Vulnerabilities > CVE-2015-3006 - Insufficient Entropy vulnerability in Juniper Junos

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
NONE
Availability impact
NONE
network
low complexity
juniper
CWE-331
nessus
NVD
Published: 2020-02-28
Updated: 2020-03-10

Summary

On the QFX3500 and QFX3600 platforms, the number of bytes collected from the RANDOM_INTERRUPT entropy source when the device boots up is insufficient, possibly leading to weak or duplicate SSH keys or self-signed SSL/TLS certificates. Entropy increases after the system has been up and running for some time, but immediately after boot, the entropy is very low. This issue only affects the QFX3500 and QFX3600 switches. No other Juniper Networks products or platforms are affected by this weak entropy vulnerability.

Vulnerable Configurations

Part Description Count
OS
Juniper
14
Hardware
Juniper
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA10678.NASL
descriptionAccording to its self-reported version number, the remote Juniper Junos device is affected by a low entropy vulnerability due to an insufficient number of bytes being collected from the RANDOM_INTERRUPT entropy source when the device is first booted, thus resulting in the generation of weak SSH keys or SSL/TLS certificates.
last seen2020-06-01
modified2020-06-02
plugin id82798
published2015-04-15
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/82798
titleJuniper Junos QFX Low Entropy Vulnerability (JSA10678)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(82798);
  script_version("1.8");
  script_cvs_date("Date: 2018/07/12 19:01:16");

  script_cve_id("CVE-2015-3006");
  script_bugtraq_id(74020);
  script_xref(name:"JSA", value:"JSA10678");

  script_name(english:"Juniper Junos QFX Low Entropy Vulnerability (JSA10678)");
  script_summary(english:"Checks the Junos version and model.");

  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 Juniper
Junos device is affected by a low entropy vulnerability due to an
insufficient number of bytes being collected from the RANDOM_INTERRUPT
entropy source when the device is first booted, thus resulting in the
generation of weak SSH keys or SSL/TLS certificates.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10678");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper
advisory JSA10678.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"2015/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/04/15");

  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) 2015-2018 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.inc");
include("misc_func.inc");

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

if (
  'QFX3500' >!< model &&
  'QFX3600' >!< model
) audit(AUDIT_DEVICE_NOT_VULN, model);

fixes = make_array();
fixes['12.2X50'] = '12.2X50-D70';
fixes['13.1X50'] = '13.1X50-D30';
fixes['13.2X52'] = '13.2X52-D15';
fixes['14.1X53'] = '14.1X53-D10';

if (ver =~ '^13.2X51-')
{
  if (_junos_x_ver_compare(ver, '13.2X51-D25') > 0)
    fixes['13.2X51'] = '13.2X51-D30';
  else
    fixes['13.2X51'] = '13.2X51-D25';
}

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

if (report_verbosity > 0)
{
  report = get_report(ver:ver, fix:fix, model:model);
  security_warning(port:0, extra:report);
}
else security_warning(0);

References