===================================================================== CERT-Renater Note d'Information No. 2006/VULN360 _____________________________________________________________________ DATE : 29/06/2006 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running Cisco Wireless Control System. ====================================================================== Cisco Security Advisory: Multiple Vulnerabilities in Wireless Control System Advisory ID: cisco-sa-20060628-wcs http://www.cisco.com/warp/public/707/cisco-sa-20060628-wcs.shtml Revision 1.0 For Public Release 2006 June 28 1600 UTC (GMT) - --------------------------------------------------------------------- Contents ======== Summary Affected Products Details Impact Software Versions and Fixes Workarounds Obtaining Fixed Software Customers with Service Contracts Customers using Third Party Support Organizations Customers without Service Contracts Exploitation and Public Announcements Status of this Notice: FINAL Distribution Revision History Cisco Security Procedures - --------------------------------------------------------------------- Summary ======= Cisco Wireless Control System (WCS) contains multiple vulnerabilities which may allow a remote user to: * access sensitive configuration information about access points managed by WCS * read from and write to arbitrary files on a WCS system * log in to a WCS system with a default administrator password * execute script code in a WCS user's web browser * access directories which may reveal sensitive WCS configuration information There are workarounds for several, but not all, of these vulnerabilities. See the Workarounds section for more information. Cisco has made free software available to address these vulnerabilities for affected customers. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20060628-wcs.shtml. Affected Products ================= Vulnerable Products +------------------ +---------------------------------------+ | DDTS | Affected Releases | |------------+--------------------------| | | WCS for Linux and | | CSCsd15955 | Windows 3.2(40) and | | | earlier | |------------+--------------------------| | | WCS for Linux and | | CSCsd15951 | Windows 3.2(51) and | | | earlier | |------------+--------------------------| | | WCS for Linux and | | CSCse21391 | Windows 4.0(1) and | | | earlier | |------------+--------------------------| | | WCS for Linux and | | CSCsd71397 | Windows 3.2(51) and | | | earlier | |------------+--------------------------| | | WCS for Linux and | | CSCse01127 | Windows 3.2(51) and | | | earlier | |------------+--------------------------| | | WCS for Linux and | | CSCse01409 | Windows 3.2(51) and | | | earlier | +---------------------------------------+ The version of WCS software installed on a particular device can be found via the WCS HTTP management interface. Select Help -> About the Software to obtain the software version. Products Confirmed Not Vulnerable +-------------------------------- No other Cisco products are currently known to be affected by these vulnerabilities. Details ======= Wireless Control System is a centralized, systems-level application for managing and controlling lightweight access points and wireless LAN controllers for the Cisco Unified Wireless Network. WCS contains multiple vulnerabilities including information disclosure and privilege escalation issues. The issues are detailed below: * CSCsd15955-Remote users can connect to the WCS internal database with an undocumented username and hard-coded password, gaining access to the sensitive configuration information of managed wireless access points. * CSCsd15951-The undocumented database username and password are present in several WCS files in clear text. * CSCse21391-WCS installations contain the default administrator username root with a default password of public. The password is not required to be changed during installation or upon the initial login. There is a workaround for this vulnerability. * CSCsd71397-A remote user can read from or write to arbitrary locations in the filesystem of a WCS system via the internal TFTP server. This problem only occurs if the directory path chosen by the user during the installation of WCS for the root of the internal TFTP server contains a space character. There is a workaround for this vulnerability. * CSCse01127-The login page for the WCS HTTP interface fails to properly sanitize user-supplied data for malicious script code. This may result in the ability for an attacker to entice a user to access a malicious URL which executes arbitrary script code in the user's web browser. * CSCse01409-The WCS HTTP server does not properly secure certain directories, potentially allowing access to sensitive information like WCS usernames and directory paths. These issues are documented by the following Cisco bug IDs: * CSCsd15955 ( registered customers only) -WCS DBserver is remotely accessible using Solid SQL and static password * CSCsd15951 ( registered customers only) -Database passwords are written in clear text on the program folders * CSCse21391 ( registered customers only) -WCS ships with default administrator account and password * CSCsd71397 ( registered customers only) -WCS tftp read/writes to C:\ if given dir has a space * CSCse01127 ( registered customers only) -Possible CSS attack on login page of WCS * CSCse01409 ( registered customers only) -WCS allows unauthenticated access to user list and html files on server Impact ====== Successful exploitation of the vulnerabilities presented in this advisory have different impacts. * CSCsd15955-May result