Arista EOS DoS Vulnerability (Security Advisory 0025)

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:arista:eos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106495");
  script_version("2026-03-18T05:59:10+0000");
  script_tag(name:"last_modification", value:"2026-03-18 05:59:10 +0000 (Wed, 18 Mar 2026)");
  script_tag(name:"creation_date", value:"2017-01-05 11:09:21 +0700 (Thu, 05 Jan 2017)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-01-07 03:00:00 +0000 (Sat, 07 Jan 2017)");

  script_cve_id("CVE-2016-6894");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Arista EOS DoS Vulnerability (Security Advisory 0025)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_arista_eos_snmp_detect.nasl");
  script_mandatory_keys("arista/eos/detected", "arista/eos/model");

  script_tag(name:"summary", value:"Arista EOS on DCS-7050 series is prone to a denial of service
  vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"By sending crafted packets to the control plane it is possible
  to cause a denial of service condition (device reboot).");

  script_tag(name:"affected", value:"Arista EOS 4.15.2F and later.");

  script_tag(name:"solution", value:"Update to version 4.15.8M, 4.16.7M, 4.17.0F or later.");

  script_xref(name:"URL", value:"https://www.arista.com/en/support/advisories-notices/security-advisories/1752-security-advisory-25");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

model = get_kb_item("arista/eos/model");
if (model !~ "^DCS-7050[STQ]")
  exit(0);

if (!version = get_app_version(cpe: CPE))
  exit(0);

if (version_is_less(version: version, test_version: "4.15.2F"))
  exit(99);

if (version_is_less(version: version, test_version: "4.15.8m")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.15.8M");
  security_message(port: 0, data: report);
  exit(0);
}

if (version =~ "^4\.16") {
  if (version_is_less(version: version, test_version: "4.16.7m")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "4.16.7M");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^4\.17\.0") {
  if (version_is_less(version: version, test_version: "4.17.0f")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "4.17.0F");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);