ID

VAR-201106-0110

CVE

CVE-2011-2024

TITLE

Cisco Network Registrar Vulnerabilities to gain access to

DESCRIPTION

Cisco Network Registrar before 7.2 has a default administrative password, which makes it easier for remote attackers to obtain access via a TCP session, aka Bug ID CSCsm50627. The problem is Bug ID CSCsm50627 Problem.By a third party, TCP You may gain access through a session. Cisco CNS Network Registrar provides highly scalable and reliable DNS, DHCP and TFTP services. An attacker can exploit this issue to gain unauthorized administrative access to the affected device. Successful exploits will result in the complete compromise of the affected device. This issue is being tracked by Cisco bug ID CSCsm50627. During the initial installation, users are not forced to change this password, allowing it to persist after the installation. The upgrade to Software Release 7.2 is not free; however, a workaround is provided in this document that will prevent exploitation of the vulnerability. When performing an upgrade to Software Release 7.2, you must use the workaround to change the password of the administrative account. The workaround for this vulnerability is to change the password associated with the administrative account using the method described in the "Workarounds" section. This advisory is posted at: http://www.cisco.com/warp/public/707/cisco-sa-20110601-cnr.shtml Affected Products ================= Vulnerable Products +------------------ This vulnerability affects all releases of Cisco Network Registrar prior to Software Release 7.2. The vulnerability is present in the affected releases on all platforms. Alternatively, if using the command-line interface, execute the following command: nrcmd> session get version Products Confirmed Not Vulnerable +-------------------------------- No other Cisco products are currently known to be affected by this vulnerability. This vulnerability is documented in Cisco bug ID CSCsm50627 ( registered customers only) and has been assigned the Common Vulnerabilities and Exposures (CVE) identifier CVE-2011-2024. Additionally, it is a good practice to change passwords periodically. The interval should comply with an organization's security policy but, as a guideline, passwords should be changed two to three times a year. This practice applies equally to all products regardless of when they are installed and to all users, administrators and non-administrators. Vulnerability Scoring Details +---------------------------- Cisco has provided scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0. CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response. Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks. Cisco has provided an FAQ to answer additional questions regarding CVSS at the following link: http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at: http://intellishield.cisco.com/security/alertmanager/cvss * CSCsm50627 - Initially supplied admin password not changed during the installation CVSS Base Score - 10 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - Complete Integrity Impact - Complete Availability Impact - Complete CVSS Temporal Score - 8.3 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation of the vulnerability may allow an attacker to make arbitrary changes to the configuration of Cisco Network Registrar. Software Versions and Fixes =========================== When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution. In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance. This vulnerability is fixed in Software Release 7.2. Workarounds =========== The provided workaround changes the password that is associated with the administrator's account. To change the password using the web interface, select Advanced -> Administrators -> Admin from the menu. Execute the following command to change the administrator's password using the command-line interface: admin <admin-name> enterPassword Additionally, access to Cisco Network Registrar (TCP ports 8080, 8090, 8443, and 8453) and the host on which it is running should be limited to legitimate IP addresses. Consult the documentation of the host operating system for further details how to accomplish this task. The use of IP addresses as a form of authentication is a well-established network security practice. For more guidance on the use of access control lists (ACLs) or the explicit identification of network management stations in devices and applications, reference the white paper A Security-Oriented Approach to IP Addressing at the following link: http://www.cisco.com/web/about/security/intelligence/security-for-ip-addr.html Obtaining Fixed Software ======================== Cisco will not make free upgrade software available for affected customers to address this vulnerability. The workaround provided in this document describes how to change the passwords in current releases of the software. Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html or as otherwise set forth at Cisco.com Downloads at: http://www.cisco.com/public/sw-center/sw-usingswc.shtml Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades. Customers with Service Contracts +------------------------------- Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com. Customers using Third Party Support Organizations +------------------------------------------------ Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory. The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed. Customers without Service Contracts +---------------------------------- Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows. * +1 800 553 2447 (toll free from within North America) * +1 408 526 7209 (toll call from anywhere in the world) * e-mail: tac@cisco.com Customers should have their product serial number available and be prepared to give the URL of this notice. Refer to: http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages. Exploitation and Public Announcements ===================================== The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory. This vulnerability was discovered during an internal review. Status of this Notice: FINAL ============================ THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution ============ This advisory is posted on Cisco's worldwide website at : http://www.cisco.com/warp/public/707/cisco-sa-20110601-cnr.shtml In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients. * cust-security-announce@cisco.com * first-bulletins@lists.first.org * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.grok.org.uk * comp.dcom.sys.cisco@newsgate.cisco.com Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates. Revision History ================ +---------------------------------------+ | Revision | | Initial | | 1.0 | 2001-06-01 | public | | | | release | +---------------------------------------+ Cisco Security Procedures ========================= Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at: http://www.cisco.com/go/psirt +-------------------------------------------------------------------- Copyright 2010-2011 Cisco Systems, Inc. All rights reserved. +-------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (SunOS) iFcDBQFN5XmlQXnnBKKRMNARCJ/mAP0VFqUaxecmVxktLg4c8opYzEEj3VL8+PMl KcRmg+hRDwD/bQYE8gud6mml4vjqdXuSPfS+p36+PLcQv159dlPxUv8= =wSxT -----END PGP SIGNATURE-----

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

trust management

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco

SOURCES

LAST UPDATE DATE

2025-04-11T23:10:50.139000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE