Juniper Junos Privilege Escalation Vulnerability (JSA10977)

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

include('compat.inc');

if (description)
{
  script_id(140454);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/20");

  script_cve_id("CVE-2019-0070");
  script_xref(name:"JSA", value:"JSA10977");

  script_name(english:"Juniper Junos Privilege Escalation Vulnerability (JSA10977)");

  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 NFX prior to 18.2R1. 
It is, therefore, affected by a privilege escalation vulnerability as referenced in the 
JSA10977 advisory. 

Note that Nessus has not tested for this issue but has instead relied only on the application's 
self-reported version number.");
  # https://supportportal.juniper.net/s/article/2019-10-Security-Bulletin-Junos-OS-NFX-Series-An-Improper-Input-Validation-weakness-allows-a-malicious-local-attacker-to-elevate-their-permissions-CVE-2019-0070
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d21e23e3");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA10977");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/UI:N/S:C/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-2019-0070");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/09");

  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) 2020-2023 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('junos.inc');

var model = get_kb_item_or_exit('Host/Juniper/model');
if (model !~ "^NFX")
{
  audit(AUDIT_DEVICE_NOT_VULN, model);
}

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

var vuln_ranges = [
  {'min_ver':'OS', 'fixed_ver':'18.2R1', 'model':'^NFX'}
];

var fix = junos_compare_range(target_version:ver, vuln_ranges:vuln_ranges);
if (empty_or_null(fix)) audit(AUDIT_INST_VER_NOT_VULN, 'Junos OS', ver);
var report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);