Juniper Junos SRX Series TCP ALG DoS (JSA10577)

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

include("compat.inc");

if (description)
{
  script_id(68910);
  script_version("1.6");
  script_cvs_date("Date: 2018/07/12 19:01:15");

  script_cve_id("CVE-2013-4687");
  script_bugtraq_id(61122);

  script_name(english:"Juniper Junos SRX Series TCP ALG DoS (JSA10577)");
  script_summary(english:"Checks version, model, 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.  SRX Series devices with
TCP-based Application Layer Gateways (ALGs) can crash when receiving
specially crafted TCP packets.  A remote, unauthenticated attacker could
exploit this to crash the device."
  );
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10577");
  script_set_attribute(
    attribute:"solution",
    value:
"Apply the relevant Junos upgrade referenced in Juniper advisory
JSA10577."
  );
  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_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/model", "Host/Juniper/JUNOS/Version", "Host/Juniper/JUNOS/BuildDate");

  exit(0);
}

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

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

check_model(model:model, flags:SRX_SERIES, exit_on_fail:TRUE);

if (compare_build_dates(build_date, '2013-06-13') >= 0)
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver + ' (build date ' + build_date + ')');
if (ver == '11.4R6-S2')
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver);

fixes['10.4'] = '10.4S14';
fixes['11.4'] = '11.4R7';
fixes['12.1'] = '12.1R6';
fix = check_junos(ver:ver, fixes:fixes);

# 11.2 is listed as affected, but there is no fix listed for it, probably because it's EOL
# versions are numbered based on year, there isn't going to be an 11.20 or anything like that
if (ver =~ "^11\.2")
  fix = 'n/a (11.2 is EOL)';

if (isnull(fix))
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver);

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