Junos OS Default Credentials Vulnerability (JSA10998)

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

include('compat.inc');

if (description)
{
  script_id(135683);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/14");

  script_cve_id("CVE-2020-1615");
  script_xref(name:"JSA", value:"JSA10998");
  script_xref(name:"IAVA", value:"2020-A-0162-S");

  script_name(english:"Junos OS Default Credentials Vulnerability (JSA10998)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of Junos OS installed on the remote host is vMX prior to 17.1R2-S11, 17.2R3-S3, 17.3R2-S5, 17.4R2-S9, 18.1R3-S9,
18.2R2-S7, 18.2X75-D420, 18.3R1-S7, 18.4R1-S5, 19.1R1-S4, 19.2R1-S3, or 19.3R1-S1. It is, therefore, affected by a
vulnerability which allows an unauthenticated remote attacker to exploit default credentials stored in vMX configuration and
access the vMX instance without authorization as referenced in the JSA10998 advisory. 

Note that Nessus has not tested for this issue but has instead
relied only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/JSA10998");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA10998");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/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:H/I:H/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-2020-1615");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/16");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Junos Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020 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');
fixes = make_array();

if (model =~ "^vMX")
{
  fixes['17.1'] = '17.1R2-S11';
  fixes['17.2'] = '17.2R3-S3';
  fixes['17.3'] = '17.3R2-S5';
  fixes['17.4'] = '17.4R2-S9';
  fixes['18.1'] = '18.1R3-S9';
  fixes['18.2'] = '18.2R2-S7';
  fixes['18.2X75'] = '18.2X75-D420';
  fixes['18.3'] = '18.3R1-S7';
  fixes['18.4'] = '18.4R1-S5';
  fixes['19.1'] = '19.1R1-S4';
  fixes['19.2'] = '19.2R1-S3';
  fixes['19.3'] = '19.3R1-S1';
}
fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE);
report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);