CentOS Linux 6 [TuxCare] Security Update: php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1778055087)

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

include('compat.inc');

if (description)
{
  script_id(353170);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/30");

  script_cve_id("CVE-2018-5711", "CVE-2018-10545", "CVE-2018-17082");
  script_xref(name:"CLSA", value:"2026:1778055087");

  script_name(english:"CentOS Linux 6 [TuxCare] Security Update: php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1778055087)");

  script_set_attribute(attribute:"synopsis", value:
"The CentOS Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare CENTOS6:CLSA-2026:1778055087 advisory.

  - An issue was discovered in PHP before 5.6.35, 7.0.x before 7.0.29, 7.1.x before 7.1.16, and 7.2.x before
    7.2.4. Dumpable FPM child processes allow bypassing opcache access controls because fpm_unix.c makes a
    PR_SET_DUMPABLE prctl call, allowing one user (in a multiuser environment) to obtain sensitive information
    from the process memory of a second user's PHP applications by running gcore on the PID of the PHP-FPM
    worker process. (CVE-2018-10545)

  - The Apache2 component in PHP before 5.6.38, 7.0.x before 7.0.32, 7.1.x before 7.1.22, and 7.2.x before
    7.2.10 allows XSS via the body of a Transfer-Encoding: chunked request, because the bucket brigade is
    mishandled in the php_handler function in sapi/apache2handler/sapi_apache2.c. (CVE-2018-17082)

  - gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.33, 7.0.x before 7.0.27,
    7.1.x before 7.1.13, and 7.2.x before 7.2.1, has an integer signedness error that leads to an infinite
    loop via a crafted GIF file, as demonstrated by a call to the imagecreatefromgif or imagecreatefromstring
    PHP function. This is related to GetCode_ and gdImageCreateFromGifCtx. (CVE-2018-5711)

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/centos6els/advisories/2026/clsa-2026_1778055087.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e2581081");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1778055087");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory CENTOS6:CLSA-2026:1778055087.");
  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:L/PR:N/UI:R/S:C/C:L/I:L/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-2018-17082");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/30");

  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:"CentOS 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/CentOS/release", "Host/CentOS/rpm-list");

  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) || 'CentOS Linux' >!< os_product) audit(AUDIT_OS_NOT, 'CentOS Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS Linux');
if (! preg(pattern:"^6([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'CentOS Linux 6', 'CentOS Linux ' + os_version);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS Linux', cpu);


var constraints = [
  {
    'release': '6',
    'pkgs': [
      {'reference':'php-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-imap-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-tidy-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-zts-5.3.3-55.el6.tuxcare.els17', 'cpu':'x86_64', '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_WARNING,
      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, 'php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc');
}