|By Ben Forta||
|December 21, 2005 06:15 PM EST||
SQL Injection Attacks, Easy To Prevent, But Apparently Still Ignored
I was just on a web site (no, not a ColdFusion powered site, and no I will not name names) browsing for specific content. The URLs used typical name=value query string conventions, and so I changed the value to jump to the page I wanted. And I made a typo and added a character to the numeric value. The result? An invalid SQL error message.
That's bad. Very very bad. It means that I was able to create a SQL statement that was submitted to the database for processing, a SQL statement that was passed to the database as is, unchecked.
You'd think that by now we'd have learned to lock down our code so as to prevent SQL injection attacks, but apparently this is not the case. You do not know what a SQL injection attack is? Well, read on.
Consider the following simple dynamic ColdFusion query:
Scared? You should be. SQL statements are not just used for queries. They are also used by most DBMSs to create and drop tables, create user logins, change passwords, set security levels, manage scheduled events, even creating and dropping entire databases. And whatever features are supported by your DBMS may be accessible this way.
Before I go further I must point out that this is not a ColdFusion vulnerability at all. In fact, it is not even a bug or a hole. This is truly a feature – many DBMS do indeed allow queries to contain more than a single operation, this is legal and by design.
Of course, you should always be checking parameters anyway before passing them to your DBMS. Passing client supplied data (URL parameters, FORM fields, and even cookies) through unchecked is programmatic suicide. Attacks aside, it is flat out unsafe to ever assume that data submitted by a client can be used as is.
As such, you should already be using code like this:
Of course, you may want more control, in which case you could use code like this:
and not IsNumeric(URL.CustID)>
… throw an error or something …
And as an additional line of defense you can use <cfqueryparam>, as seen here:
WHERE CustID=<cfqueryparam value="#URL.CustID#" cfsqltype="CF_SQL_INTEGER">
The bottom line is that SQL injection attacks have been around for as long as dynamic SQL itself. ColdFusion has made it incredibly easy to protect yourself against such attacks. Be it <cfparam> or <cfqueryparam> or your own conditional processing, it's simple to protect yourself, and your responsibility to do so.
If you have not been paying attention to this risk, stop whatever you are doing, fire up your IDE, and do a search for every single <cfquery> in your code. Then quickly scan to find any that contain #'s in them (that are not enclosed in quotes or passed to <cfqueryparam>), and make a list of the variables used. If any of them are URL parameters or FORM fields, create a <cfparam> for each (at the top of the page, or before the <cfquery>). It's that simple. Really. There is no legitimate reason not to protect yourself, so just do it. Now! And I mean right now, before you leave for the day or take off for the holidays, and despite whatever project you are working on or deadline you are up against. No excuses (and if your boss complains about you switching gears to take care of this one, send him my way!).
Enough said! (I hope).
|pranny 03/24/09 08:59:59 AM EDT|
I faced the same problem. Search for cfquery across all my apps. And i found billions of pages that need to be modified. I have a small script that helps in automating the process of applying CFQUERYPARAM. Of course, this script is a li'l specific to my need, but with a little modification, anyone can use it. The script is located at http://codecontrol.blogspot.com/2009/02/cfml-parser-in-python-part-2.html
Any suggestions/critism most welcome.
|dskinkead 08/06/08 03:08:27 PM EDT|
Good info, but I believe you are completely correct about textual data not being a threat.
Let's say you coded in a file named test.cfm:
SELECT * FROM sometable where field1 = '#preservesinglequotes(url.name)#'
Then a user put in this url:
The result is sql injection. I have tested this and know it to be true. However this will only work if you use "Preservesinglequotes", which I have used many times. So we must protect ourselves even with textual data.
|Luis Melo 07/24/08 10:34:54 AM EDT|
Our system was not SQL Injection proof and we recently suffered an attack that corrupted the data in some of our database tables. The attack was quite elegant and fortunately did not cause severe damage other than the appending of a SCRIPT sting to a bunch of VARCHAR fields. This was meant to actually execute a JS file and this qualifies as a XSS attack.
In researching the Web for a solution for the problem, and a way to immunize our CF application against further attacks, we came across the CFQUERYPARAM solution, but our application has over 5000 files, each with one or more Queries and Stored Procedure calls. Implementing such a solution in such an extensive amount of files was impossible in a timely fashion, so I looked for another solution and came across a ColdFusion written function (isSqlInjection) that showed some promise but some shortcomings as well.
I wanted something that we could deploy fast and that would immunize the entire application in one single swoop.
As far as I understand, SQL injections can come from either FORM fields or from URL passed variables. Therefore we developed a function that was placed in our application.cfm and therefore used by all our CFM files. The function used a custom developed Regular Expression to check all URL and FORM fields for possible SQL Injections.
We were able to develop this in one day and implement it immediately. That same night we were able to catch and prevent 2 more SQL Injection attempts.
• Checks all FORM and URL input for SQL injection code
• Interfaces (CFHTTP) with ARIN WHOIS Database Search (http://ws.arin.net/whois/) to get ISP information for the offender’s IP.
• Automatically sends an abuse report to the ISP concerning the attack.
• Displays a message informing the hacker that the attack was logged, that his/her ISP was contacted and that he/she is breaking the law
• Sends us an email with the SQL Injection string, IP address and other information.
