Vulnerabilities > CVE-2017-2312 - Missing Release of Resource after Effective Lifetime vulnerability in Juniper Junos

047910
CVSS 6.5 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
juniper
CWE-772
nessus
NVD
Published: 2017-04-24
Updated: 2019-10-03

Summary

On Juniper Networks devices running Junos OS affected versions and with LDP enabled, a specific LDP packet destined to the RE (Routing Engine) will consume a small amount of the memory allocated for the rpd (routing protocol daemon) process. Over time, repeatedly receiving this type of LDP packet(s) will cause the memory to exhaust and the rpd process to crash and restart. It is not possible to free up the memory that has been consumed without restarting the rpd process. This issue affects Junos OS based devices with either IPv4 or IPv6 LDP enabled via the [protocols ldp] configuration (the native IPv6 support for LDP is available in Junos OS 16.1 and higher). The interface on which the packet arrives needs to have LDP enabled. The affected Junos versions are: 13.3 prior to 13.3R10; 14.1 prior to 14.1R8; 14.2 prior to 14.2R7-S6 or 14.2R8; 15.1 prior to 15.1F2-S14, 15.1F6-S4, 15.1F7, 15.1R4-S7, 15.1R5; 15.1X49 before 15.1X49-D70; 15.1X53 before 15.1X53-D230, 15.1X53-D63, 15.1X53-D70; 16.1 before 16.1R2. 16.2R1 and all subsequent releases have a resolution for this vulnerability.

Vulnerable Configurations

Part Description Count
OS
Juniper
58

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • HTTP DoS
    An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA10777.NASL
descriptionAccording to its self-reported version and configuration, the remote Juniper Junos device is affected by a memory leak issue in the routing protocol daemon (rpd) when handling a specific LDP packet, which over time will consume memory that cannot be freed without restarting the rpd process. An authenticated, adjacent attacker can exploit this, by repeatedly using this kind of packet, to cause the rpd process to crash and reload, resulting in a denial of service condition. Note that this issue affects devices with either IPv4 or IPv6 LDP enabled via the
last seen2020-03-18
modified2017-04-20
plugin id99524
published2017-04-20
reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/99524
titleJuniper Junos Routing Protocol Daemon LDP Packet DoS (JSA10777)
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99524);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2018/08/10");

  script_cve_id("CVE-2017-2312");
  script_bugtraq_id(97611);
  script_xref(name:"JSA", value:"JSA10777");

  script_name(english:"Juniper Junos Routing Protocol Daemon LDP Packet DoS (JSA10777)");
  script_summary(english:"Checks the Junos version and configuration.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version and configuration, the remote
Juniper Junos device is affected by a memory leak issue in the routing
protocol daemon (rpd) when handling a specific LDP packet, which over
time will consume memory that cannot be freed without restarting the
rpd process. An authenticated, adjacent attacker can exploit this, by
repeatedly using this kind of packet, to cause the rpd process to
crash and reload, resulting in a denial of service condition. Note
that this issue affects devices with either IPv4 or IPv6 LDP enabled
via the '[protocols ldp]' configuration. Furthermore, the interface on
which the packet arrives needs to have LDP enabled.

Nessus has not tested for this issue but has instead relied only on
the device's self-reported version and current configuration.");
  # https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10777&actp=METADATA
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1fa1895d");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release or workaround referenced in
Juniper advisory JSA10777.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:S/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/20");

  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) 2017-2018 Tenable Network Security, Inc.");

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

  exit(0);
}

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

ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
# Workaround is available
if (report_paranoia < 2) audit(AUDIT_PARANOID);

fixes = make_array();

fixes['13.3'] = '13.3R10';
fixes['14.1'] = '14.1R8';
fixes['14.2R7'] = '14.2R7-S6';
fixes['14.2'] = '14.2R8';
fixes['15.1F2'] = '15.1F2-S14';
fixes['15.1F6'] = '15.1F6-S4';
fixes['15.1F'] = '15.1F7';
fixes['15.1R4'] = '15.1R4-S7';
fixes['15.1R'] = '15.1R5';
fixes['15.1X49'] = '15.1X49-D70';
fixes['15.1X53'] = '15.1X53-D63'; # or 15.1X53-D70 or 15.1X53-D230
fixes['16.1'] = '16.1R2';
fixes['16.2'] = '16.2R1';

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

override = TRUE;
buf = junos_command_kb_item(cmd:"show ldp statistics");
if (buf)
{
  if (preg(string:buf, pattern:"LDP.* instance is not running", icase:TRUE, multiline:TRUE))
    audit(AUDIT_HOST_NOT, "affected because LDP is not enabled"); 
  else
    override = FALSE;
}

junos_report(ver:ver, fix:fix, override:override, severity:SECURITY_WARNING);

References