Junos OS: FPC process crashes after J-Flow processes a malformed packet (JSA10914)

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

include('compat.inc');

if (description)
{
  script_id(121126);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/02/09");

  script_cve_id("CVE-2019-0014");
  script_xref(name:"JSA", value:"JSA10914");

  script_name(english:"Junos OS: FPC process crashes after J-Flow processes a malformed packet (JSA10914)");
  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 Juniper
Junos device is affected by a denial of service vulnerability. By 
continuously sending the offending packet, an attacker can repeatedly
crash the FPC process causing a sustained Denial of Service (DoS).
This issue affects both IPv4 and IPv6 packet processing.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10914");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper
advisory JSA10914.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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: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:"cvss_score_source", value:"CVE-2019-0014");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/11");

  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) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include("audit.inc");
include("junos.inc");
include("misc_func.inc");

ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
model = get_kb_item_or_exit('Host/Juniper/model');
# && model !=~ '^PTX'
if ( 'QFX' >!< model && 'PTX' >!< model)
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver);

fixes = make_array();
fixes['17.2X75'] = '17.2X75-D91';
fixes['17.4'] = '17.4R2-S1';
fixes['18.1'] = '18.1R3-S1';
fixes['18.2'] = '18.2R1-S3';

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

if (report_verbosity > 0)
{
  report = get_report(ver:ver, fix:fix);
  security_warning(port:0, extra:report);
}
else security_warning(0);