• Stores the hacker’s IP address in an APPLICATION array (Black List).
o Each time a page in our application is requested, the IP address (CGI.REMOTE_ADDR) is compared with those in the Black List and if it is present, page execution is halted right at the application.cfm level returning a blank page to the browser
o Black List entries that are older than one hour are cleared by a scheduled task on an hourly basis.
We are making this code available to other CF developers for free. Please request a copy by email. [email protected].
If after receiving it you have suggestions or improvements, please send them my way as well.
|Angela 04/24/08 06:09:38 PM EDT|
Isn't WHERE id = #Val(url.id)# just as effective as using cfparam or cfqueryparam?
|Will 06/17/06 02:53:03 PM EDT|
Hi, I really enjoyed your article about injection attachs, but you forgot one small detial. Even if you use cfparam, it appears that you are still vuneralbe to injection attachs via forms. someone could fill a form filed with some thing like this
"# #drop table"
the first and last quotes seperate your statement from and move it ouside of the forms "quoes" and thene the the next two #'s creat and execute a new statement.
|CFDJ News Desk 12/21/05 07:29:48 PM EST|
Ben Forta's ColdFusion Blog: SQL Injection Attacks, Easy To Prevent, But Apparently Still Ignored. I was just on a web site (no, not a ColdFusion powered site, and no I will not name names) browsing for specific content. The URLs used typical name=value query string conventions, and so I changed the value to jump to the page I wanted. And I made a typo and added a character to the numeric value. The result? An invalid SQL error message.
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
Feb. 10, 2016 02:30 PM EST Reads: 417
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
Feb. 10, 2016 02:30 PM EST Reads: 392
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.
Feb. 10, 2016 01:15 PM EST
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Avere delivers a more modern architectural approach to storage that doesn’t require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbuilding of data centers ...
Feb. 10, 2016 12:45 PM EST
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
Feb. 10, 2016 12:15 PM EST Reads: 424
SYS-CON Events announced today that VAI, a leading ERP software provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. VAI (Vormittag Associates, Inc.) is a leading independent mid-market ERP software developer renowned for its flexible solutions and ability to automate critical business functions for the distribution, manufacturing, specialty retail and service sectors. An IBM Premier Business Part...
Feb. 10, 2016 12:00 PM EST Reads: 618
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
Feb. 10, 2016 11:00 AM EST Reads: 185
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
Feb. 10, 2016 10:45 AM EST Reads: 246
Fortunately, meaningful and tangible business cases for IoT are plentiful in a broad array of industries and vertical markets. These range from simple warranty cost reduction for capital intensive assets, to minimizing downtime for vital business tools, to creating feedback loops improving product design, to improving and enhancing enterprise customer experiences. All of these business cases, which will be briefly explored in this session, hinge on cost effectively extracting relevant data from ...
Feb. 10, 2016 10:45 AM EST Reads: 106
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
Feb. 10, 2016 10:30 AM EST Reads: 216
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts...
Feb. 10, 2016 09:00 AM EST Reads: 383
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
Feb. 10, 2016 09:00 AM EST Reads: 184
SYS-CON Events announced today that iDevices®, the preeminent brand in the connected home industry, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. iDevices, the preeminent brand in the connected home industry, has a growing line of HomeKit-enabled products available at the largest retailers worldwide. Through the “Designed with iDevices” co-development program and its custom-built IoT Cloud Infrastruc...
Feb. 10, 2016 08:00 AM EST
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
Feb. 10, 2016 07:45 AM EST Reads: 437
Silver Spring Networks, Inc. (NYSE: SSNI) extended its Internet of Things technology platform with performance enhancements to Gen5 – its fifth generation critical infrastructure networking platform. Already delivering nearly 23 million devices on five continents as one of the leading networking providers in the market, Silver Spring announced it is doubling the maximum speed of its Gen5 network to up to 2.4 Mbps, increasing computational performance by 10x, supporting simultaneous mesh communic...
Feb. 10, 2016 07:00 AM EST
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
Feb. 10, 2016 12:45 AM EST Reads: 201
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
Feb. 10, 2016 12:00 AM EST Reads: 211
One of the bewildering things about DevOps is integrating the massive toolchain including the dozens of new tools that seem to crop up every year. Part of DevOps is Continuous Delivery and having a complex toolchain can add additional integration and setup to your developer environment. In his session at @DevOpsSummit at 18th Cloud Expo, Miko Matsumura, Chief Marketing Officer of Gradle Inc., will discuss which tools to use in a developer stack, how to provision the toolchain to minimize onboa...
Feb. 9, 2016 07:45 AM EST Reads: 106
SYS-CON Events announced today that Fusion, a leading provider of cloud services, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Fusion, a leading provider of integrated cloud solutions to small, medium and large businesses, is the industry's single source for the cloud. Fusion's advanced, proprietary cloud service platform enables the integration of leading edge solutions in the cloud, including clou...
Feb. 6, 2016 03:30 PM EST Reads: 765
Most people haven’t heard the word, “gamification,” even though they probably, and perhaps unwittingly, participate in it every day. Gamification is “the process of adding games or game-like elements to something (as a task) so as to encourage participation.” Further, gamification is about bringing game mechanics – rules, constructs, processes, and methods – into the real world in an effort to engage people. In his session at @ThingsExpo, Robert Endo, owner and engagement manager of Intrepid D...
Feb. 5, 2016 09:00 PM EST Reads: 825