Vulnerabilities > CVE-2019-0041 - Unspecified vulnerability in Juniper Junos 18.2

047910
CVSS 8.6 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
juniper
nessus
NVD
Published: 2019-04-10
Updated: 2024-11-21

Summary

On EX4300-MP Series devices with any lo0 filters applied, transit network traffic may reach the control plane via loopback interface (lo0). The device may fail to forward such traffic. This issue affects Juniper Networks Junos OS 18.2 versions prior to 18.2R1-S2, 18.2R2 on EX4300-MP Series. This issue does not affect any other EX series devices.

Vulnerable Configurations

Part Description Count
OS
Juniper
2
Hardware
Juniper
1

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA10933.NASL
descriptionThe version of tested product installed on the remote host is 18.2 prior to 18.2R1-S2, 18.2R2 on an EX4300-MP Series device with any lo0 filters applied. It is, therefore, affected by a vulnerability. The transit network traffic may reach the control plane via loopback interface (lo0). The device may fail to forward such traffic as referenced in the JSA10933 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application
last seen2020-06-10
modified2019-06-07
plugin id125774
published2019-06-07
reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/125774
titleJuniper JSA10933
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(125774);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/09");

  script_cve_id("CVE-2019-0041");

  script_name(english:"Juniper JSA10933");
  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 18.2 prior to
18.2R1-S2, 18.2R2 on an EX4300-MP Series device with any lo0 filters applied. 
It is, therefore, affected by a vulnerability. The transit network traffic may 
reach the control plane via loopback interface (lo0). The device may fail to 
forward such traffic as referenced in the JSA10933 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/JSA10933");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper
advisory JSA10933");

  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0041");

  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:"2019/06/07");

  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) 2019-2020 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');
fixes = make_array();

model = get_kb_item_or_exit('Host/Juniper/model');

#EX4300-MP Series only
if ( 'EX4300-MP' >!< model)
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver);

fixes["18.2"] = "18.2R1-S2";

fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE);
report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);

References