Ubuntu 16.04 ESM / 18.04 ESM / 22.04 ESM : VIPS vulnerabilities (USN-6437-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6437-1. 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(183342);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2018-7998",
    "CVE-2019-6976",
    "CVE-2020-20739",
    "CVE-2021-27847",
    "CVE-2023-40032"
  );
  script_xref(name:"USN", value:"6437-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 22.04 ESM : VIPS vulnerabilities (USN-6437-1)");

  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 16.04 ESM / 18.04 ESM / 22.04 ESM host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6437-1 advisory.

    Ziqiang Gu discovered that VIPS could be made to dereference a NULL

    pointer. If a user or automated system were tricked into processing

    a specially crafted input image file, an attacker could possibly use this issue to cause a denial of
    service. This issue only affected

    Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-7998)

    It was discovered that VIPS did not properly handle uninitialized memory locations when processing
    corrupted input image data. An attacker could

    possibly use this issue to generate output images that expose sensitive

    information. This issue only affected Ubuntu 16.04 LTS

    and Ubuntu 18.04 LTS. (CVE-2019-6976)

    It was discovered that VIPS did not properly manage memory due to an

    uninitialized variable. If a user or automated system were tricked into

    processing a specially crafted output file, an attacker could possibly

    use this issue to expose sensitive information.

    This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

    (CVE-2020-20739)

    It was discovered that VIPS could be made to divide by zero in multiple

    funcions. If a user or automated system were tricked into processing a

    specially crafted image file, an attacker could possibly use this issue

    to cause a denial of service. This issue only affected Ubuntu 16.04 LTS

    and Ubuntu 18.04 LTS. (CVE-2021-27847)

    It was discovered that VIPS did not properly handle certain input files

    that contained malformed UTF-8 characters. If a user or automated system

    were tricked into processing a specially crafted SVG image file, an

    attacker could possibly use this issue to cause a denial of service.

    This issue only affected Ubuntu 22.04 LTS. (CVE-2023-40032)

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-6437-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:H/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-2018-7998");

  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:"2018/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gir1.2-vips-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvips-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvips-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libvips42");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-vipscc");
  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) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 22.04', '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': '16.04', 'pkgname': 'gir1.2-vips-8.0', 'pkgver': '8.2.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libvips-dev', 'pkgver': '8.2.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libvips-tools', 'pkgver': '8.2.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'libvips42', 'pkgver': '8.2.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'python-vipscc', 'pkgver': '8.2.2-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'gir1.2-vips-8.0', 'pkgver': '8.4.5-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libvips-dev', 'pkgver': '8.4.5-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libvips-tools', 'pkgver': '8.4.5-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libvips42', 'pkgver': '8.4.5-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'python-vipscc', 'pkgver': '8.4.5-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'gir1.2-vips-8.0', 'pkgver': '8.12.1-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libvips-dev', 'pkgver': '8.12.1-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libvips-tools', 'pkgver': '8.12.1-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'libvips42', 'pkgver': '8.12.1-1ubuntu0.1~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'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) {
        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, 'gir1.2-vips-8.0 / libvips-dev / libvips-tools / libvips42 / etc');
}