Linux Distros Unpatched Vulnerability : CVE-2026-25854

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

include('compat.inc');

if (description)
{
  script_id(305907);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/03");

  script_cve_id("CVE-2026-25854");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-25854");

  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.

  - Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the
    LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from
    10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100. Other, unsupported
    versions may also be affected Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116,
    which fix the issue. (CVE-2026-25854)

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-2026-25854");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-25854");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-25854");
  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:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/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:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-25854");

  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:"2026/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/10");

  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");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tomcat9");
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  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");
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  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-jsvc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-servlet-3.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-servlet-4.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-servlet-6.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-el-3.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-jsp-2.3-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-servlet-4.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:tomcat9-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat11");
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  script_category(ACT_GATHER_INFO);
  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", "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/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Red Hat Enterprise Linux-10", "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-25.10", "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 = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "libtomcat10-embed-java"},
          {"reference": "libtomcat10-java"},
          {"reference": "tomcat10"},
          {"reference": "tomcat10-admin"},
          {"reference": "tomcat10-common"},
          {"reference": "tomcat10-docs"},
          {"reference": "tomcat10-examples"},
          {"reference": "tomcat10-user"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libtomcat10-embed-java"},
          {"reference": "libtomcat10-java"},
          {"reference": "libtomcat11-embed-java"},
          {"reference": "libtomcat11-java"},
          {"reference": "tomcat10"},
          {"reference": "tomcat10-admin"},
          {"reference": "tomcat10-common"},
          {"reference": "tomcat10-docs"},
          {"reference": "tomcat10-examples"},
          {"reference": "tomcat10-user"},
          {"reference": "tomcat11"},
          {"reference": "tomcat11-admin"},
          {"reference": "tomcat11-common"},
          {"reference": "tomcat11-docs"},
          {"reference": "tomcat11-examples"},
          {"reference": "tomcat11-user"}
        ]
      }
    ]
  },
  "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"},
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "tomcat10"},
          {"reference": "tomcat11"},
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "tomcat10"},
          {"reference": "tomcat11"},
          {"reference": "tomcat9"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-5.0-api"},
          {"reference": "tomcat-jsp-3.1-api"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-6.0-api"},
          {"reference": "tomcat-webapps"},
          {"reference": "tomcat9"},
          {"reference": "tomcat9-admin-webapps"},
          {"reference": "tomcat9-docs-webapp"},
          {"reference": "tomcat9-el-3.0-api"},
          {"reference": "tomcat9-jsp-2.3-api"},
          {"reference": "tomcat9-lib"},
          {"reference": "tomcat9-servlet-4.0-api"},
          {"reference": "tomcat9-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"},
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-3.0-api"},
          {"reference": "tomcat-jsp-2.3-api"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-4.0-api"},
          {"reference": "tomcat-webapps"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "pki-servlet-4.0-api"},
          {"reference": "pki-servlet-engine"},
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-3.0-api"},
          {"reference": "tomcat-jsp-2.3-api"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-4.0-api"},
          {"reference": "tomcat-webapps"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "pki-servlet-4.0-api"},
          {"reference": "pki-servlet-engine"},
          {"reference": "tomcat"},
          {"reference": "tomcat-admin-webapps"},
          {"reference": "tomcat-docs-webapp"},
          {"reference": "tomcat-el-3.0-api"},
          {"reference": "tomcat-jsp-2.3-api"},
          {"reference": "tomcat-lib"},
          {"reference": "tomcat-servlet-4.0-api"},
          {"reference": "tomcat-webapps"}
        ]
      }
    ]
  }
};

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');
}