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Linux Distros Unpatched Vulnerability : CVE-2017-1000256

🗓️ 04 Mar 2025 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 5 Views

Linux distros have unpatched CVE-2017-1000256 vulnerability affecting libvirt SSL/TLS validation.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ALT Linux		Security fix for the ALT Linux 8 package libvirt version 3.8.0-alt1
30 Oct 201700:00
–altlinux
AlpineLinux		CVE-2017-1000256
31 Oct 201715:00
–alpinelinux
CBLMariner		CVE-2017-1000256 affecting package libvirt 6.1.0-1
9 Sep 202006:09
–cbl_mariner
CNVD		libvirt TLS Certificate Validation Vulnerability
20 Oct 201700:00
–cnvd
CVE		CVE-2017-1000256
31 Oct 201715:00
–cve
Cvelist		CVE-2017-1000256
31 Oct 201715:00
–cvelist
Debian		[SECURITY] [DSA 4003-1] libvirt security update
19 Oct 201719:05
–debian
Debian		[SECURITY] [DSA 4003-1] libvirt security update
19 Oct 201719:05
–debian
Debian CVE		CVE-2017-1000256
31 Oct 201715:00
–debiancve
Tenable Nessus		Debian DSA-4003-1 : libvirt - security update
20 Oct 201700:00
–nessus
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

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  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/04");

  script_cve_id("CVE-2017-1000256");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2017-1000256");

  script_set_attribute(attribute:"synopsis", value:
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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.

  - libvirt version 2.3.0 and later is vulnerable to a bad default configuration of verify-peer=no passed to
    QEMU by libvirt resulting in a failure to validate SSL/TLS certificates by default. (CVE-2017-1000256)

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-2017-1000256");
  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:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/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-2017-1000256");

  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:"2017/10/16");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-config-network");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-core");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-logical");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libvirt-daemon-driver-storage-rbd");
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  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  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-7", "Host/OS/Red Hat Enterprise Linux-5", "Host/OS/Red Hat Enterprise Linux-6", "Host/OS/Red Hat Enterprise Linux-7");

  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 = {
  "Red Hat Enterprise Linux-5": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "5",
        "pkgs": [
          {"reference": "libvirt"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "libvirt"},
          {"reference": "libvirt-client"},
          {"reference": "libvirt-devel"},
          {"reference": "libvirt-lock-sanlock"},
          {"reference": "libvirt-python"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "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-lxc"},
          {"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-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-daemon-lxc"},
          {"reference": "libvirt-devel"},
          {"reference": "libvirt-docs"},
          {"reference": "libvirt-libs"},
          {"reference": "libvirt-lock-sanlock"},
          {"reference": "libvirt-login-shell"},
          {"reference": "libvirt-nss"},
          {"reference": "libvirt-python"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "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-lxc"},
          {"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-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-daemon-lxc"},
          {"reference": "libvirt-devel"},
          {"reference": "libvirt-docs"},
          {"reference": "libvirt-libs"},
          {"reference": "libvirt-lock-sanlock"},
          {"reference": "libvirt-login-shell"},
          {"reference": "libvirt-nss"},
          {"reference": "libvirt-python"}
        ]
      }
    ]
  }
};

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');
}

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04 Sep 2025 00:00Current
7High risk
Vulners AI Score7
CVSS 26.8
CVSS 3.18.1
EPSS0.00772
cve-2017-1000256linuxlibvirtunpatched vulnerabilityssl/tls validation.
5