Juniper Junos HTTPS Server Certificate AV Vulnerability (JSA10822)

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

include("compat.inc");

if (description)
{
  script_id(104041);
  script_version("1.5");
  script_cvs_date("Date: 2018/07/13 15:08:46");

  script_cve_id("CVE-2017-10620");
  script_xref(name:"JSA", value:"JSA10822");

  script_name(english:"Juniper Junos HTTPS Server Certificate AV Vulnerability (JSA10822)");
  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 vulnerability in that the HTTPS server certificate is 
not verified before downloading anti-virus updates.");
  # https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10822&actp=METADATA
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8997bb76");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in
Juniper advisory JSA10822.");
  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:"2017/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/20");

  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) 2017-2018 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')
  audit(AUDIT_HOST_NOT, 'an SRX model');

# Affected:
# 12.1X46 prior to 12.1X46-D71
# 12.3X48 prior to 12.3X48-D55
# 15.1X49 prior to 15.1X49-D110
fixes = make_array();
fixes['12.1X46']  = '12.1X46-D71';
fixes['12.3X48']  = '12.3X48-D55';
fixes['15.1X49']  = '15.1X49-D110';

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

override = FALSE;

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