CentOS Linux 6 [TuxCare] Security Update: php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1792612974)

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

include('compat.inc');

if (description)
{
  script_id(370234);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/22");

  script_cve_id("CVE-2026-109618", "CVE-2026-109619");
  script_xref(name:"CLSA", value:"2026:1792612974");

  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-2026:1792612974)");

  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-2026:1792612974 advisory.

  - PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the
    request. Some contexts may not properly account for this scenario and leave request memory in an
    uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or
    branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote
    code execution (RCE). (CVE-2026-109618)

  - A critical vulnerability has been discovered in PHP that will be addressed in a Critical PHP Security
    Release on October 21, 2026. Full details have not yet been shared, but public reporting from several
    trusted sources indicates this is one of the two CVEs that will be included in this release. When this
    flaw is chained with another PHP vulnerability, attackers could gain remote code execution. The chain has
    been dubbed php2shell by researchers at Calif. This description will be updated once PHP publishes full
    details. (CVE-2026-109618, CVE-2026-109619)

  - PHP has various global state that temporarily points into request memory. In some scenarios, global state
    may not be correctly reset, or may be repopulated after being reset. The global state may then refer to
    request memory even after it has been freed. Subsequent requests may read or branch on this stale state
    before it is fully initialized. Multiple strategies can trigger this condition and produce remote code
    execution (RCE). (CVE-2026-109619)

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_1792612974.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f77003b4");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1792612974");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory CENTOS6:CLSA-2026:1792612974.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:H/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:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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-2026-109619");

  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:"Low");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/22");

  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 (cpu !~ "^i[3-6]86$" && '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.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-imap-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-imap-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-tidy-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-tidy-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.3.3-55.el6.tuxcare.els22', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-zts-5.3.3-55.el6.tuxcare.els22', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-zts-5.3.3-55.el6.tuxcare.els22', '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_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, 'php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc');
}