Costel Maxim

Security QA Lead Intel's Open Source Technology Center (RO)

BIOGRAPHY

I started down the path of information security long before my professional career started because of my intense desire to understand how things really worked underneath everything. I am currently the Security QA lead in Intel’s Open Source Technology Center here in Bucharest. We are a team that focuses on the security of numerous open source projects including Android, IOT, Crosswalk, Tizen and many others.

We hunt security bugs by doing feature validation, penetration testing, source code analysis and fuzzing.

Twitter: twitter.com/costelmaxim
Linkedin: https://ro.linkedin.com/in/costelmaxim

Finding media bugs in Android using file format fuzzing

The presentation will give a brief overview on the topic of file format fuzzing and how this process can lead to the discovery of vulnerabilities inside different software components and then focus on exposing how this approach can be used inside an Android environment, more precisely to target the media framework in Android.
A custom fuzzing tool has been developed for this purpose and had good results in terms of discovered issues.The main idea behind developing this fuzzing tool is to create corrupt but structurally valid media files, direct them to the appropriate software components in Android to be decoded and/or played and monitor the system for potential issues (i.e system crashes) that may lead to exploitable vulnerabilities. The malformed audio and video files are created in an automated manner using several open-source tools that have been modified for this project. Custom developed Python scripts are used to send the malformed data across a distributed infrastructure of Android devices, log the findings and monitor for possible issues, in an automated manner. The actual decoding of the media files on the Android devices is done using the Stagefright framework, which represents the core of the media stack in Android and permits decoding media files using both software and hardware decoders.
An example of a fuzzing campaign for this scenario would be as follows: the fuzzing tool was left to run for a period of 8 weeks. During this time, a number of approximately 1 million media files were sent for decoding to the fuzzing infrastructure. This produced an unexpected result of 185000 crashes. After implementing a triage mechanism to sort out through the crashes, a number of 35 unique issues remained. Other similar campaigns were run over time and a total of 4 CVE entries were issued by Google and many bugs are still under consideration.

Are you the next cyber security superstar?

If you are passionate about an information security topic or you have strong technical skills developing researches on your own, you should definitely Apply at Call for Papers. By submitting you will have the chance to showcase your work to +2000 attendees.

Other speakers joining this year

Konrad Jedrzejczyk

Senior Incident IS Response Analyst (PL)

Catalin Cosoi

Chief Security Strategist Bitdefender, Romania

Jayson Street

Infosec Ranger Pwnie Express (USA)

Ready for this year's presentations?

By registering you will unlock access to 60+ speakers and two full days with cyber security news & showcases from worldwide leaders.

0
SPEAKERS
0
COUNTRIES
0
ATTENDEES
0
HACKING
COMPETITIONS
0
COMPANIES

Sponsors & Partners

They help us make this conference possible.

POWERED BY

As an infrastructure operator, technology integrator and IT&C services provider, Orange Business Services supports businesses and public entities in their digital transformation. Collect, transport, protect, store and process and analyze: they orchestrate every phase of the data journey, for your business to create even more value.

WWW.ORANGE.RO

PLATINUM PARTNERS

Ixia provides testing, visibility, security solutions, network testing tools and virtual network security solutions to strengthen applications across physical and virtual networks.

WWW.IXIACOM.COM

Secureworks provides threat intelligence-driven security solutions for organizations to prevent, detect, rapidly respond and predict cyberattacks.

WWW.SECUREWORKS.COM

GOLD PARTNERS
SILVER PARTNERS
GAMING PARTNERS
VIP & SPEAKER LOUNGE PARTNER
BRONZE PARTNERS
COMMUNITY & MEDIA PARTNERS