Most developers have little to no formal training on security-related aspects of their profession, which has caused software to be a constant source of vulnerabilities. But what resources do developers have at hand to evaluate their work security-wise? And are those resources providing information and tooling which positively affect software security?

1. © 2012
Presented by:
Software Development:
You Better Do What They Told Ya
Ulisses Albuquerque
ualbuquerque@trustwave.com

2. © 2012
$ whois urma
• Ulisses Albuquerque
– App Security Consultant for Trustwave SpiderLabs
• Penetration testing
• Code reviews
• Secure development training
– Passionate and opinionated developer
• Ruby and C FTW
– Long time F/LOSS advocate
• It’s all about the community

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Who is SpiderLabs?
SpiderLabs is the elite security team at Trustwave, offering clients the most advanced
information security expertise and intelligence available today.
The SpiderLabs team has performed more than 1,500 computer incident response and
forensic investigations globally, as well as over 15,000 penetration and application security
tests for Trustwave’s clients.
The global team actively provides threat intelligence to both Trustwave and growing
numbers of organizations from Fortune 50 to enterprises and start-ups.
Companies and organizations in more than 50 countries rely on the SpiderLabs team’s
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Agenda
• Motivation
• Non-Functional Requirements
• Who You Gonna Call?
• Official Documentation
• What Can We Do About It?
• Conclusion

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Motivation

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Motivation
Really, b*tch?
http://seclists.org/fulldisclosure/2013/Apr/173
Meanwhile, on [full-disclosure]…

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Motivation
http://memegenerator.net/instance/37406597

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Motivation
• Are developers really at fault?
• Do we (ahem, them) really suck this much?
• Do we have an attitude problem between
developers and security people in the software
industry?
• Obviously not, developers SUCK, right?

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Non-Functional Requirements

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Non-Functional Requirements
• Implicit expectations about the software
• It should be fast
• It should not crash
• It should be user-friendly
• It should be secure

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Non-Functional Requirements
http://memegenerator.net/instance/37522060

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Who You Gonna Call?

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Who You Gonna Call?
Software
Concepts
Business
Needs
Constraints
Craftmanship

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Who You Gonna Call?
• How to fill the concept-to-code knowledge gap?
• Google can help
• Stack Overflow can help a lot
• But…
There’s more than
one way to do it™
http://www.spidereyeballs.com/os5/perl/small_os5_r23_1542.html

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Who You Gonna Call?

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Who You Gonna Call?

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Who You Gonna Call?

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Who You Gonna Call?
• Official documentation should be the most
trustworthy source of information
• We don’t want to know just any “how to do it”
• We want to know “how to do it in a secure way”
http://www.themahoganyblog.com/2012/04/attention-music-imposter/laptop-thief/
<3 Stack Overflow!

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How are vendors providing information on
the security aspects of their tools, APIs
and frameworks?

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Official Documentation

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Official Documentation - Java
http://docs.oracle.com/javase/7/docs/api/java/io/File.html#toURL()

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Official Documentation - Java
• Pros
• Use of annotations to indicate deprecated APIs
• Compiler warnings
• Clear indication of reason for deprecation
• Security aspects mixed with functional description
• Cons
• Deprecation is not a security-oriented feature

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Official Documentation - .NET
http://msdn.microsoft.com/en-us/library/system.collections.caseinsensitivehashcodeprovider.aspx

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Official Documentation - .NET
• Pros
• Use of annotations to indicate deprecated APIs
• Compiler warnings
• Cons
• No indication of reason for deprecation
• Deprecation is not a security-oriented feature

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Official Documentation
• What about code samples?
http://msdn.microsoft.com/en-us/library/system.io.file.aspx
Race condition
in sample code?

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Official Documentation
• It’s not only about documentation in web pages
• manpages are very inconsistent in their presentation of
security-relevant information
• Shame on us, F/LOSS developers

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Official Documentation

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Official Documentation

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Official Documentation

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Official Documentation

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Official Documentation
http://memegenerator.net/instance/37529225

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Sometimes it’s not just incompetence or
laziness, but intentionally harmful
documentation

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Official Documentation
http://docs.oracle.com/cd/E13222_01/wls/docs81b/secintro/archtect.html#1033713
Are you f*cking
kidding me,
Oracle?

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What Can We Do About It?

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What Can We Do About It?
• We = security professionals
– Ignorance != incompetence
– Assume developers are unaware of their mistakes
– Avoid confrontation
• Do proper secure SDLC and be involved in ALL
stages of development
– Help developers make the right choices instead of just
vetoing them
– Easier said than done, unfortunately

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What Can We Do About It?
• We = developers
– Developers write tools for developers
– Add consistent and comprehensive security
information to documentation
– Help fellow developers make the right choices
• Deprecate what needs deprecation
• Remove what is too dangerous

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Conclusion

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Conclusion
• Developers need training
– Obviously
• Vendor documentation MUST improve
– Even trained developers need context to guide their
choices
• Developers are easy targets after a breach
– Their work takes months or years, breaches happen in
the blink of an eye

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Conclusion
• MOAR ACCOUNTABILITY! MOAR RESOURCES!
– Train your teams
– Assess your results and ACT on them
• Security people need to position themselves as
facilitators rather than opponents
– Who enjoys having their work vetoed after months
working on it?

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Questions?

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Trustwave SpiderLabs
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