Vulnerabilities > CVE-2014-2108 - Improper Input Validation vulnerability in Cisco IOS and IOS XE

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
cisco
CWE-20
nessus
NVD
Published: 2014-03-27
Updated: 2014-03-28

Summary

Cisco IOS 12.2 and 15.0 through 15.3 and IOS XE 3.2 through 3.7 before 3.7.5S and 3.8 through 3.10 before 3.10.1S allow remote attackers to cause a denial of service (device reload) via a malformed IKEv2 packet, aka Bug ID CSCui88426.

Vulnerable Configurations

Part Description Count
OS
Cisco
67

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyCISCO
    NASL idCISCO-SA-20140326-IKEV2.NASL
    descriptionAccording to its self-reported version, the version of Cisco IOS running on the remote host is affected by a denial of service vulnerability in the Internet Key Exchange Version 2 (IKEv2) module. An unauthenticated, remote attacker could potentially exploit this issue by sending a malformed IKEv2 packet resulting in a denial of service. Note that this issue only affects hosts when Internet Security Association and Key Management Protocol (ISAKMP) is enabled.
    last seen2020-06-01
    modified2020-06-02
    plugin id73341
    published2014-04-04
    reporterThis script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/73341
    titleCisco IOS Software Internet Key Exchange Version 2 (IKEv2) Denial of Service (cisco-sa-20140326-ikev2)
    code
    #TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(73341);
  script_version("1.18");
  script_cvs_date("Date: 2019/11/26");

  script_cve_id("CVE-2014-2108");
  script_bugtraq_id(66471);
  script_xref(name:"CISCO-BUG-ID", value:"CSCui88426");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20140326-ikev2");

  script_name(english:"Cisco IOS Software Internet Key Exchange Version 2 (IKEv2) Denial of Service (cisco-sa-20140326-ikev2)");
  script_summary(english:"Checks the IOS version.");

  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, the version of Cisco IOS
running on the remote host is affected by a denial of service
vulnerability in the Internet Key Exchange Version 2 (IKEv2) module.
An unauthenticated, remote attacker could potentially exploit this
issue by sending a malformed IKEv2 packet resulting in a denial of
service.

Note that this issue only affects hosts when Internet Security
Association and Key Management Protocol (ISAKMP) is enabled.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-ikev2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ec115086");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/security/center/viewAlert.x?alertId=33346");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in Cisco Security Advisory
cisco-sa-20140326-ikev2.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:"2014/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_ios_version.nasl");
  script_require_keys("Host/Cisco/IOS/Version");

  exit(0);
}


include("audit.inc");
include("cisco_func.inc");
include("cisco_kb_cmd_func.inc");

flag = 0;
override = 0;
report = "";
cbi = "CSCui88426";
fixed_ver = "";

ver = get_kb_item_or_exit("Host/Cisco/IOS/Version");

