Ubuntu 18.04 LTS : PIM Messagelib vulnerabilities (USN-7730-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7730-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(261432);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/05");

  script_cve_id("CVE-2017-17689", "CVE-2019-10732");
  script_xref(name:"USN", value:"7730-1");

  script_name(english:"Ubuntu 18.04 LTS : PIM Messagelib vulnerabilities (USN-7730-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-7730-1 advisory.

    Damian Poddebniak, Christian Dresen, Jens Mller, Fabian Ising, Sebastian Schinzel, Simon Friedberger,
    Juraj Somorovsky, and Jrg Schwenk discovered that PIM Messagelib could be made to leak the plaintext of
    S/MIME encrypted emails when retrieving external content in emails. Under certain configurations, if a
    user were tricked into opening a specially crafted email using an application linked against PIM
    Messagelib, an attacker could possibly use this issue to obtain the plaintext of an encrypted email. This
    update mitigates the issue by preventing automatic loading of external content. (CVE-2017-17689)

    Jens Mller, Marcus Brinkmann, Damian Poddebniak, Sebastian Schinzel, and Jrg Schwenk discovered that
    PIM Messagelib could be made to leak the plaintext of S/MIME or PGP encrypted emails. If a user were
    tricked into replying to a specially crafted email using an application linked against PIM Messagelib, an
    attacker could possibly use this issue to obtain the plaintext of an encrypted email. (CVE-2019-10732)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-7730-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-10732");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2017-17689");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:kf5-messagelib-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagecomposer-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagecomposer5abi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagecore-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagecore5abi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagelist-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messagelist5abi1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messageviewer-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messageviewer-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5messageviewer5abi4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5mimetreeparser-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5mimetreeparser5abi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5templateparser-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5templateparser5abi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5webengineviewer-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkf5webengineviewer5abi3");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2025 Canonical, Inc. / NASL script (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '18.04', 'pkgname': 'kf5-messagelib-data', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagecomposer-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagecomposer5abi2', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagecore-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagecore5abi2', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagelist-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messagelist5abi1', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messageviewer-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messageviewer-plugins', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5messageviewer5abi4', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5mimetreeparser-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5mimetreeparser5abi2', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5templateparser-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5templateparser5abi2', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5webengineviewer-dev', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libkf5webengineviewer5abi3', 'pkgver': '4:17.12.3-0ubuntu3+esm1', 'ubuntu_pro': TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kf5-messagelib-data / libkf5messagecomposer-dev / etc');
}