Vulnerabilities > CVE-2019-11755 - Improper Verification of Cryptographic Signature vulnerability in Mozilla Thunderbird

#
# (C) Tenable Network Security, Inc.
#

# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2019-32.
# The text itself is copyright (C) Mozilla Foundation.

include("compat.inc");

if (description)
{
  script_id(129389);
  script_version("1.6");
  script_cvs_date("Date: 2020/02/14");

  script_cve_id("CVE-2019-11755");
  script_xref(name:"MFSA", value:"2019-32");

  script_name(english:"Mozilla Thunderbird < 68.1.1");
  script_summary(english:"Checks the version of Thunderbird.");

  script_set_attribute(attribute:"synopsis", value:
"A mail client installed on the remote macOS or Mac OS X host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 68.1.1. It is, therefore, affected
by a vulnerability as referenced in the mfsa2019-32 advisory.

  - 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.
    (CVE-2019-11755)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2019-32/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Thunderbird version 68.1.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-11755");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/09/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/09/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:thunderbird");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_thunderbird_installed.nasl");
  script_require_keys("MacOSX/Thunderbird/Installed");

  exit(0);
}

include("mozilla_version.inc");

kb_base = "MacOSX/Thunderbird";
get_kb_item_or_exit(kb_base+"/Installed");

version = get_kb_item_or_exit(kb_base+"/Version", exit_code:1);
path = get_kb_item_or_exit(kb_base+"/Path", exit_code:1);

is_esr = get_kb_item(kb_base+"/is_esr");
if (is_esr) exit(0, 'The Mozilla Thunderbird installation is in the ESR branch.');

mozilla_check_version(version:version, path:path, product:'thunderbird', esr:FALSE, fix:'68.1.1', severity:SECURITY_WARNING);