# 15.0ED
if (ver == '15.0(2)ED' || ver == '15.0(2)ED1')
         fixed_ver = '15.2(1)E2';
# 15.0EH
else if (ver == '15.0(2)EH')
         fixed_ver = '15.2(1)E2';
# 15.0EJ
else if (ver == '15.0(2)EJ')
         fixed_ver = '15.0(2)EJ1';
# 15.0EX
else if (ver == '15.0(2)EX' || ver == '15.0(2)EX1' || ver == '15.0(2)EX3' || ver == '15.0(2)EX4')
         fixed_ver = 'Refer to the vendor for a fix.';
# 15.0EY
else if (ver == '15.0(2)EY' || ver == '15.0(2)EY1' || ver == '15.0(2)EY3')
         fixed_ver = '15.2(1)E2';
# 15.0EZ
else if (ver == '15.0(2)EZ')
         fixed_ver = '15.0(2)SE6';
# 15.0SE
else if (ver == '15.0(2)SE' || ver == '15.0(2)SE1' || ver == '15.0(2)SE2' || ver == '15.0(2)SE3' || ver == '15.0(2)SE4' || ver == '15.0(2)SE5')
         fixed_ver = '15.0(2)SE6';
# 15.1GC
else if (ver == '15.1(2)GC' || ver == '15.1(2)GC1' || ver == '15.1(2)GC2' || ver == '15.1(4)GC' || ver == '15.1(4)GC1' || ver == '15.1(4)GC2')
         fixed_ver = '15.2(4)GC1';
# 15.1M
else if (ver == '15.1(4)M' || ver == '15.1(4)M0a' || ver == '15.1(4)M0b' || ver == '15.1(4)M1' || ver == '15.1(4)M2' || ver == '15.1(4)M3' || ver == '15.1(4)M3a' || ver == '15.1(4)M4' || ver == '15.1(4)M5' || ver == '15.1(4)M6' || ver == '15.1(4)M7')
         fixed_ver = '15.1(4)M8';
# 15.1MR
else if (ver == '15.1(1)MR' || ver == '15.1(1)MR1' || ver == '15.1(1)MR2' || ver == '15.1(1)MR3' || ver == '15.1(1)MR4' || ver == '15.1(1)MR5' || ver == '15.1(1)MR6' || ver == '15.1(3)MR')
         fixed_ver = 'Refer to the vendor for a fix.';
# 15.1MRA
else if (ver == '15.1(3)MRA' || ver == '15.1(3)MRA1' || ver == '15.1(3)MRA2')
         fixed_ver = '15.1(3)MRA3';
# 15.1S
else if (ver == '15.1(1)S' || ver == '15.1(1)S1' || ver == '15.1(1)S2' || ver == '15.1(2)S' || ver == '15.1(2)S1' || ver == '15.1(2)S2' || ver == '15.1(3)S' || ver == '15.1(3)S0a' || ver == '15.1(3)S1' || ver == '15.1(3)S2' || ver == '15.1(3)S3' || ver == '15.1(3)S4' || ver == '15.1(3)S5' || ver == '15.1(3)S5a' || ver == '15.1(3)S6')
         fixed_ver = '15.2(2)S0a or 15.2(4)S5';
# 15.1SG
else if (ver == '15.1(1)SG' || ver == '15.1(1)SG1' || ver == '15.1(1)SG2' || ver == '15.1(2)SG' || ver == '15.1(2)SG1' || ver == '15.1(2)SG2' || ver == '15.1(2)SG3')
         fixed_ver = '15.1(2)SG4';
# 15.1SNG
else if (ver == '15.1(2)SNG')
         fixed_ver = 'Refer to the vendor for a fix.';
# 15.1SNH
else if (ver == '15.1(2)SNH' || ver == '15.1(2)SNH1')
         fixed_ver = 'Refer to the vendor for a fix.';
# 15.1SNI
else if (ver == '15.1(2)SNI' || ver == '15.1(2)SNI1')
         fixed_ver = 'Refer to the vendor for a fix.';
# 15.1SY
else if (ver == '15.1(1)SY' || ver == '15.1(1)SY1' || ver == '15.1(1)SY2' || ver == '15.1(2)SY' || ver == '15.1(2)SY1')
         fixed_ver = '15.1(1)SY3 or 15.1(2)SY2';
# 15.1T
else if (ver == '15.1(1)T' || ver == '15.1(1)T1' || ver == '15.1(1)T2' || ver == '15.1(1)T3' || ver == '15.1(1)T4' || ver == '15.1(1)T5' || ver == '15.1(2)T' || ver == '15.1(2)T0a' || ver == '15.1(2)T1' || ver == '15.1(2)T2' || ver == '15.1(2)T2a' || ver == '15.1(2)T3' || ver == '15.1(2)T4' || ver == '15.1(2)T5' || ver == '15.1(3)T' || ver == '15.1(3)T1' || ver == '15.1(3)T2' || ver == '15.1(3)T3' || ver == '15.1(3)T4')
         fixed_ver = '15.1(4)M8';
# 15.1XB - no fix specified
else if (ver == '15.1(1)XB1' || ver == '15.1(1)XB2' || ver == '15.1(1)XB3' || ver == '15.1(4)XB4' || ver == '15.1(4)XB5' || ver == '15.1(4)XB5a' || ver == '15.1(4)XB6' || ver == '15.1(4)XB7' || ver == '15.1(4)XB8' || ver == '15.1(4)XB8a')
       fixed_ver = 'Refer to the vendor for a fix.';
# 15.2E
else if (ver == '15.2(1)E' || ver == '15.2(1)E1')
        fixed_ver = '15.2(1)E2';
# 15.2EY
else if (ver == '15.2(1)EY')
        fixed_ver = '15.2(1)E2';
# 15.2GC
else if (ver == '15.2(1)GC' || ver == '15.2(1)GC1' || ver == '15.2(1)GC2' || ver == '15.2(2)GC' || ver == '15.2(3)GC' || ver == '15.2(3)GC1' || ver == '15.2(4)GC')
        fixed_ver = '15.2(4)GC1';
# 15.2GCA - no fix specified
else if (ver == '15.2(3)GCA' || ver == '15.2(3)GCA1')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.2M
else if (ver == '15.2(4)M' || ver == '15.2(4)M1' || ver == '15.2(4)M2' || ver == '15.2(4)M3' || ver == '15.2(4)M4' || ver == '15.2(4)M5')
        fixed_ver = '15.2(4)M6';
# 15.2S
else if (ver == '15.2(1)S' || ver == '15.2(1)S1' || ver == '15.2(1)S2' || ver == '15.2(2)S' || ver == '15.2(2)S1' || ver == '15.2(2)S2' || ver == '15.2(4)S' || ver == '15.2(4)S1' || ver == '15.2(4)S2' || ver == '15.2(4)S3' || ver == '15.2(4)S3a' || ver == '15.2(4)S4' || ver == '15.2(4)S4a')
        fixed_ver = '15.2(2)S0a or 15.2(4)S5';
# 15.2SNG
else if (ver == '15.2(2)SNG')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.2SNH
else if (ver == '15.2(2)SNH' || ver == '15.2(2)SNH1')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.2SNI
else if (ver == '15.2(2)SNI')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.2T
else if (ver == '15.2(1)T' || ver == '15.2(1)T1' || ver == '15.2(1)T2' || ver == '15.2(1)T3' || ver == '15.2(1)T3a' || ver == '15.2(1)T4' || ver == '15.2(2)T' || ver == '15.2(2)T1' || ver == '15.2(2)T2' || ver == '15.2(2)T3' || ver == '15.2(2)T4' || ver == '15.2(3)T' || ver == '15.2(3)T1' ||   ver == '15.2(3)T2' || ver == '15.2(3)T3' || ver == '15.2(3)T4')
        fixed_ver = '15.2(4)M6';
# 15.2XA - no fix specified
else if (ver == '15.2(3)XA')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.2XB - no fix specified
else if (ver == '15.2(4)XB10')
        fixed_ver = 'Refer to the vendor for a fix.';
# 15.3M
else if (ver == '15.3(3)M')
        fixed_ver = '15.3(3)M1';
# 15.3S
else if (ver == '15.3(1)S' || ver == '15.3(1)S1' || ver == '15.3(1)S2' || ver == '15.3(2)S' || ver == '15.3(2)S0a' || ver == '15.3(2)S0xa' || ver == '15.3(2)S1' || ver == '15.3(2)S2' || ver == '15.3(3)S')
        fixed_ver = '15.3(3)S1';

