OWASP London chapter meeting (Guest Speaker)

It is a great honour to have been invited to speak at the OWASP London Chapter meeting this May. (Thursday, 18 May 2017 - Central London)
More importantly, as this meeting is sponsored by WorldPay, it is a fantastic opportunity to share previous work I have done on payment systems over the past few years.   

Allow me to say a big Thank You to the OWASP London Chapter organisers for the work they put in to keep the London chapter so live & active, and of course to WorldPay, for supporting this meeting, and for being so kind to host it at their premises. If you are interested to find out more OWASP, make sure you attend the OWASP Summit 2017.

Given the opportunity for this blog-post, I would also like to thank you all for your messages about my talk. I am very pleased to hear that the tickets for OWASP London Chapter meeting this month were sold-out that fast and that the organisers had to activate the waiting list. The organisers also mentioned that due to the high demand, they will consider live streaming. So, stay tuned for updates on that as I am planning to schedule a number of tweets to go out before and during the talk. Thus, for updates you can follow me on Twitter: @drgfragkos

30 days to go for the OWASP Summit 2017

Owasp will host its 2017 Global Summit in London where hundreds of participants will join forces in Working Sessions focused on solving hard Application and Cyber Security problems.

This is not a conference with unidirectional presentations. Using the same model as the past two OWASP Summits in Portugal, this 5-day event will be a high-energy experience, during which attendees get the chance to work and collaborate intensively. Every thoroughly prepared working session is geared towards a specific application security challenge and will be focused on actionable outcomes.

With participants flying from all over the world and from major security/development teams, service/product providers and research organizations, this is the place to be to learn and collaborate with industry peers (and even competitors).

The event is split over the following tracks, each focusing on a specific set of challenges:

• Threat Modeling - This is one of the strongest tracks, with most of the core Threat Modeling talent in the world joining forces and collaborating
• OwaspSAMM - This is another track where we have the main contributors and users of this Owasp project participating at the Summit
• DevSecOps - This track has been generating quite a buzz among participants, since it is addressing real pain points and problems that companies face today
• Education - Always strong in OWASP, this track ranges from University master degree to how to create the next generation of AppSec professionals
• Mobile Security - Another track where the key Owasp leaders of Mobile-related Owasp projects are participating
• CISO - This track reaches a wide audience of CISOs and covers a wide range of CISO-related topics
• Research - This track covers really important and interesting research topics (it’s important to look at the future and work on the next generation of Application Security)
• Agile AppSec - This is a track driven by a couple participants who really care about Agile and want to find better ways to integrate it with AppSec practices
• Security Crowdsourcing - This is a track that is focused on scaling AppSec activities via internal and external crowdsourcing
• Owasp Project’s Summit - Last but not least, this track has 31x Working Sessions directly related to an Owasp Project (with most having the Project Leader participating)

Ransomware outbreak at a global scale | #wannacry

Approximately 74 countries are currently under an ongoing cyber-attack. The NHS in the UK has been massively affected, along with major companies worldwide. 

Computer systems are being infected with the ransomware known as WanaCrypt0r 2.0 (known as WCry and WannaCry). The malicious file targets a known computer vulnerability (MS17-010). 

System Administrators:
- Ensure systems are fully patched, especially by addressing the MS17-010 vulnerability. 
- Disable SMBv1.
- Firewall protect ports: 139/445 & 3389
- Make sure you have a backup of your data and it is also stored offline. 
- Ensure Antivirus is installed and active.

Legacy systems should be isolated and any systems which are infected, consider removing them from the network. 

Under Attack?

