Juniper Networks Junos OS ICMPv6 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("1.3.6.1.4.1.25623.1.0.106751");
  script_version("2026-04-24T06:23:04+0000");
  script_tag(name:"last_modification", value:"2026-04-24 06:23:04 +0000 (Fri, 24 Apr 2026)");
  script_tag(name:"creation_date", value:"2017-04-13 08:24:49 +0200 (Thu, 13 Apr 2017)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-05-11 01:29:00 +0000 (Fri, 11 May 2018)");

  script_cve_id("CVE-2016-10142");

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

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

  script_name("Juniper Networks Junos OS ICMPv6 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");

  script_tag(name:"summary", value:"Junos OS is prone to a denial of service vulnerability in ICMPv6 PTB
messages.");

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

  script_tag(name:"insight", value:"An issue was discovered in the IPv6 protocol specification, related to
ICMP Packet Too Big (PTB) messages.  The security implications of IP fragmentation have been discussed at length
in various RFCs. An attacker can leverage the generation of IPv6 atomic fragments to trigger the use of
fragmentation in an arbitrary IPv6 flow and can subsequently perform any type of fragmentation-based attack
against legacy IPv6 nodes that do not implement RFC 6946.  However, even nodes that already implement RFC 6946
can be subject to DoS attacks as a result of the generation of IPv6 atomic fragments.

This issue is triggered by ICMPv6 traffic destined to the device.  Transit IPv6 traffic will not cause this issue
to occur, and IPv4 is unaffected by this vulnerability.");

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

  script_tag(name:"affected", value:"Junos OS 12.3X48, 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/JSA10780");

  exit(0);
}

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

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

if (version =~ "^12") {
  if ((revcomp(a: version, b: "12.3X48-D50") < 0) &&
      (revcomp(a: version, b: "12.3X48") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.3X48-D50");
    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: "14.2R7-S6") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.2R7-S6");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^15") {
  if ((revcomp(a: version, b: "15.1F6-S5") < 0) &&
      (revcomp(a: version, b: "15.1F") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1F6-S5");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1R4-S7") < 0) &&
           (revcomp(a: version, b: "15.1R") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1R4-S7");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1X49-D80") < 0) &&
           (revcomp(a: version, b: "15.1X49") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1X49-D80");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^16") {
  if (revcomp(a: version, b: "16.1R3-S3") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "16.1R3-S3");
    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);