Vulnerabilities > CVE-2008-1155 - Information Exposure vulnerability in Cisco Network Admission Control

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
cisco
CWE-200
critical
nessus
NVD
Published: 2008-04-16
Updated: 2017-08-08

Summary

Cisco Network Admission Control (NAC) Appliance 3.5.x, 3.6.x before 3.6.4.4, 4.0.x before 4.0.6, and 4.1.x before 4.1.2 allows remote attackers to obtain the shared secret for the Clean Access Server (CAS) and Clean Access Manager (CAM) by sniffing error logs.

Vulnerable Configurations

Part Description Count
Application
Cisco
20

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • 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 familyCISCO
NASL idCISCO-SA-20080416-NAC.NASL
descriptionThe remote Cisco Network Admission Control (NAC) is affected by an information disclosure vulnerability. This vulnerability allows an attacker to obtain a shared secret from the error logs, which are sent over the network. This shared secret is used by Cisco Clean Access Server (CAS) and the Cisco Clean Access Manager (CAM). If an attacker is able to obtain this shared secret, they can gain complete control of the remote device.
last seen2020-06-01
modified2020-06-02
plugin id69949
published2013-09-18
reporterThis script is Copyright (C) 2013-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/69949
titleCisco Network Admission Control Shared Information Disclosure (cisco-sa-20080416-nac)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(69949);
  script_version("1.7");
  script_cvs_date("Date: 2018/11/15 20:50:20");

  script_cve_id("CVE-2008-1155");
  script_bugtraq_id(28807);
  script_xref(name:"CISCO-BUG-ID", value:"CSCsj33976");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20080416-nac");

  script_name(english:"Cisco Network Admission Control Shared Information Disclosure (cisco-sa-20080416-nac)");
  script_summary(english:"Checks the NAC version.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote device is missing a vendor-supplied security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote Cisco Network Admission Control (NAC) is affected by an
information disclosure vulnerability. This vulnerability allows an
attacker to obtain a shared secret from the error logs, which are sent
over the network. This shared secret is used by Cisco Clean Access
Server (CAS) and the Cisco Clean Access Manager (CAM). If an attacker
is able to obtain this shared secret, they can gain complete control
of the remote device."
  );
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20080416-nac
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2e809bc0");
  script_set_attribute(
    attribute:"solution",
    value:
"Apply the relevant patch referenced in Cisco Security Advisory
cisco-sa-20080416-nac."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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_cwe_id(200);

  script_set_attribute(attribute:"vuln_publication_date", value:"2008/04/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2008/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:network_admission_control");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CISCO");

  script_dependencies("cisco_nac_version.nasl");
  script_require_keys("Host/Cisco/NAC/Version");

  exit(0);
}

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

version = get_kb_item_or_exit("Host/Cisco/NAC/Version");

flag = 0;
fixed_version = "";

if (version =~ "^3\.5($|\.)")
{
  flag++;
  fixed_version = "upgrade to 3.6.4.4, 4.0.6, or 4.1.2";
}

if ((version =~ "^3\.6($|\.)") && (ver_compare(ver:version, fix:"3.6.4.4", strict:FALSE) == -1))
{
  flag++;
  fixed_version = "3.6.4.4";
}

if ((version =~ "^4\.0($|\.)") && (ver_compare(ver:version, fix:"4.0.6", strict:FALSE) == -1))
{
  flag++;
  fixed_version = "4.0.6";
}

if ((version =~ "^4\.1($|\.)") && (ver_compare(ver:version, fix:"4.1.2", strict:FALSE) == -1))
{
  flag++;
  fixed_version = "4.1.2";
}

if (flag)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fixed_version;
    security_hole(port:0, extra:report);
  }
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References