All about IT Governance

I was speaking to a VP of IT of a financial institution in the San Francisco bay area to understand what keeps him up at nights - Two issues - Security vulnerabilities of financial SW that was developed in-house  & some of them that they have installed several years ago. And the other issue was telcom applications. The telcom applications support is slowly outsourced to MSP so he was not concerned on a long term.

Security vulnerabilities in SW can be used as a vehicle to expose the privacy and data. Vulnerabilities from inadequately designed or written code create opportunities for attackers to threaten privacy and steal data.

The major vulnerabilities that is taking a lot of attention these days are:

Buffer Overflow

Cross-Site Scripting

Parameter Manipulation

SQL Injection

Tools from companies such as Coverity (SWAT), Fortify (360), Ounce, etc help detect the Security vulnerabilities and eliminate in the place they reside : in the source code itself.

Which applications should an organization be concerned about?
Security vulnerabilities can exist in virtually any application accessible via the Internet or other networks. Web applications provide a popular avenue for delivering information and services, which makes them attractive targets for attack. These applications can contain security vulnerabilities that, unless identified by some reliable means, can remain undetected until an exploit is discovered and the damage has been done.

Newer SW development tools along with coding SW applications with Security in perspective (adequate checks and closing doors for any threats such as crosss-site scripting) would make more robust SW leading to reduced threats and hence exposures. But these software wou;ld interface with legacy SW applications and thats where my new connection (VP) was expressing his top most challenge that he is facing now.

What are the most common application vulnerabilities that could compromise the information security?

The most common application security vulnerabilities fall into two categories:

• coding errors and
• design flaws.

Coding errors are programming flaws related to input validation, unbounded parameters and encoding, and they include:

• Unvalidated sources of input
• Use of unvalidated input
• Unvalidated output streams

Design flaws could include the following issues not implemented appropriately:

• Flawed authorization and access control - Access control and authorization would
• Flawed authorization and session management
• Native code and buffer overflows
• Dynamic code
• Weak encryption
• Application configuration
• Denial of service
• Network communications - Network communications btw applications, one feeding fake data and the other not validating for fake data can mislead the design, and design based on this data could end up as a fraud - somebody on the other end could be data-diddling for all you know.
• Unsupported application interfaces - Connecting to/from an interface that has not implemented security measures to overcome compromise of information security can be a nightmare as the interface cannot be brought down instantly and even if the measures are taken at the receiving end, it costs a lot of processing power at the receiving end to detect, process and respond back with a error code for each data instance. So, data interface should be treated with utmost importance whenever interfacing with a legacy applications that known to have none/weak in security design.
• Improper administrative and exception handling

So,….. What would you recommend to strengthen the security for legacy applications? I will write in the next blog.

Security gears today including firewalls, IDS/IPS and IDMs are key components of Information security department however, it is a common observation that these network gears were inherited from another team or a predecessor and happens to have no common policy. The benefit of having a policy for these security gears is - scalability.

 The more the need for firewalls, the lesser the problem it would be if you have consistent policies - it is easy to push the same policy accross to newer locations and thus policy is a must.

What is the difference?
27001 says, how to build your Information security practice or department  while 27002 talks about the security best practices. ISO 27002 was formerly 17799 standard.