Juniper Junos Flowd TCP/IP Response Packet Handling Remote DoS (JSA10829)

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

include("compat.inc");

if (description)
{
  script_id(106386);
  script_version("1.4");
  script_cvs_date("Date: 2018/07/12 19:01:16");

  script_cve_id("CVE-2018-0002");
  script_xref(name:"JSA", value:"JSA10829");

  script_name(english:"Juniper Junos Flowd TCP/IP Response Packet Handling Remote DoS (JSA10829)");
  script_summary(english:"Checks the Junos version and build date.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the remote Junos device
is affected by a denial of service vulnerability.");
  # https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10829&actp=METADATA
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a1aab40d");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in
Juniper advisory JSA10829.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/26");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Junos Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018 Tenable Network Security, Inc.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version", "Host/Juniper/model");

  exit(0);
}

include("audit.inc");
include("junos_kb_cmd_func.inc");

ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
model = get_kb_item_or_exit('Host/Juniper/model');

if (model !~ '^SRX' && model !~ '^MX')
  audit(AUDIT_HOST_NOT, 'an SRX model or MX model');

# Affected SRX:
# 12.1X46 prior to 12.1X46-D60
# 12.3X48 prior to 12.3X48-D35
# 15.1X49 prior to 15.1X49-D60
#
# Affected MX:
# 14.1 prior to 14.1R9
# 14.2 prior to 14.2R8
# 15.1 prior to 15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R7
# 16.1 versions prior to 16.1R6
# 16.2 versions prior to 16.2R3
# 17.1 versions prior to 17.1R2-S4, 17.1R3

fixes = make_array();
if (model =~ '^SRX')
{
  fixes['12.1X46']  = '12.1X46-D60';
  fixes['12.3X48']  = '12.3X48-D35';
  fixes['15.1X49']  = '15.1X49-D60';
}
else if (model =~ '^MX')
{
  fixes['14.1']   = '14.1R9';
  fixes['14.2']   = '14.2R8';
  if (ver =~ "^15.1R5")
    fixes['15.1'] = '15.1R5-S8';
  else if (ver =~ "^15.1F6")
    fixes['15.1']  = '15.1F6-S9';
  else if (ver =~ "^15\.1R6")
    fixes['15.1'] = '15.1R6-S4';
  else
  fixes['15.1']   = '15.1R7';
  fixes['16.1']   = '16.1R6';
  fixes['16.2']   = '16.2R3';
  if (ver =~ "^17\.1R2")
    fixes['17.1']  = '17.1R2-S4';
  else
    fixes['17.1']   = '17.1R3';
}

fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE);

override = FALSE;

junos_report(ver:ver, fix:fix, override:override, severity:SECURITY_HOLE);