },
          {
            "binary_name": "libguac-client-rdp0",
            "binary_version": "0.9.9-2build1"
          },
          {
            "binary_name": "libguac-client-ssh0",
            "binary_version": "0.9.9-2build1"
          },
          {
            "binary_name": "libguac-client-telnet0",
            "binary_version": "0.9.9-2build1"
          },
          {
            "binary_name": "libguac-client-vnc0",
            "binary_version": "0.9.9-2build1"
          },
          {
            "binary_name": "libguac11",
            "binary_version": "0.9.9-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "guacamole-server",
        "purl": "pkg:deb/ubuntu/guacamole-server@0.9.9-2build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.9-2",
        "0.9.9-2build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "guacd",
            "binary_version": "1.3.0-1.1"
          },
          {
            "binary_name": "libguac-client-rdp0",
            "binary_version": "1.3.0-1.1"
          },
          {
            "binary_name": "libguac-client-ssh0",
            "binary_version": "1.3.0-1.1"
          },
          {
            "binary_name": "libguac-client-telnet0",
            "binary_version": "1.3.0-1.1"
          },
          {
            "binary_name": "libguac-client-vnc0",
            "binary_version": "1.3.0-1.1"
          },
          {
            "binary_name": "libguac19",
            "binary_version": "1.3.0-1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "guacamole-server",
        "purl": "pkg:deb/ubuntu/guacamole-server@1.3.0-1.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.0-1",
        "1.3.0-1build1",
        "1.3.0-1.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "guacd",
            "binary_version": "1.3.0-1.3ubuntu1"
          },
          {
            "binary_name": "libguac-client-rdp0t64",
            "binary_version": "1.3.0-1.3ubuntu1"
          },
          {
            "binary_name": "libguac-client-ssh0t64",
            "binary_version": "1.3.0-1.3ubuntu1"
          },
          {
            "binary_name": "libguac-client-telnet0t64",
            "binary_version": "1.3.0-1.3ubuntu1"
          },
          {
            "binary_name": "libguac-client-vnc0t64",
            "binary_version": "1.3.0-1.3ubuntu1"
          },
          {
            "binary_name": "libguac19t64",
            "binary_version": "1.3.0-1.3ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "guacamole-server",
        "purl": "pkg:deb/ubuntu/guacamole-server@1.3.0-1.3ubuntu1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.0-1.1",
        "1.3.0-1.3ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user\u0027s active use of that same connection.",
  "id": "UBUNTU-CVE-2021-41767",
  "modified": "2026-04-22T07:40:10Z",
  "published": "2022-01-11T22:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-41767"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-41767"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-41767"
  ]
}

CVE-2021-41767 (GCVE-0-2021-41767)

Vulnerability from cvelistv5 – Published: 2022-01-11 22:10 – Updated: 2024-08-04 03:15

Title

Private tunnel identifier may be included in the non-private details of active connections

Summary

Severity

No CVSS data available.

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

apache

References

2 references

URL	Tags
https://lists.apache.org/thread/5l31k4jmzdsfz0xt8…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2022/01/11/6	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Guacamole	Affected: unspecified , ≤ 1.3.0 (custom)

Credits

We would like to thank Damian Velardo (Australia and New Zealand Banking Group) for reporting this issue.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T03:15:29.360Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
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              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro"
          },
          {
            "name": "[oss-security] 20220111 [SECURITY] CVE-2021-41767: Apache Guacamole: Private tunnel identifier may be included in the non-private details of active connections",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/01/11/6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apache Guacamole",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "1.3.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "We would like to thank Damian Velardo (Australia and New Zealand Banking Group) for reporting this issue."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user\u0027s active use of that same connection."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "other": "moderate"
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-01-12T00:06:13.000Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
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      "references": [
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          "url": "https://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro"
        },
        {
          "name": "[oss-security] 20220111 [SECURITY] CVE-2021-41767: Apache Guacamole: Private tunnel identifier may be included in the non-private details of active connections",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/01/11/6"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Private tunnel identifier may be included in the non-private details of active connections",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
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          "ASSIGNER": "security@apache.org",
          "ID": "CVE-2021-41767",
          "STATE": "PUBLIC",
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              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Apache Guacamole",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "1.3.0"
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                },
                "vendor_name": "Apache Software Foundation"
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            "value": "We would like to thank Damian Velardo (Australia and New Zealand Banking Group) for reporting this issue."
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}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

ubuntu-cve-2021-41767

Vulnerability from osv_ubuntu

CVE-2021-41767 (GCVE-0-2021-41767)

Tags

Sightings

Nomenclature