Juniper Junos proxy-arp/arp-resp DoS (JSA10576)

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

include("compat.inc");

if (description)
{
  script_id(68909);
  script_version("1.6");
  script_cvs_date("Date: 2018/07/12 19:01:15");

  script_cve_id("CVE-2013-4686");
  script_bugtraq_id(61126);

  script_name(english:"Juniper Junos proxy-arp/arp-resp DoS (JSA10576)");
  script_summary(english:"Checks 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
has a denial of service vulnerability.  Specially crafted ARP requests
can result in a crash when a 'family inet' interface is configured as
follows :

  - Uses a VLAN interface with an unnumbered address
    based on lo0

  - lo0 is configured with a non-/32 address

  - Both 'proxy-arp unrestricted' and 'arp-resp unrestricted'
    are enabled"
  );
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10576");
  script_set_attribute(
    attribute:"solution",
    value:
"Apply the relevant Junos upgrade referenced in Juniper advisory
JSA10576."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"2013/07/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/07/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/16");

  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) 2013-2018 Tenable Network Security, Inc.");

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

  exit(0);
}

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


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

if (compare_build_dates(build_date, '2013-06-09') >= 0)
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver + ' (build date ' + build_date + ')');

fixes['10.4'] = '10.4R14';
fixes['11.4'] = '11.4R8';
fixes['11.4X'] = '11.4X27.43';
fixes['12.1X44'] = '12.1X44-D20';
fixes['12.1'] = '12.1R6';
fixes['12.2'] = '12.2R4';
fixes['12.3'] = '12.3R2';
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);