Linux Distros Unpatched Vulnerability : CVE-2025-53506

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

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{
  script_id(245768);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/03");

  script_cve_id("CVE-2025-53506");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-53506");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge
    the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects
    Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through
    9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected:
    8.5.0 through 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to
    version 11.0.9, 10.1.43 or 9.0.107, which fix the issue. (CVE-2025-53506)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2025-53506");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2025-53506");
  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:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-53506");

  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_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/07/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:pki-servlet-4.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:pki-servlet-engine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-el-2.2-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-jsp-2.2-api");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-lib");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-el-2.1-api");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-jsp-2.1-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-log4j");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-servlet-2.5-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat6-webapps");
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  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Red Hat Enterprise Linux-6", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04", "Host/OS/Ubuntu Linux-25.10", "Host/OS/Ubuntu Linux-26.04");

  exit(0);
}

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);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "tomcat8"},
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "tomcat10"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "tomcat10"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "tomcat10"},
          {"reference": "tomcat11"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "tomcat10"},
          {"reference": "tomcat11"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "tomcat6"},
          {"reference": "tomcat6-admin-webapps"},
          {"reference": "tomcat6-docs-webapp"},
          {"reference": "tomcat6-el-2.1-api"},
          {"reference": "tomcat6-javadoc"},
          {"reference": "tomcat6-jsp-2.1-api"},
          {"reference": "tomcat6-lib"},
          {"reference": "tomcat6-log4j"},
          {"reference": "tomcat6-servlet-2.5-api"},
          {"reference": "tomcat6-webapps"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-2.2-api"},
          {"reference": "tomcat-javadoc"},
          {"reference": "tomcat-jsp-2.2-api"},
          {"reference": "tomcat-jsvc"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-3.0-api"},
          {"reference": "tomcat-webapps"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-2.2-api"},
          {"reference": "tomcat-javadoc"},
          {"reference": "tomcat-jsp-2.2-api"},
          {"reference": "tomcat-jsvc"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-3.0-api"},
          {"reference": "tomcat-webapps"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "pki-servlet-4.0-api"},
          {"reference": "pki-servlet-engine"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "pki-servlet-4.0-api"},
          {"reference": "pki-servlet-engine"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "pki-servlet-4.0-api"},
          {"reference": "pki-servlet-engine"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}