Rocky Linux 9.6 [TuxCare] Security Update: ImageMagick / ImageMagick-c++ / ImageMagick-c++-devel / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1791540596)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(364431);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/12");

  script_cve_id("CVE-2026-25965", "CVE-2026-86420", "CVE-2026-86421");
  script_xref(name:"CLSA", value:"2026:1791540596");

  script_name(english:"Rocky Linux 9.6 [TuxCare] Security Update: ImageMagick / ImageMagick-c++ / ImageMagick-c++-devel / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1791540596)");

  script_set_attribute(attribute:"synopsis", value:
"The Rocky Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare ALMALINUX9.6:CLSA-2026:1791540596 advisory.

  - ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to
    versions 7.1.2-15 and 6.9.13-40, ImageMagick's path security policy is enforced on the raw filename string
    before the filesystem resolves it. As a result, a policy rule such as /etc/* can be bypassed by a path
    traversal. The OS resolves the traversal and opens the sensitive file, but the policy matcher only sees
    the unnormalized path and therefore allows the read. This enables local file disclosure (LFI) even when
    policy-secure.xml is applied. Actions to prevent reading from files have been taken in versions .7.1.2-15
    and 6.9.13-40 But it make sure writing is also not possible the following should be added to one's policy.
    This will also be included in ImageMagick's more secure policies by default. (CVE-2026-25965)

  - ImageMagick before 7.1.2-30 and 6.9.13-55 fails to properly lower the memory budget when an operation
    inside OpenPixelCache fails. Repeated triggering of such failures can exhaust the process memory budget
    and result in a denial of service. (CVE-2026-86420)

  - ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL
    image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and
    cause a denial of service. (CVE-2026-86421)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/advisories/2026/clsa-2026_1791540596.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9b362d3d");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1791540596");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1791540596.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/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:H/I:N/A:N");
  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:N/AC:H/AT:P/PR:N/UI:N/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-2026-25965");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-86421");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OS/extended-third-party", "Host/local_checks_enabled", "Host/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'Rocky Linux' >!< os_product) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
if (! preg(pattern:"^9.6([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Rocky Linux 9.6', 'Rocky Linux ' + os_version);

if (!get_kb_item('Host/RockyLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && cpu !~ "^i[3-6]86$" && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Rocky Linux', cpu);


var constraints = [
  {
    'release': '9',
    'sp': '6',
    'pkgs': [
      {'reference':'ImageMagick-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-c++-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-devel-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-djvu-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-djvu-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-djvu-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-doc-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-doc-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-doc-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-libs-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-libs-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-libs-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-perl-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'aarch64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-perl-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'i686', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'ImageMagick-perl-6.9.13.52-2.el9_6.tuxcare.els5', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}


if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ImageMagick / ImageMagick-c++ / ImageMagick-c++-devel / etc');
}