Juniper ScreenOS 6.3.x < 6.3.0r24 SSL Death Alert (JSA10808)

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

include("compat.inc");

if (description)
{
  script_id(103925);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2016-8610");
  script_bugtraq_id(93841);
  script_xref(name:"JSA", value:"JSA10808");

  script_name(english:"Juniper ScreenOS 6.3.x < 6.3.0r24 SSL Death Alert (JSA10808)");
  script_summary(english:"Checks the version of ScreenOS.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a TLS/SSL vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Juniper ScreenOS running on the remote host is 6.3.x
prior to 6.3.0r24. It is, therefore, affected by a vulnerability 
in the way the TLS/SSL protocol specifies processing of ALERT 
packets during a connection handshake.

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  # https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10808&actp=METADATA
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b1944f42");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Juniper ScreenOS version 6.3.0r24 or later. Alternatively,
apply the workaround referenced in the vendor's advisory.");
  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-2016-8610");

  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:"2017/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:screenos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("screenos_version.nbin", "screenos_unsupported.nasl");
  script_require_keys("Host/Juniper/ScreenOS/display_version", "Host/Juniper/ScreenOS/version");
  script_exclude_keys("Host/Juniper/ScreenOS/unsupported");

  exit(0);
}

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

app_name = "Juniper ScreenOS";
display_version = get_kb_item_or_exit("Host/Juniper/ScreenOS/display_version");
version = get_kb_item_or_exit("Host/Juniper/ScreenOS/version");
if (get_kb_item("Host/Juniper/ScreenOS/unsupported"))
  exit(0, app_name + " version " + display_version + " is installed and no longer supported, therefore, it was not checked."); 

# prior to 6.3.0r24 are affected. 6.2 and prior are unsupported
# fix is 6.3.0r24 and later
if (ver_compare(ver:version, minver:"6.3.0.0", fix:"6.3.0.24", strict:FALSE) < 0)
{
  display_fix = "6.3.0r24";

  port = 0;
  report =
    '\n  Installed version : ' + display_version +
    '\n  Fixed version     : ' + display_fix +
    '\n';

  security_report_v4(port:port, extra:report, severity:SECURITY_WARNING);
}
else audit(AUDIT_INST_VER_NOT_VULN, app_name, display_version);