Linux Distros Unpatched Vulnerability : CVE-2026-24400

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

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  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/22");

  script_cve_id("CVE-2026-24400");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-24400");

  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.

  - AssertJ provides Fluent testing assertions for Java and the Java Virtual Machine (JVM). Starting in
    version 1.4.0 and prior to version 3.27.7, an XML External Entity (XXE) vulnerability exists in
    `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes
    `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This
    formatter is used by the `isXmlEqualTo(CharSequence)` assertion for `CharSequence` values. An application
    is vulnerable only when it uses untrusted XML input with either `isXmlEqualTo(CharSequence)` from
    `org.assertj.core.api.AbstractCharSequenceAssert` or `xmlPrettyFormat(String)` from
    `org.assertj.core.util.xml.XmlStringPrettyFormatter`. If untrusted XML input is processed by tone of these
    methods, an attacker couldnread arbitrary local files via `file://` URIs (e.g., `/etc/passwd`, application
    configuration files); perform Server-Side Request Forgery (SSRF) via HTTP/HTTPS URIs, and/or cause Denial
    of Service via Billion Laughs entity expansion attacks. `isXmlEqualTo(CharSequence)` has been deprecated
    in favor of XMLUnit in version 3.18.0 and will be removed in version 4.0. Users of affected versions
    should, in order of preference: replace `isXmlEqualTo(CharSequence)` with XMLUnit, upgrade to version
    3.27.7, or avoid using `isXmlEqualTo(CharSequence)` or `XmlStringPrettyFormatter` with untrusted input.
    `XmlStringPrettyFormatter` has historically been considered a utility for `isXmlEqualTo(CharSequence)`
    rather than a feature for AssertJ users, so it is deprecated in version 3.27.7 and removed in version 4.0,
    with no replacement. (CVE-2026-24400)

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-2026-24400");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-24400");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-24400");
  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:P/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:H/I:N/A:H");
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  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-24400");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/27");

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  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");
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  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-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "libassertj-core-java"}
        ]
      }
    ]
  },
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "libassertj-core-java"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libassertj-core-java"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "libassertj-core-java"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "assertj-core"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "assertj-core"},
          {"reference": "assertj-core-javadoc"},
          {"reference": "moditect"},
          {"reference": "moditect-javadoc"}
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      }
    ]
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  "CentOS Linux-8": {
    "package_manager": "rpm-list",
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        "release": "8",
        "pkgs": [
          {"reference": "assertj-core"},
          {"reference": "assertj-core-javadoc"},
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          {"reference": "log4j-jcl"},
          {"reference": "log4j-slf4j"},
          {"reference": "log4j-web"},
          {"reference": "maven-failsafe-plugin"},
          {"reference": "maven-surefire"},
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          {"reference": "maven-surefire-plugin"},
          {"reference": "maven-surefire-provider-junit"},
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    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "assertj-core"},
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          {"reference": "maven-surefire-javadoc"},
          {"reference": "maven-surefire-plugin"},
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          {"reference": "maven-surefire-provider-testng"},
          {"reference": "maven-surefire-report-parser"},
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          {"reference": "powermock"},
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          {"reference": "powermock-api-mockito"},
          {"reference": "powermock-api-support"},
          {"reference": "powermock-common"},
          {"reference": "powermock-core"},
          {"reference": "powermock-javadoc"},
          {"reference": "powermock-junit4"},
          {"reference": "powermock-reflect"},
          {"reference": "powermock-testng"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "assertj-core"},
          {"reference": "log4j"},
          {"reference": "log4j-jcl"},
          {"reference": "log4j-slf4j"},
          {"reference": "maven-enforcer-api"},
          {"reference": "maven-enforcer-plugin"},
          {"reference": "maven-enforcer-rules"}
        ]
      }
    ]
  }
};

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');
}