Vulnerabilities > CVE-2014-6450 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Juniper Junos

047910
CVSS 7.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
network
low complexity
juniper
CWE-119
nessus
NVD
Published: 2015-10-16
Updated: 2016-12-08

Summary

Juniper Junos OS before 11.4R12-S4, 12.1X44 before 12.1X44-D41, 12.1X46 before 12.1X46-D26, 12.1X47 before 12.1X47-D11/D15, 12.2 before 12.2R9, 12.2X50 before 12.2X50-D70, 12.3 before 12.3R8, 12.3X48 before 12.3X48-D10, 12.3X50 before 12.3X50-D42, 13.1 before 13.1R4-S3, 13.1X49 before 13.1X49-D42, 13.1X50 before 13.1X50-D30, 13.2 before 13.2R6, 13.2X51 before 13.2X51-D26, 13.2X52 before 13.2X52-D15, 13.3 before 13.3R3-S3, 14.1 before 14.1R3, 14.2 before 14.2R1, 15.1 before 15.1R1, and 15.1X49 before 15.1X49-D10, when configured for IPv6, allow remote attackers to cause a denial of service (mbuf chain corruption and kernel panic) via crafted IPv6 packets.

Vulnerable Configurations

Part Description Count
OS
Juniper
75

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA10699.NASL
descriptionAccording to its self-reported version number, the remote Juniper Junos device is affected by a denial of service vulnerability due to a flaw related to the processing of IPv6 packets. An unauthenticated, remote attacker can exploit this, via a specially crafted IPv6 packet, to trigger an
last seen2019-10-28
modified2015-10-21
plugin id86476
published2015-10-21
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/86476
titleJuniper Junos IPv6 Packet Handling mbuf Chain Corruption DoS (JSA10699)
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(86476);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2018/08/10");

  script_cve_id("CVE-2014-6450");
  script_bugtraq_id(77125);
  script_xref(name:"JSA", value:"JSA10699");

  script_name(english:"Juniper Junos IPv6 Packet Handling mbuf Chain Corruption DoS (JSA10699)");
  script_summary(english:"Checks the Junos version and configuration.");

  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 denial of service vulnerability due to a
flaw related to the processing of IPv6 packets. An unauthenticated,
remote attacker can exploit this, via a specially crafted IPv6 packet,
to trigger an 'mbuf' chain corruption, resulting in a kernel panic and
a denial of service condition.

Note that this issue only affects devices with IPv6 enabled.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10699");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release or workaround referenced in
Juniper advisory JSA10699.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/10/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/10/21");

  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");

  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');

fixes = make_array();
fixes['11.4'   ] = '11.4R12-S4';  # or 11.4R13
fixes['12.1X44'] = '12.1X44-D41';
fixes['12.1X46'] = '12.1X46-D26';
fixes['12.1X47'] = '12.1X47-D11'; # or 12.1X47-D15
fixes['12.2'   ] = '12.2R9';
fixes['12.2X50'] = '12.2X50-D70';
fixes['12.3'   ] = '12.3R8';
fixes['12.3X48'] = '12.3X48-D10';
fixes['12.3X50'] = '12.3X50-D42';
fixes['13.1'   ] = '13.1R4-S3';   # or 13.1R5
fixes['13.1X49'] = '13.1X49-D42';
fixes['13.1X50'] = '13.1X50-D30';
fixes['13.2'   ] = '13.2R6';
fixes['13.2X51'] = '13.2X51-D26';
fixes['13.2X52'] = '13.2X52-D15';
fixes['13.3'   ] = '13.3R3-S3';   # or 13.1R4
fixes['14.1'   ] = '14.1R3';
fixes['14.2'   ] = '14.2R1';
fixes['15.1'   ] = '15.1R1';
fixes['15.1X49'] = '15.1X49-D10';

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

if(fix == '11.4R12-S4')
  fix += ' or 11.4R13';
if(fix == '12.1X47-D11')
  fix += ' or 12.1X47-D15';
if(fix == '13.1R4-S3')
  fix += ' or 13.1R5';
if(fix == '13.3R3-S3')
  fix += 'or 13.1R4';

# Check if IPv6 is enabled
override = TRUE;
buf = junos_command_kb_item(cmd:"show configuration | display set");
if (buf)
{
  pattern = "^set interfaces .* family inet6 ";
  if (!junos_check_config(buf:buf, pattern:pattern))
    audit(AUDIT_HOST_NOT, 'affected because no interfaces have IPv6 enabled');
  override = FALSE;
}

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

References