CentOS Linux 7 [TuxCare] Security Update: php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc Multiple Vulnerabilities (CENTOS7:CLSA-2026:1792616669)

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

include('compat.inc');

if (description)
{
  script_id(370240);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/22");

  script_cve_id("CVE-2026-92842", "CVE-2026-93682");
  script_xref(name:"CLSA", value:"2026:1792616669");

  script_name(english:"CentOS Linux 7 [TuxCare] Security Update: php / php-bcmath / php-cli / php-common / php-dba / php-devel / etc Multiple Vulnerabilities (CENTOS7:CLSA-2026:1792616669)");

  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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare CENTOS7:CLSA-2026:1792616669 advisory.

  - The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream
    filters accept a line-break-chars option whose length is tracked separately from the string itself. The
    filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping
    the original length. When the filter later emits a line break it copies the recorded length out of the
    truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.
    (CVE-2026-92842)

  - When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty
    value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of
    that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the
    client is sent to the host root or to the current directory. (CVE-2026-93682)

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/centos7els/advisories/2026/clsa-2026_1792616669.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9fe4a757");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1792616669");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory CENTOS7:CLSA-2026:1792616669.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:H/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:"cvss_score_source", value:"CVE-2026-92842");

  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:"2026/09/22");
  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:"^7([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'CentOS Linux 7', '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 ('aarch64' >!< cpu && cpu !~ "^i[3-6]86$" && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS Linux', cpu);


var constraints = [
  {
    'release': '7',
    'pkgs': [
      {'reference':'php-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-bcmath-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-cli-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-common-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-dba-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-devel-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-embedded-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-enchant-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-fpm-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-gd-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-intl-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-ldap-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mbstring-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysql-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysqlnd-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysqlnd-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-mysqlnd-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-odbc-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pdo-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pgsql-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-process-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-pspell-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-recode-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-snmp-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-soap-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xml-5.4.16-48.el7.tuxcare.els20', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.4.16-48.el7.tuxcare.els20', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.4.16-48.el7.tuxcare.els20', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'php-xmlrpc-5.4.16-48.el7.tuxcare.els20', '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');
}