Juniper Networks Junos OS EX Series DoS Vulnerability

# 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:juniper:junos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106755");
  script_version("2023-07-14T16:09:27+0000");
  script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
  script_tag(name:"creation_date", value:"2017-04-13 08:24:49 +0200 (Thu, 13 Apr 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:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");

  script_cve_id("CVE-2017-2315");

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

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

  script_name("Juniper Networks Junos OS EX Series DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_family("JunOS Local Security Checks");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected", "juniper/junos/model");

  script_tag(name:"summary", value:"Junos OS on EX series is prone to a denial of service vulnerability in
IPv6 processing.");

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

  script_tag(name:"insight", value:"A vulnerability in IPv6 processing has been discovered that may allow a
specially crafted IPv6 Neighbor Discovery (ND) packet destined to an EX Series Ethernet Switches to cause a slow
memory leak. A malicious network-based packet flood of these crafted IPv6 NDP packets may eventually lead to
resource exhaustion and a denial of service.");

  script_tag(name:"impact", value:"An attacker may cause a denial of service condition.");

  script_tag(name:"affected", value:"Junos OS 12.3, 13.3, 14.1, 14.2, 15.1, 16.1 and 16.2");

  script_tag(name:"solution", value:"New builds of Junos OS software are available from Juniper.");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10781");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");

model =  get_kb_item("juniper/junos/model");
if (!model || model !~ '^EX')
  exit(99);

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

if (version =~ "^12") {
  if ((revcomp(a: version, b: "12.3R12-S4") < 0) &&
      (revcomp(a: version, b: "12.3") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.3R12-S4");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^12") {
  if ((revcomp(a: version, b: "13.3R10") < 0) &&
      (revcomp(a: version, b: "12.3") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "13.3R10");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R8-S3") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1R8-S3");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X53-D40") < 0) &&
           (revcomp(a: version, b: "14.1X53") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1X53-D40");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X55-D35") < 0) &&
           (revcomp(a: version, b: "14.1X55") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1X55-D35");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.2R6-S4") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.2R6-S4");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^15") {
  if (revcomp(a: version, b: "15.1R5") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1R5");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^16") {
  if (revcomp(a: version, b: "16.1R3") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "16.1R3");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "16.2R1-S3") < 0) &&
           (revcomp(a: version, b: "16.2") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "16.2R1-S3");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);