Linux Distros Unpatched Vulnerability : CVE-2020-14339

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(223324);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/14");

  script_cve_id("CVE-2020-14339");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2020-14339");

  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.

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU
    process. This file descriptor allows for privileged operations to happen against the device-mapper on the
    host. This flaw allows a malicious guest user or process to perform operations outside of their standard
    permissions, potentially causing serious damage to the host operating system. The highest threat from this
    vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

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-2020-14339");
  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:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-14339");

  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:"2020/11/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:redhat:advanced_virtualization:8::el8");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-admin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-bash-completion");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-config-network");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-config-nwfilter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-interface");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-network");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-nodedev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-nwfilter");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-disk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-iscsi-direct");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-logical");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-mpath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-scsi");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-lock-sanlock");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/CentOS Linux-8", "Host/OS/Red Hat Enterprise Linux-8");

  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/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "libvirt"},
          {"reference": "libvirt-admin"},
          {"reference": "libvirt-bash-completion"},
          {"reference": "libvirt-client"},
          {"reference": "libvirt-daemon"},
          {"reference": "libvirt-daemon-config-network"},
          {"reference": "libvirt-daemon-config-nwfilter"},
          {"reference": "libvirt-daemon-driver-interface"},
          {"reference": "libvirt-daemon-driver-network"},
          {"reference": "libvirt-daemon-driver-nodedev"},
          {"reference": "libvirt-daemon-driver-nwfilter"},
          {"reference": "libvirt-daemon-driver-qemu"},
          {"reference": "libvirt-daemon-driver-secret"},
          {"reference": "libvirt-daemon-driver-storage"},
          {"reference": "libvirt-daemon-driver-storage-core"},
          {"reference": "libvirt-daemon-driver-storage-disk"},
          {"reference": "libvirt-daemon-driver-storage-gluster"},
          {"reference": "libvirt-daemon-driver-storage-iscsi"},
          {"reference": "libvirt-daemon-driver-storage-iscsi-direct"},
          {"reference": "libvirt-daemon-driver-storage-logical"},
          {"reference": "libvirt-daemon-driver-storage-mpath"},
          {"reference": "libvirt-daemon-driver-storage-rbd"},
          {"reference": "libvirt-daemon-driver-storage-scsi"},
          {"reference": "libvirt-daemon-kvm"},
          {"reference": "libvirt-devel"},
          {"reference": "libvirt-docs"},
          {"reference": "libvirt-libs"},
          {"reference": "libvirt-lock-sanlock"},
          {"reference": "libvirt-nss"},
          {"reference": "libvirt-wireshark"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "libvirt"},
          {"reference": "libvirt-admin"},
          {"reference": "libvirt-bash-completion"},
          {"reference": "libvirt-client"},
          {"reference": "libvirt-daemon"},
          {"reference": "libvirt-daemon-config-network"},
          {"reference": "libvirt-daemon-config-nwfilter"},
          {"reference": "libvirt-daemon-driver-interface"},
          {"reference": "libvirt-daemon-driver-network"},
          {"reference": "libvirt-daemon-driver-nodedev"},
          {"reference": "libvirt-daemon-driver-nwfilter"},
          {"reference": "libvirt-daemon-driver-qemu"},
          {"reference": "libvirt-daemon-driver-secret"},
          {"reference": "libvirt-daemon-driver-storage"},
          {"reference": "libvirt-daemon-driver-storage-core"},
          {"reference": "libvirt-daemon-driver-storage-disk"},
          {"reference": "libvirt-daemon-driver-storage-gluster"},
          {"reference": "libvirt-daemon-driver-storage-iscsi"},
          {"reference": "libvirt-daemon-driver-storage-iscsi-direct"},
          {"reference": "libvirt-daemon-driver-storage-logical"},
          {"reference": "libvirt-daemon-driver-storage-mpath"},
          {"reference": "libvirt-daemon-driver-storage-rbd"},
          {"reference": "libvirt-daemon-driver-storage-scsi"},
          {"reference": "libvirt-daemon-kvm"},
          {"reference": "libvirt-devel"},
          {"reference": "libvirt-docs"},
          {"reference": "libvirt-libs"},
          {"reference": "libvirt-lock-sanlock"},
          {"reference": "libvirt-nss"},
          {"reference": "libvirt-wireshark"}
        ]
      }
    ]
  }
};

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_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}