if (fixed_ver) flag++;

if (flag && get_kb_item("Host/local_checks_enabled"))
{
  flag = 0;

  buf = cisco_command_kb_item("Host/Cisco/Config/show_running-config", "show running-config");
  if (check_cisco_result(buf))
  {
    if (preg(multiline:TRUE, pattern:"^crypto map", string:buf)) { flag = 1; }
    if (preg(multiline:TRUE, pattern:"^tunnel protection ipsec", string:buf)) { flag = 1; }
  } else if (cisco_needs_enable(buf)) { flag = 1; override = 1; }
}

if (flag)
{
  report +=
    '\n  Cisco Bug ID        : ' + cbi +
    '\n    Installed release : ' + ver +
    '\n    Fixed release     : ' + fixed_ver + '\n';
  security_hole(port:0, extra:report + cisco_caveat(override));
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyCISCO
    NASL idCISCO-SA-20140326-IKEV2-IOSXE.NASL
    descriptionAccording to its self-reported version, the version of Cisco IOS XE running on the remote host is affected by a denial of service vulnerability in the Internet Key Exchange Version 2 (IKEv2) module. An unauthenticated, remote attacker could potentially exploit this issue by sending a malformed IKEv2 packet resulting in a denial of service. Note that this issue only affects hosts when Internet Security Association and Key Management Protocol (ISAKMP) is enabled.
    last seen2019-10-28
    modified2014-04-04
    plugin id73340
    published2014-04-04
    reporterThis script is Copyright (C) 2014-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/73340
    titleCisco IOS XE Software Internet Key Exchange Version 2 (IKEv2) Denial of Service (cisco-sa-20140326-ikev2)

Seebug

bulletinFamilyexploit
descriptionCVE(CAN) ID: CVE-2014-2108 Cisco IOS是多数思科系统路由器和网络交换机上使用的互联网络操作系统。 Cisco IOS 12.2、15.0-15.3、IOS XE 3.2-3.7、3.8-3.10版本存在安全漏洞，远程攻击者通过特制的IKEv2数据包，利用此漏洞可造成拒绝服务（内存耗尽）。 0 Cisco IOS 15.x Cisco IOS 12.2 Cisco已经为此发布了一个安全公告（cisco-sa-20140326-ikev2）以及相应补丁: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-ikev2
idSSV:61981
last seen2017-11-19
modified2014-03-28
published2014-03-28
reporterRoot
titleCisco IOS Software IK3v2模块拒绝服务漏洞

References