Linux Distros Unpatched Vulnerability : CVE-2021-36373

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

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  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/21");

  script_cve_id("CVE-2021-36373");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2021-36373");

  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.

  - When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of
    memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt
    builds using Apache Ant. Apache Ant prior to 1.9.16 and 1.10.11 were affected. (CVE-2021-36373)

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-2021-36373");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-36373");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2021-36373");
  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:L/AC:L/PR:N/UI:R/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-2021-36373");

  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:"2021/07/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/05");

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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ant-commons-net");
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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("set_linux_os_id.nasl", "ssh_get_info2.nasl");
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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": "ant"},
          {"reference": "ant-doc"},
          {"reference": "ant-optional"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "ant"},
          {"reference": "ant-doc"},
          {"reference": "ant-gcj"},
          {"reference": "ant-optional"},
          {"reference": "ant-optional-gcj"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "ant"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "ant"},
          {"reference": "ant-antlr"},
          {"reference": "ant-apache-bcel"},
          {"reference": "ant-apache-bsf"},
          {"reference": "ant-apache-oro"},
          {"reference": "ant-apache-regexp"},
          {"reference": "ant-apache-resolver"},
          {"reference": "ant-apache-xalan2"},
          {"reference": "ant-commons-logging"},
          {"reference": "ant-commons-net"},
          {"reference": "ant-javamail"},
          {"reference": "ant-jdepend"},
          {"reference": "ant-jmf"},
          {"reference": "ant-jsch"},
          {"reference": "ant-junit"},
          {"reference": "ant-junit5"},
          {"reference": "ant-lib"},
          {"reference": "ant-manual"},
          {"reference": "ant-openjdk11"},
          {"reference": "ant-openjdk17"},
          {"reference": "ant-openjdk21"},
          {"reference": "ant-openjdk8"},
          {"reference": "ant-swing"},
          {"reference": "ant-testutil"},
          {"reference": "ant-unbound"},
          {"reference": "ant-xz"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "ant"},
          {"reference": "ant-antlr"},
          {"reference": "ant-apache-bcel"},
          {"reference": "ant-apache-bsf"},
          {"reference": "ant-apache-log4j"},
          {"reference": "ant-apache-oro"},
          {"reference": "ant-apache-regexp"},
          {"reference": "ant-apache-resolver"},
          {"reference": "ant-apache-xalan2"},
          {"reference": "ant-commons-logging"},
          {"reference": "ant-commons-net"},
          {"reference": "ant-javadoc"},
          {"reference": "ant-javamail"},
          {"reference": "ant-jdepend"},
          {"reference": "ant-jmf"},
          {"reference": "ant-jsch"},
          {"reference": "ant-junit"},
          {"reference": "ant-lib"},
          {"reference": "ant-manual"},
          {"reference": "ant-swing"},
          {"reference": "ant-testutil"},
          {"reference": "ant-xz"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "ant"},
          {"reference": "ant-antlr"},
          {"reference": "ant-apache-bcel"},
          {"reference": "ant-apache-bsf"},
          {"reference": "ant-apache-log4j"},
          {"reference": "ant-apache-oro"},
          {"reference": "ant-apache-regexp"},
          {"reference": "ant-apache-resolver"},
          {"reference": "ant-apache-xalan2"},
          {"reference": "ant-commons-logging"},
          {"reference": "ant-commons-net"},
          {"reference": "ant-javadoc"},
          {"reference": "ant-javamail"},
          {"reference": "ant-jdepend"},
          {"reference": "ant-jmf"},
          {"reference": "ant-jsch"},
          {"reference": "ant-junit"},
          {"reference": "ant-lib"},
          {"reference": "ant-manual"},
          {"reference": "ant-swing"},
          {"reference": "ant-testutil"},
          {"reference": "ant-xz"}
        ]
      }
    ]
  }
};

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');
}