Vulnerabilities > CVE-2019-0036 - Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper Junos

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
juniper
CWE-754
critical
nessus
NVD
Published: 2019-04-10
Updated: 2021-02-05

Summary

When configuring a stateless firewall filter in Junos OS, terms named using the format "internal-n" (e.g. "internal-1", "internal-2", etc.) are silently ignored. No warning is issued during configuration, and the config is committed without error, but the filter criteria will match all packets leading to unexpected results. Affected releases are Juniper Networks Junos OS: All versions prior to and including 12.3; 14.1X53 versions prior to 14.1X53-D130, 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D161, 15.1X49-D170; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D496, 15.1X53-D69; 16.1 versions prior to 16.1R7-S4, 16.1R7-S5; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S4; 17.4 versions prior to 17.4R1-S7, 17.4R2-S3; 18.1 versions prior to 18.1R2-S4, 18.1R3-S4; 18.2 versions prior to 18.2R1-S5, 18.2R2-S1; 18.2X75 versions prior to 18.2X75-D40; 18.3 versions prior to 18.3R1-S3; 18.4 versions prior to 18.4R1-S1, 18.4R1-S2.

Vulnerable Configurations

Part Description Count
OS
Juniper
248

Common Weakness Enumeration (CWE)

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA10925.NASL
descriptionThe version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the JSA10925 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application
last seen2020-06-01
modified2020-06-02
plugin id124031
published2019-04-15
reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/124031
titleJuniper JSA10925
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(124031);
  script_version("1.2");
  script_cvs_date("Date: 2019/08/20  6:39:51");

  script_cve_id("CVE-2019-0036");

  script_name(english:"Juniper JSA10925");
  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:
"The version of tested product installed on the remote host is prior to
tested version. It is, therefore, affected by a vulnerability as
referenced in the JSA10925 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/KB16613");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/KB16765");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/KB16446");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper
advisory JSA10925");

  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0036");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/15");

  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) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version");

  exit(0);
}

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

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

if (ver !~ '14.1X53-D49') # not vuln but in same 14.1X53 series
  fixes['14.1X53'] = '14.1X53-D130';

fixes['15.1F'] = '15.1F6-S12';
fixes['15.1R'] = '15.1R7-S4';
fixes['15.1X49'] = '15.1X49-D161'; # or 15.1X49-D170
fixes['15.1X53'] = '15.1X53-D236'; # or 15.1X53-D496
fixes['16.1'] = '16.1R7-S4';
fixes['16.2'] = '16.2R2-S9';
fixes['17.1'] = '17.1R3';

if (ver =~ "^17\.2R1")
  fixes['17.2R'] = '17.2R1-S8';
else
  fixes['17.2R'] = '17.2R4-S1';

fixes['17.3'] = '17.3R3-S4';
fixes['17.4'] = '17.4R1-S7';

if (ver =~ "^18\.1R2")
  fixes['18.1R'] = '18.1R2-S4';
else
  fixes['18.1R'] = '18.1R3-S4';

if (ver =~ "^18\.2R1")
  fixes['18.2'] = '18.2R1-S5';
else
  fixes['18.2'] = '18.2R2-S1';

fixes['18.2X75'] = '18.2X75-D40';
fixes['18.3'] = '18.3R1-S3';
fixes['18.4'] = '18.4R1-S1';
fixes['19.1'] = '19.1R1';

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);

References