Vulnerability-Lookup

USN-4649-2

Vulnerability from osv_ubuntu – Published: 2021-01-12 12:44 – Updated: 2026-02-10 04:41 – Source website

Summary

xdg-utils regression

Details

USN-4649-1 fixed vulnerabilities in xdg-utils. That update caused a regression by removing the --attach functionality in thunderbird and others applications. This update fix the problem by reverting these changes.

Original advisory details:

Jens Mueller discovered that xdg-utils incorrectly handled certain URI. An attacker could possibly use this issue to expose sensitive information.

References

URL

Type

	https://ubuntu.com/security/notices/USN-4649-2	ADVISORY
	https://launchpad.net/bugs/1909941	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.1-1ubuntu1.16.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.1-1ubuntu1.16.04.5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.1-1ubuntu1.16.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.0~rc3+git20150907-1ubuntu2",
        "1.1.0~rc3+git20150907-1ubuntu3",
        "1.1.1-1ubuntu1",
        "1.1.1-1ubuntu1.16.04.1",
        "1.1.1-1ubuntu1.16.04.3",
        "1.1.1-1ubuntu1.16.04.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.2-1ubuntu2.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.2-1ubuntu2.5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.2-1ubuntu2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.1-1ubuntu2",
        "1.1.1-1ubuntu3",
        "1.1.2-1ubuntu1",
        "1.1.2-1ubuntu2",
        "1.1.2-1ubuntu2.2",
        "1.1.2-1ubuntu2.3",
        "1.1.2-1ubuntu2.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.3-2ubuntu1.20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.3-2ubuntu1.20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.3-2ubuntu1.20.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.3-1ubuntu2",
        "1.1.3-2ubuntu1",
        "1.1.3-2ubuntu1.20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-4649-1 fixed vulnerabilities in xdg-utils. That update caused a regression\nby removing the --attach functionality in thunderbird and others applications.\nThis update fix the problem by reverting these changes.\n\nOriginal advisory details:\n\n Jens Mueller discovered that xdg-utils incorrectly handled certain URI.\n An attacker could possibly use this issue to expose sensitive information.\n",
  "id": "USN-4649-2",
  "modified": "2026-02-10T04:41:59Z",
  "published": "2021-01-12T12:44:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4649-2"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/1909941"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "xdg-utils regression",
  "upstream": []
}

UBUNTU-CVE-2020-27748 (CVE-2020-27748)

Vulnerability from osv_ubuntu – Published: 2020-11-24 00:00 – Updated: 2025-10-24 04:48 – Source website

Details

A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2020-27748	REPORT
	https://ubuntu.com/security/notices/USN-4649-1	ADVISORY
	https://ubuntu.com/security/notices/USN-4649-2	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2020-27748	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.1-1ubuntu1.16.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.1-1ubuntu1.16.04.5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.0~rc3+git20150907-1ubuntu2",
        "1.1.0~rc3+git20150907-1ubuntu3",
        "1.1.1-1ubuntu1",
        "1.1.1-1ubuntu1.16.04.1",
        "1.1.1-1ubuntu1.16.04.3",
        "1.1.1-1ubuntu1.16.04.4",
        "1.1.1-1ubuntu1.16.04.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.2-1ubuntu2.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.2-1ubuntu2.5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.1-1ubuntu2",
        "1.1.1-1ubuntu3",
        "1.1.2-1ubuntu1",
        "1.1.2-1ubuntu2",
        "1.1.2-1ubuntu2.2",
        "1.1.2-1ubuntu2.3",
        "1.1.2-1ubuntu2.4",
        "1.1.2-1ubuntu2.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xdg-utils",
            "binary_version": "1.1.3-2ubuntu1.20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "xdg-utils",
        "purl": "pkg:deb/ubuntu/xdg-utils@1.1.3-2ubuntu1.20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.3-1ubuntu2",
        "1.1.3-2ubuntu1",
        "1.1.3-2ubuntu1.20.04.1",
        "1.1.3-2ubuntu1.20.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the URI when being passed to Thunderbird. An attacker could potentially send a victim a URI that automatically attaches a sensitive file to a new email. If a victim user does not notice that an attachment was added and sends the email, this could result in sensitive information disclosure. It has been confirmed that the code behind this issue is in xdg-email and not in Thunderbird.",
  "id": "UBUNTU-CVE-2020-27748",
  "modified": "2025-10-24T04:48:51Z",
  "published": "2020-11-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27748"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4649-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4649-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-27748"
    }
  ],
  "related": [
    "USN-4649-1",
    "USN-4649-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-27748"
  ]
}

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.

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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.
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