Ubuntu 20.04 LTS / 26.04 LTS : ImageMagick vulnerabilities (USN-8810-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8810-1. 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)
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  script_id(349783);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/24");

  script_cve_id(
    "CVE-2026-33535",
    "CVE-2026-33536",
    "CVE-2026-34238",
    "CVE-2026-40310",
    "CVE-2026-40311",
    "CVE-2026-40312",
    "CVE-2026-56361"
  );
  script_xref(name:"IAVB", value:"2026-B-0078-S");
  script_xref(name:"IAVB", value:"2026-B-0093-S");
  script_xref(name:"USN", value:"8810-1");

  script_name(english:"Ubuntu 20.04 LTS / 26.04 LTS : ImageMagick vulnerabilities (USN-8810-1)");

  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 20.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-8810-1 advisory.

    It was discovered that ImageMagick did not correctly handle certain memory operations. An attacker could
    possibly use this issue to cause a denial of service. This issue affected Ubuntu 14.04 LTS, Ubuntu 16.04
    LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-33535)

    Kamil Frankowicz discovered that ImageMagick did not correctly handle certain memory operations. An
    attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue
    affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and
    Ubuntu 24.04 LTS. (CVE-2026-33536)

    It was discovered that ImageMagick did not correctly handle certain integer arithmetic. An attacker could
    possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-34238)

    Jake Lamberson discovered that ImageMagick did not correctly handle certain memory operations. An attacker
    could possibly use this issue to cause a denial of service or execute arbitrary code. This issue affected
    Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04
    LTS. (CVE-2026-40310)

    Junmin Zhu discovered that ImageMagick did not correctly handle certain memory operations. An attacker
    could possibly use this issue to cause a denial of service. This issue affected Ubuntu 18.04 LTS, Ubuntu
    20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-40311)

    It was discovered that ImageMagick did not correctly handle opening certain MSL files. If a user or
    automated system were tricked into opening a specially crafted file, an attacker could possibly cause a
    denial of service. This issue affected Ubuntu 26.04 LTS. (CVE-2026-40312)

    It was discovered that ImageMagick did not correctly handle certain memory operations. An attacker could
    possibly use this issue to execute arbitrary code. (CVE-2026-56361)

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-8810-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-56361");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16hdri");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-7-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-7.q16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-7.q16hdri");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:imagemagick-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libimage-magick-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16hdri-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagick++-6-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagick++-6.q16-8");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-arch-config");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-headers");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7.q16hdri-10");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16hdri-6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7.q16-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7.q16hdri-10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:perlmagick");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 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 (! ('20.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 26.04', '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': '20.04', 'pkgname': 'imagemagick', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'imagemagick-6-common', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'imagemagick-6.q16', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'imagemagick-6.q16hdri', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'imagemagick-common', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libimage-magick-perl', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libimage-magick-q16-perl', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libimage-magick-q16hdri-perl', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagick++-6-headers', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagick++-6.q16-8', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagick++-6.q16hdri-8', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6-arch-config', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6-headers', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6.q16-6', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6.q16-6-extra', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6.q16hdri-6', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickcore-6.q16hdri-6-extra', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickwand-6-headers', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickwand-6.q16-6', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'libmagickwand-6.q16hdri-6', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '20.04', 'pkgname': 'perlmagick', 'pkgver': '8:6.9.10.23+dfsg-2.1ubuntu11.11+esm15'},
    {'osver': '26.04', 'pkgname': 'imagemagick', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'imagemagick-7-common', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'imagemagick-7.q16', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'imagemagick-7.q16hdri', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libimage-magick-perl', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libimage-magick-q16-perl', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libimage-magick-q16hdri-perl', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagick++-7-headers', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagick++-7.q16-5', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagick++-7.q16hdri-5', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7-arch-config', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7-headers', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7.q16-10', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7.q16-10-extra', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7.q16hdri-10', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickcore-7.q16hdri-10-extra', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickwand-7-headers', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickwand-7.q16-10', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'libmagickwand-7.q16hdri-10', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'},
    {'osver': '26.04', 'pkgname': 'perlmagick', 'pkgver': '8:7.1.2.18+dfsg1-1ubuntu0.1~esm3'}
];

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'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  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, 'imagemagick / imagemagick-6-common / imagemagick-6.q16 / etc');
}