CVE-2019-11755 (GCVE-0-2019-11755)

Vulnerability from cvelistv5 – Published: 2019-09-27 17:10 – Updated: 2024-08-04 23:03
VLAI
Summary
A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • Spoofing a message author via a crafted S/MIME message
Assigner
References
URL Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1240290 x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://seclists.org/bugtraq/2019/Nov/24 mailing-listx_refsource_BUGTRAQ
https://www.debian.org/security/2019/dsa-4571 vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4202-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4335-1/ vendor-advisoryx_refsource_UBUNTU
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Affected: unspecified , < 68.1.1 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Issue Tracking",
              "Permissions Required",
              "Vendor Advisory"
            ],
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1240290"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2019/11/msg00017.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://seclists.org/bugtraq/2019/Nov/24"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://usn.ubuntu.com/4202-1/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://usn.ubuntu.com/4335-1/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.debian.org/security/2019/dsa-4571"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2019-32/"
          }
        ],
        "sourceIdentifier": "security@mozilla.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-347"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T16:51:41+00:00",
      "cve": "CVE-2019-11755",
      "id": "CVE-2019-11755",
      "initial_release_date": "2019-09-30T00:00:00+00:00",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "thunderbird: spoofing a message author via a crafted S/MIME",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-11755.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2025-10-07T09:31:18Z",
      "cve": "CVE-2019-11755",
      "id": "CVE-2019-11755",
      "initial_release_date": "2023-02-15T04:11:59Z",
      "product_status:recommended": "91",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-11755",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-11755.json",
      "version": "11"
    }
  }
}



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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.