Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : OpenEXR vulnerabilities (USN-4339-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4339-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136028);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id(
    "CVE-2017-9111",
    "CVE-2017-9113",
    "CVE-2017-9115",
    "CVE-2018-18444",
    "CVE-2020-11758",
    "CVE-2020-11759",
    "CVE-2020-11760",
    "CVE-2020-11761",
    "CVE-2020-11762",
    "CVE-2020-11763",
    "CVE-2020-11764",
    "CVE-2020-11765"
  );
  script_xref(name:"USN", value:"4339-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : OpenEXR vulnerabilities (USN-4339-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Brandon Perry discovered that OpenEXR incorrectly handled certain
malformed EXR image files. If a user were tricked into opening a
crafted EXR image file, a remote attacker could cause a denial of
service, or possibly execute arbitrary code. This issue only applied
to Ubuntu 20.04 LTS. (CVE-2017-9111, CVE-2017-9113, CVE-2017-9115)

Tan Jie discovered that OpenEXR incorrectly handled certain malformed
EXR image files. If a user were tricked into opening a crafted EXR
image file, a remote attacker could cause a denial of service, or
possibly execute arbitrary code. This issue only applied to Ubuntu
20.04 LTS. (CVE-2018-18444)

Samuel Gross discovered that OpenEXR incorrectly handled certain
malformed EXR image files. If a user were tricked into opening a
crafted EXR image file, a remote attacker could cause a denial of
service, or possibly execute arbitrary code. (CVE-2020-11758,
CVE-2020-11759, CVE-2020-11760, CVE-2020-11761, CVE-2020-11762,
CVE-2020-11763, CVE-2020-11764)

It was discovered that OpenEXR incorrectly handled certain malformed
EXR image files. If a user were tricked into opening a crafted EXR
image file, a remote attacker could cause a denial of service.
(CVE-2020-11765).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4339-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-18444");

  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:"2017/05/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libopenexr22");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libopenexr24");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openexr");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libopenexr-dev");
  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) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04', '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 pkgs = [
    {'osver': '16.04', 'pkgname': 'libopenexr-dev', 'pkgver': '2.2.0-10ubuntu2.2'},
    {'osver': '16.04', 'pkgname': 'libopenexr22', 'pkgver': '2.2.0-10ubuntu2.2'},
    {'osver': '16.04', 'pkgname': 'openexr', 'pkgver': '2.2.0-10ubuntu2.2'},
    {'osver': '18.04', 'pkgname': 'libopenexr-dev', 'pkgver': '2.2.0-11.1ubuntu1.2'},
    {'osver': '18.04', 'pkgname': 'libopenexr22', 'pkgver': '2.2.0-11.1ubuntu1.2'},
    {'osver': '18.04', 'pkgname': 'openexr', 'pkgver': '2.2.0-11.1ubuntu1.2'},
    {'osver': '20.04', 'pkgname': 'libopenexr-dev', 'pkgver': '2.3.0-6ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'libopenexr24', 'pkgver': '2.3.0-6ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'openexr', 'pkgver': '2.3.0-6ubuntu0.1'}
];

var flag = 0;
foreach 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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libopenexr-dev / libopenexr22 / libopenexr24 / openexr');
}