-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN ColdFusion Information Exposure (CFCACHE Tag) January 18, 2000 17:00 GMT Number K-015 ______________________________________________________________________________ PROBLEM: Certain files that are not normally publicly available may be downloaded and used as system reconnaissance information by users with malicious intent. PLATFORM: Systems running ColdFusion Server 4.0x (all editions). DAMAGE: The information about a server's web document directory structure and URL parameters used to call site pages can provide useful information for planning an attack on that server. SOLUTION: Download the new CFCACHE.CFM file and follow the directions given in the advisory. The solution has been incorporated in ColdFusion 4.5. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. The information about the vulnerability ASSESSMENT: is publically available. ______________________________________________________________________________ The text of the advisory was taken from the URL http://www.securiteam.com /windowsntfocus/ColdFusion_Information_Exposure__CFCACHE_Tag_.html on January 12, 2000. The text was dated 5/1/2000. [Start Beyond-Security's SecuriTeam.com Advisory] Title ColdFusion Information Exposure (CFCACHE Tag) Summary The CFCACHE tag is a feature in ColdFusion 4.x that performs template caching to increase page delivery performance by intelligently compiling and storing the output of CFML pages for faster access. When this tag is utilized in a .CFM page it creates several temporary files, including one that contains absolute filenames with directory path information, URL parameters and timestamps. In ColdFusion 4.0x, these files are stored in the same directory as the .CFM page, usually in a publicly accessible web document directory. Because these files are accessible to browsers in the web document directory, users wishing to do so could download this file with a browser and obtain information about the web document directory structure or URL parameters used to call site pages that would not otherwise be accessible. Allaire has released a new version of the CFCACHE tag that is also available in ColdFusion 4.5 that allows users to specify a non-web document directory to store the ! Details Vulnerable systems: ColdFusion Server 4.0x (all editions) When utilized in a .CFM page, the CFCACHE tag creates two types of files: a "cfcache.map" file, containing pointers to temporary cache files, and the temporary cache ".tmp" files themselves, which contain the cached HTML output. The "cfcache.map" file includes absolute filenames with full directory path information, URL parameters and timestamps. In ColdFusion 4.0x, since this map file is stored in the same directory of the cached page, usually in a publicly accessible web document directory, the file is accessible to browsers. Users wishing to do so could download these files with a browser and obtain information about the web document directory structure or URL parameters used to call site pages that would not otherwise be accessible. The CFCACHE tag creates the following files in each web directory from which it is invoked: 1. Multiple .tmp files, which contain the HTML code from a processed .CFM page 2. A single .map file, containing pointers to .tmp files within the directory The .map file includes the following information: 1. Full path for each managed .tmp file in the directory. 2. A timestamp indicating when the cache file was created. 3. A line referring to the requested page and the full URL (including variables) that was passed to it. For example, a sample cfcache.map file might look like this: [product.cfm?product_id=9] Mapping=C:\Inetpub\wwwroot\products\CFC155.tmp SourceTimeStamp=10/06/1999 08:02:06 AM If downloaded, these files expose template path and URL information not normally publicly available that could be used as an additional reconnaissance tool by users with malicious intent. Patch: Allaire has published a security bulletin, notifying customers of the problem. Allaire has also releasing the new CFCACHE tag which will allow site administrators to specify the directory in which the temporary "cfcache.map" and "*.tmp" files are stored, allowing them to store the files in non-public directories to prevent unauthorized access, and has included this new version of the CFCACHE tag in ColdFusion 4.5. Download - ColdFusion CFCACHE.CFM tag file. Customers should make a backup copy of their existing CFCACHE.CFM file in the \CFUSION\BIN\CFTags\ directory, then download and copy the new CFCACHE.CFM file into their \CFUSION\BIN\CFTags\ directory, replacing the old CFCACHE.CFM file. They should then modify their site to make use of the new "CacheDirectory" attribute of the tag, specifying a directory that is not part of the web document directory structure and inaccessible to Internet clients. The format of the new attribute is: Note that all tag attributes available to the previously released CFCACHE tag are still available in this new tag. A sample of the new cfcache.map file is below: [C:\Inetpub\wwwroot\index.cfm] Mapping=D:\files\cache\CFC95.tmp SourceTimeStamp=10/18/1999 02:14:28 AM Customers should also closely monitor their web logs for browser HTTP requests for "cfcache.map" and "*.tmp" files as they would requests for files in the /cfdocs or /cfide/administrator directories, treating these requests as malicious reconnaissance probes. Additional information The information was provided by: Allaire Security Zone. [End Beyond-Security's SecuriTeam.com Advisory] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Beyond-Security's SecuriTeam.com for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), use one of the following methods to contact CIAC: 1. Call the CIAC voice number 925-422-8193 and leave a message, or 2. Call 888-449-8369 to send a Sky Page to the CIAC duty person or 3. Send e-mail to 4498369@skytel.com, or 4. Call 800-201-9288 for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 423-3331 (28.8K baud) CIAC has several self-subscribing mailing lists for electronic publications: 1. CIAC-BULLETIN for Advisories, highest priority - time critical information and Bulletins, important computer security information; 2. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 3. SPI-NOTES, for discussion of problems and solutions regarding the use of SPI products. Our mailing lists are managed by a public domain software package called Majordomo, which ignores E-mail header subject lines. To subscribe (add yourself) to one of our mailing lists, send the following request as the E-mail message body, substituting ciac-bulletin, spi-announce OR spi-notes for list-name: E-mail to ciac-listproc@llnl.gov or majordomo@rumpole.llnl.gov: subscribe list-name e.g., subscribe ciac-bulletin You will receive an acknowledgment E-mail immediately with a confirmation that you will need to mail back to the addresses above, as per the instructions in the E-mail. This is a partial protection to make sure you are really the one who asked to be signed up for the list in question. If you include the word 'help' in the body of an E-mail to the above address, it will also send back an information file on how to subscribe/unsubscribe, get past issues of CIAC bulletins via E-mail, etc. PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-005: Microsoft "Virtual Machine Verifier" Vulnerability K-006: Microsoft - Improve TCP Initial Sequence Number Randomness K-007: Multiple Vulnerabilities in BIND K-008: ExploreZip (packed) Worm K-009: Qpopper Buffer Overflow Vulnerability K-010: Solaris Snoop Buffer Overflow Vulnerability K-011: Buffer Overflow Vulnerabilities in SSH Daemon and RSAREF2 K-012: Cisco Cache Engine Authentication Vulnerabilities K-013: Buffer Overflow in Sun Solstic AdminSuite Daemon sadmind K-014: HP-UX Aserver Vulnerability -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOIdd9LnzJzdsy3QZAQEpSQP7BlGFvhd8uAktr7H5fEbrCojh7Dwykhcu QLC9Puo32Bz9VoWRnhWPlO1llZ9P6x4OfQ9GSb/IXnqBvy7cCqAk2ptEfRF74H1H tNfbNPXFsUM9qw+AUfrhhndp0ZuDQsv3S8KhdHYnh/Ul2wCwU5TGG7QTaCBOxt3i hr26pf3OwAs= =uAQ/ -----END PGP SIGNATURE-----