in the exposure of sensitive configuration information for wireless access points managed by the WCS server, including encryption keys. With the encryption keys for managed wireless networks, an attacker can intercept and decrypt network traffic. * CSCsd15951-May allow an attacker to gain access to the WCS internal database. * CSCse21391-May allow an attacker to gain complete control of a WCS installation. * CSCsd71397-May result in the ability to read from and write to arbitrary locations in the filesystem of a system running WCS, including the ability to overwrite and create new files. * CSCse01127-Exploitation may allow an attacker to execute arbitrary script code in a user's web browser. This may be used to obtain sensitive session information which can be used to access the WCS management interface. * CSCse01409-Exploitation may allow an attacker to obtain sensitive WCS configuration data such as WCS usernames and directory installation paths. 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. WCS version 4.0 can be obtained from http://www.cisco.com/cgi-bin/tablebuild.pl/Wireless_Control_System_Software. Please contact the Cisco TAC to obtain earlier versions of WCS software. +---------------------------------------+ | DDTS | Affected | Fixed | | | Releases | Releases | |------------+-----------+--------------| | | WCS for | WCS for | | | Linux and | Linux and | | CSCsd15955 | Windows | Windows 3.2 | | | 3.2(40) | (51) and | | | and | later | | | earlier | | |------------+-----------+--------------| | | WCS for | WCS for | | | Linux and | Linux and | | CSCsd15951 | Windows | Windows 3.2 | | | 3.2(51) | (63) and | | | and | later | | | earlier | | |------------+-----------+--------------| | | | Vulnerable, | | | WCS for | fix | | | Linux and | available | | | Windows | fourth | | CSCse21391 | 4.0(1) | quarter of | | | and | 2006. | | | earlier | | | | | See | | | | Workarounds. | |------------+-----------+--------------| | | WCS for | WCS for | | | Linux and | Linux and | | CSCsd71397 | Windows | Windows 3.2 | | | 3.2(51) | (63) and | | | and | later | | | earlier | | |------------+-----------+--------------| | | WCS for | WCS for | | | Linux and | Linux and | | CSCse01127 | Windows | Windows 3.2 | | | 3.2(51) | (63) and | | | and | later | | | earlier | | |------------+-----------+--------------| | | WCS for | WCS for | | | Linux and | Linux and | | CSCse01409 | Windows | Windows 3.2 | | | 3.2(51) | (63) and | | | and | later | | | earlier | | +---------------------------------------+ Users of the 3.2 software version can upgrade to 3.2(63) to receive all fixes. CSCse21391 currently has no fix, although there is a workaround that will completely eliminate the vulnerability. Fixed software will be available in the fourth quarter of 2006. Workarounds =========== There are are no workarounds for vulnerabilities described in CSCsd15955 (default database account and password), CSCsd15951 (database user and password in clear text), CSCse01127 (XSS) and CSCse01409 (unprotected HTTP directories). There is a workaround for the vulnerability described in CSCse21391 (default administrator account and password). Users can change the password for the root username via the WCS HTTP management interface. Select Administration -> Accounts -> root to change the password. There is a workaround for the vulnerability described in CSCsd71397 (TFTP file read and write). Follow these steps to mitigate the TFTP vulnerability. * Stop the WCS service via Programs -> Wireless Control System -> StopWCS. * Edit the file \webnms\conf\NmsProcessesBE.conf. WCS is typically installed in C:\Program Files\WCS32. Modify the section # java com.adventnet.nms.tftp.NmsTftpServer [TFTP_ROOT_DIRECTORY dir] [PORT portNo] # RJS WARNING - If you change these lines, you must change the installer. PROCESS com.adventnet.nms.tftp.NmsTftpServer ARGS TFTP_ROOT_DIRECTORY C:/some directory PORT 69 RETRIES 3 TIMEOUT 30000 by placing quotes around the directory path like "C:/some directory". * Start the WCS service via Programs -> Wireless Control System -> StartWCS. Obtaining Fixed Software ======================== Cisco will make free software available to address this vulnerability for affected customers. This advisory will be updated as fixed software becomes available. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment. 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/public/sw-license-agreement.html, or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml. Do not contact either "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 agreement 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 who do not hold a Cisco service contract and customers who purchase through third-party vendors but are unsuccessful at obtaining fixed software through their point of sale should get their 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 Have your product serial number available and give the URL of this notice as evidence of your entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC. Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for additional TAC contact information, including special 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. 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-20060628-wcs.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-teams@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 | 2006-June-28 | 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. - --------------------------------------------------------------------- ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================