Amazon Linux Unpatched Vulnerability : CVE-2026-109619

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

include('compat.inc');

if (description)
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  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id("CVE-2026-109619");

  script_name(english:"Amazon Linux Unpatched Vulnerability : CVE-2026-109619");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux host has one or more packages installed with a vulnerability that the vendor indicates will not
be patched.");
  script_set_attribute(attribute:"description", value:
"The remote Amazon Linux host has one or more packages installed that are impacted by a vulnerability without a vendor
supplied patch available.

  - 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)

  - 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-2026-109619)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-109619.html");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/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:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-109619");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/23");

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  script_family(english:"Misc.");

  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/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include('rpm2.inc');

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];

if (os_ver != "2" && os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2 or Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [];

if (os_ver == "2")
{
  pkgs = [
    "php", "php-bcmath", "php-cli", "php-common", "php-dba", "php-debuginfo",
    "php-devel", "php-embedded", "php-enchant", "php-fpm", "php-gd", "php-intl",
    "php-ldap", "php-mbstring", "php-mysqlnd", "php-odbc", "php-pdo", "php-pgsql",
    "php-process", "php-pspell", "php-recode", "php-snmp", "php-soap", "php-xml", "php-xmlrpc"
  ];
}
else if (os_ver == "-2023")
{
  pkgs = [
    "php8.1", "php8.1-bcmath", "php8.1-bcmath-debuginfo",
    "php8.1-cli", "php8.1-cli-debuginfo",
    "php8.1-common", "php8.1-common-debuginfo",
    "php8.1-dba", "php8.1-dba-debuginfo",
    "php8.1-dbg", "php8.1-dbg-debuginfo",
    "php8.1-debuginfo", "php8.1-debugsource",
    "php8.1-devel",
    "php8.1-embedded", "php8.1-embedded-debuginfo",
    "php8.1-enchant", "php8.1-enchant-debuginfo",
    "php8.1-ffi", "php8.1-ffi-debuginfo",
    "php8.1-fpm", "php8.1-fpm-debuginfo",
    "php8.1-gd", "php8.1-gd-debuginfo",
    "php8.1-gmp", "php8.1-gmp-debuginfo",
    "php8.1-intl", "php8.1-intl-debuginfo",
    "php8.1-ldap", "php8.1-ldap-debuginfo",
    "php8.1-mbstring", "php8.1-mbstring-debuginfo",
    "php8.1-mysqlnd", "php8.1-mysqlnd-debuginfo",
    "php8.1-odbc", "php8.1-odbc-debuginfo",
    "php8.1-opcache", "php8.1-opcache-debuginfo",
    "php8.1-pdo", "php8.1-pdo-debuginfo",
    "php8.1-pgsql", "php8.1-pgsql-debuginfo",
    "php8.1-process", "php8.1-process-debuginfo",
    "php8.1-pspell", "php8.1-pspell-debuginfo",
    "php8.1-snmp", "php8.1-snmp-debuginfo",
    "php8.1-soap", "php8.1-soap-debuginfo",
    "php8.1-tidy", "php8.1-tidy-debuginfo",
    "php8.1-xml", "php8.1-xml-debuginfo",
    "php8.1-zip", "php8.1-zip-debuginfo"
  ];
}

var flag = 0;
var cves = ["CVE-2026-109619"];

foreach var pkg (pkgs)
{
  if (unpatched_package_exists(package:pkg, release:alas_release, cves:cves))
    flag++;
}

if (flag)
{
  security_report_v4(
    port     : 0,
    severity : SECURITY_HOLE,
    extra    : unpatched_packages_report()
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}