• Customers in the healthcare sector should follow the national guidance as instructed by the NHS and the National Cyber Security Centre (NCSC).
• UK customers consult the Cyber Information Sharing Platform (CiSP).
• DeepRecce customers requiring further advice or information should contact our 24/7 incident response line www.deeprecce.com

--

Repository of information:

WannaCry|WannaDecrypt0r NSA-Cybereweapon-Powered Ransomware Worm
https://gist.github.com/pcostesi/87a04a3bbbdbc4aeb8b787f45eb21197 

Microsoft released notes:
https://blogs.technet.microsoft.com/mmpc/2017/05/12/wannacrypt-ransomware-worm-targets-out-of-date-systems/

OWASP Top 10 (2017 Release Candidate) - Thoughts

OWASP Top 10 2017 Release Candidate - PDF

I understand the importance of highlighting the Underprotected APIs (A10), and I do agree with the importance of it. However, to my eyes this is another stage during a security assessment, while the penetration tester is engaging into testing for different types of Injections (A1). 

I believe Injections (A1) should include the Underprotected APIs.
(especially based on the example attack scenarios given in the PDF page 17 for the Top 10 RC)

From what I have seen on several real-world projects, Unvalidated Redirects and Forwards, is a very common security issue (when you manage to identify where it is hiding) but it is not highlighted in security reports (and penetration testing reports) that often. Thus, it seems and fills like, it is not that popular as a finding. 

One of the main reasons this particular security issue is not mentioned that often, is because businesses (the business perspective) see this highlighted risk as a "two-step attack", so, instead of addressing it, they simply "accept the risk".

From what I have seen in different real-life projects, dropping "A10 – Unvalidated Redirects and Forwards" will be mistakenly perceived (misunderstood) as an "insignificant" security issue, while, it can be used to spawn a number of attacks. 

If an attacker manages to redirect/forward a user to a fraudulent website (that looks exactly like the legitimate one), then it is game-over for that user. How many of you remember the issues with the Unicode URLs back in the day? In one case, two companies lost a significant amount of money because of a fraudster, due to this "insignificant" issue.

Just to mention a couple very recent examples: 
punicode https://www.wordfence.com/blog/2017/04/chrome-firefox-unicode-phishing/
or the unvalidated redirect on linkedin, which allowed to download malware from linkedin redirects (even though they were hashing the urls).
https://gfragkos.blogspot.co.uk/2015/06/linkedin-security-issue-unvalidated.html

So, in my humble opinion, A1 should be Injections that include calls to Underprotected APIs: 
A1 - Injections, including Underprotected APIs

and keep:
A10 - Unvalidated Redirects and Forwards. 

This blog post is intended to be perceived as food-for-thought.

Xcode update is stuck at waiting

This is something that happens often and I wanted to make sure you are going to fix this the right away, without causing any problems to your system and save you some time. 

This was written for Xcode 8.3 (but it has worked for previous versions as well) and it is confirmed that it works on:
OS X 10.10 Yosemite, OS X 10.11 El Capitan, and macOS 10.12 Sierra.

I am assuming that you are at your Updates screen and Xcode is stuck at "waiting". Click on Xcode (the actual name/caption of the pending update) and the relevant page of Xcode on App Store will show (see below). 

When you click the Update button (beneath the application icon on App Store), a little progress bar appears beneath it, and it usually tells you "less than a minute" (but it is stuck there forever). 

Don't navigate away from this screen on App Store, because we want this little progress bar to be our indicator on what is happening. 

• Open a new Finder window and click Applications (top left hand side). 
• Scroll down to the Xcode application and drag the application to Trash.
• You will be asked to confirm your password before moving Xcode to Trash.
• Once you enter your password, there will be a prompt asking you if you want to cancel the update or delete the app. Choose delete. 
• You will notice that immediately after clicking delete, xcode starts downloading the updated version, and you can see/confirm that at the progress bar (as discussed earlier on) and it will tell you how long it will take (it can take an hour, depending on your Internet connection).
• (optional) If you want to save some space on your disk, go to Trash, right-click on xcode, and delete it completely from the system. It will ask you again to confirm your password. 

Don't forget to plug-in your computer, as the whole process takes a while, and the computer might go to sleep and suspend the download and/or the installation.