ubuntu-cve-2021-38373
Vulnerability from osv_ubuntu
Published
2021-08-10 15:15
Modified
2026-04-22 07:40
Summary
Details

In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless "Server requires authentication" is checked.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "kde-config-mailtransport",
            "binary_version": "17.12.3-0ubuntu4"
          },
          {
            "binary_name": "kmailtransport-akonadi",
            "binary_version": "17.12.3-0ubuntu4"
          },
          {
            "binary_name": "libkf5mailtransport-data",
            "binary_version": "17.12.3-0ubuntu4"
          },
          {
            "binary_name": "libkf5mailtransport5abi2",
            "binary_version": "17.12.3-0ubuntu4"
          },
          {
            "binary_name": "libkf5mailtransportakonadi5",
            "binary_version": "17.12.3-0ubuntu4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "kmailtransport",
        "purl": "pkg:deb/ubuntu/kmailtransport@17.12.3-0ubuntu4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.04.3-0ubuntu1",
        "17.08.3-0ubuntu2",
        "17.08.3-0ubuntu3",
        "17.12.2-0ubuntu1",
        "17.12.3-0ubuntu3",
        "17.12.3-0ubuntu4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libkpimsmtp5",
            "binary_version": "17.12.2-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "ksmtp",
        "purl": "pkg:deb/ubuntu/ksmtp@17.12.2-0ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.12.2-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "kde-config-mailtransport",
            "binary_version": "19.12.3-0ubuntu1"
          },
          {
            "binary_name": "kmailtransport-akonadi",
            "binary_version": "19.12.3-0ubuntu1"
          },
          {
            "binary_name": "libkf5mailtransport-data",
            "binary_version": "19.12.3-0ubuntu1"
          },
          {
            "binary_name": "libkf5mailtransport5abi2",
            "binary_version": "19.12.3-0ubuntu1"
          },
          {
            "binary_name": "libkf5mailtransportakonadi5",
            "binary_version": "19.12.3-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "kmailtransport",
        "purl": "pkg:deb/ubuntu/kmailtransport@19.12.3-0ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "19.04.3-0ubuntu1",
        "19.04.3-0ubuntu2",
        "19.12.3-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libkpimsmtp5abi1",
            "binary_version": "19.12.3-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ksmtp",
        "purl": "pkg:deb/ubuntu/ksmtp@19.12.3-0ubuntu2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "19.04.3-0ubuntu1",
        "19.04.3-0ubuntu2",
        "19.12.3-0ubuntu1",
        "19.12.3-0ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless \"Server requires authentication\" is checked.",
  "id": "UBUNTU-CVE-2021-38373",
  "modified": "2026-04-22T07:40:08Z",
  "published": "2021-08-10T15:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38373"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.kde.org/show_bug.cgi?id=423423"
    },
    {
      "type": "REPORT",
      "url": "https://nostarttls.secvuln.info"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-38373"
    },
    {
      "type": "REPORT",
      "url": "https://kde.org/info/security/advisory-20211118-1.txt"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-38373"
  ]
}



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