ubuntu-cve-2020-12398
Vulnerability from osv_ubuntu
Published
2020-06-09 00:00
Modified
2026-04-22 07:39
Summary
Details

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "thunderbird",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          },
          {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          },
          {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          },
          {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          },
          {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          },
          {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:68.10.0+build1-0ubuntu0.16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "thunderbird",
        "purl": "pkg:deb/ubuntu/thunderbird@1:68.10.0+build1-0ubuntu0.16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:68.10.0+build1-0ubuntu0.16.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:38.3.0+build1-0ubuntu2",
        "1:38.5.1+build2-0ubuntu1",
        "1:38.6.0+build1-0ubuntu1",
        "1:38.7.2+build1-0ubuntu0.16.04.1",
        "1:38.8.0+build1-0ubuntu0.16.04.1",
        "1:45.2.0+build1-0ubuntu0.16.04.1",
        "1:45.3.0+build1-0ubuntu0.16.04.2",
        "1:45.4.0+build1-0ubuntu0.16.04.1",
        "1:45.5.1+build1-0ubuntu0.16.04.1",
        "1:45.7.0+build1-0ubuntu0.16.04.1",
        "1:45.8.0+build1-0ubuntu0.16.04.1",
        "1:52.1.1+build1-0ubuntu0.16.04.1",
        "1:52.2.1+build1-0ubuntu0.16.04.1",
        "1:52.3.0+build1-0ubuntu0.16.04.1",
        "1:52.4.0+build1-0ubuntu0.16.04.2",
        "1:52.5.0+build1-0ubuntu0.16.04.1",
        "1:52.6.0+build1-0ubuntu0.16.04.1",
        "1:52.7.0+build1-0ubuntu0.16.04.1",
        "1:52.8.0+build1-0ubuntu0.16.04.1",
        "1:52.9.1+build3-0ubuntu0.16.04.1",
        "1:60.2.1+build1-0ubuntu0.16.04.4",
        "1:60.4.0+build2-0ubuntu0.16.04.1",
        "1:60.5.1+build2-0ubuntu0.16.04.1",
        "1:60.6.1+build2-0ubuntu0.16.04.1",
        "1:60.7.0+build1-0ubuntu0.16.04.1",
        "1:60.7.1+build1-0ubuntu0.16.04.1",
        "1:60.7.2+build2-0ubuntu0.16.04.1",
        "1:60.8.0+build1-0ubuntu0.16.04.2",
        "1:60.9.0+build1-0ubuntu0.16.04.2",
        "1:60.9.1+build1-0ubuntu0.16.04.1",
        "1:68.7.0+build1-0ubuntu0.16.04.2",
        "1:68.8.0+build2-0ubuntu0.16.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "thunderbird",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:68.10.0+build1-0ubuntu0.18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "thunderbird",
        "purl": "pkg:deb/ubuntu/thunderbird@1:68.10.0+build1-0ubuntu0.18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:68.10.0+build1-0ubuntu0.18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:52.4.0+build1-0ubuntu2",
        "1:52.6.0+build1-0ubuntu1",
        "1:52.7.0+build1-0ubuntu1",
        "1:52.8.0+build1-0ubuntu0.18.04.1",
        "1:52.9.1+build3-0ubuntu0.18.04.1",
        "1:60.2.1+build1-0ubuntu0.18.04.2",
        "1:60.4.0+build2-0ubuntu0.18.04.1",
        "1:60.5.1+build2-0ubuntu0.18.04.1",
        "1:60.6.1+build2-0ubuntu0.18.04.1",
        "1:60.7.0+build1-0ubuntu0.18.04.1",
        "1:60.7.1+build1-0ubuntu0.18.04.1",
        "1:60.7.2+build2-0ubuntu0.18.04.1",
        "1:60.8.0+build1-0ubuntu0.18.04.1",
        "1:60.9.0+build1-0ubuntu0.18.04.1",
        "1:68.2.1+build1-0ubuntu0.18.04.1",
        "1:68.2.2+build1-0ubuntu0.18.04.1",
        "1:68.4.1+build1-0ubuntu0.18.04.1",
        "1:68.7.0+build1-0ubuntu0.18.04.1",
        "1:68.8.0+build2-0ubuntu0.18.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "thunderbird",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:68.10.0+build1-0ubuntu0.20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "thunderbird",
        "purl": "pkg:deb/ubuntu/thunderbird@1:68.10.0+build1-0ubuntu0.20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:68.10.0+build1-0ubuntu0.20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:68.1.2+build1-0ubuntu1",
        "1:68.1.2+build1-0ubuntu2",
        "1:68.2.1+build1-0ubuntu1",
        "1:68.2.2+build1-0ubuntu1",
        "1:68.3.0+build2-0ubuntu1",
        "1:68.3.1+build1-0ubuntu2",
        "1:68.4.1+build1-0ubuntu1",
        "1:68.4.2+build2-0ubuntu1",
        "1:68.5.0+build1-0ubuntu1",
        "1:68.6.0+build2-0ubuntu1",
        "1:68.7.0+build1-0ubuntu1",
        "1:68.7.0+build1-0ubuntu2",
        "1:68.8.0+build2-0ubuntu0.20.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird \u003c 68.9.0.",
  "id": "UBUNTU-CVE-2020-12398",
  "modified": "2026-04-22T07:39:23Z",
  "published": "2020-06-09T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-12398"
    },
    {
      "type": "REPORT",
      "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/#CVE-2020-12398"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4421-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12398"
    }
  ],
  "related": [
    "USN-4421-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-12398"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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