Secure Authentication. Are you sure you do it right?

Transcript

1. JULIA POTAPENKO
   SECURE AUTHENTICATION
   ARE YOU SURE YOU DO IT RIGHT?
   

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2. JULIA POTAPENKO
   Security Software Engineer at Cossack Labs
   with background in iOS app development
   Mobile/Security Lead at WWCodeKyiv
   Chapter Leader of OWASP Zhytomyr
   @julepka
   

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3. WE WILL TALK ABOUT
   ★ Security as a part of development process
   ★ Standards for secure authentication
   ★ Common auth mistakes in iOS apps
   

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4. SDLC
   SOFTWARE DEVELOPMENT LIFE CYCLE
   Requirements definition
   Design
   Development
   Testing
   Deployment
   Maintenance
   You are here
   

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5. SDLC
   SOFTWARE DEVELOPMENT LIFE CYCLE
   Requirements definition
   Design
   Development
   Testing
   Deployment
   Maintenance
   You are here
   MVP IN ONE MONTH
   WE HAVE NO TIME
   DOCS WILL WAIT
   WE ARE AGILE
   

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6. SDLC
   SOFTWARE DEVELOPMENT LIFE CYCLE
   Requirements definition
   Design
   Development
   Testing
   Deployment
   Maintenance
   You are here
   S-
   SECURE
   Security training
   + security requirement
   + risk assessment
   + threat modeling
   + secure design review
   + secure coding
   + secure code review
   + security testing
   + pentest
   + responding
   to incidents
   

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7. EXAMPLE. USER REGISTRATION
   1. Enter phone number/email
   
   
   
   

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8. EXAMPLE. USER REGISTRATION
   1. Enter phone number/email
   
   2. Enter OTP
   
   

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9. EXAMPLE. USER REGISTRATION
   1. Enter phone number/email
   
   2. Enter OTP
   
   3. Accept TC & PP
   

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10. EXAMPLE. USER REGISTRATION
    1. Enter phone number/email
    
    2. Enter OTP
    
    3. Accept TC & PP
    INVEST IN SECURITY
    AWARENESS
    

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11. RISKS
    • Legal Responsibility
    • Reputation Risks
    • Competitors
    IT IS NOT ONLY ABOUT HACKERS
    http://www.enforcementtracker.com/
    

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12. “THE PROBLEM IS NOT ON OUR SIDE”
    

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13. STANDARDS
    Apple Platform
    Security Guide
    OWASP MASVS & MSTG
    OWASP SAMM
    MITRE CVE List
    NIST Standards
    OWASP Mobile Top 10
    

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14. OWASP MASVS
    MASVS (Mobile Application Security Verification Standard)
    
    • ARCHITECTURE, DESIGN AND THREAT MODELING
    • DATA STORAGE AND PRIVACY
    • CRYPTOGRAPHY
    • AUTHENTICATION AND SESSION MANAGEMENT
    • NETWORK COMMUNICATION
    • ENVIRONMENTAL INTERACTION
    • CODE QUALITY AND BUILD SETTINGS
    • RESILIENCY AGAINST REVERSE ENGINEERING
    https://github.com/OWASP/owasp-masvs
    

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15. MASVS V4
    Authentication and Session Management
    

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16. SECURE AUTHENTICATION – LEVEL 1 – BASICS
    • User authentication before accessing remote resources
    • Authentication is enforced by the remote endpoint
    • Secure session ID and access token
    • Access token should expire
    • Logout
    • Password policy
    • Throttling
    

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17. JWT TOKEN EXAMPLE
    https://jwt.io/
    

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19. LEVEL 2
    DEFENCE-IN-DEPTH
    

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20. OWASP MASVS 4.8
    BIOMETRIC AUTHENTICATION, IF ANY, IS NOT EVENT-BOUND (I.E. USING
    AN API THAT SIMPLY RETURNS "TRUE" OR "FALSE"). INSTEAD, IT IS
    BASED ON UNLOCKING THE KEYCHAIN.
    LEVEL 2
    BIOMETRICS UNLOCKING KEYCHAIN
    

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21. let reason = "Log in to your account"
    context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason ) { success, error in
    if success {
    // Move to the main thread because a state update triggers UI changes.
    DispatchQueue.main.async { [unowned self] in
    self.state = .loggedin
    }
    } else {
    print(error?.localizedDescription ?? "Failed to authenticate")
    // Fall back to a asking for username and password.
    // ...
    }
    }
    https://developer.apple.com/documentation/localauthentication/logging_a_user_into_your_app_with_face_id_or_touch_id
    

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22. let reason = "Log in to your account"
    context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason ) { success, error in
    if success {
    // Move to the main thread because a state update triggers UI changes.
    DispatchQueue.main.async { [unowned self] in
    self.state = .loggedin
    }
    } else {
    print(error?.localizedDescription ?? "Failed to authenticate")
    // Fall back to a asking for username and password.
    // ...
    }
    }
    https://developer.apple.com/documentation/localauthentication/logging_a_user_into_your_app_with_face_id_or_touch_id
    WARNING
    

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23. WHAT THE CODE LOOKS LIKE IN DISASSEMBLER?
    

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24. let access = SecAccessControlCreateWithFlags(nil, // Use the default allocator.
    kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly,
    .userPresence,
    nil) // Ignore any error.
    

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25. let access = SecAccessControlCreateWithFlags(nil, // Use the default allocator.
    kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly,
    .userPresence,
    nil) // Ignore any error.
    .biometryCurrentSet
    

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26. OWASP MASVS 4.9
    A SECOND FACTOR OF AUTHENTICATION EXISTS AT THE REMOTE
    ENDPOINT AND THE 2FA REQUIREMENT IS CONSISTENTLY ENFORCED.
    LEVEL 2
    2FA
    

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27. 2FA - TWO FACTOR AUTHENTICATION
    • Something you know (password, PIN, OTP)
    • Something you have (phone, SIM card, USB token)
    • Something you are, something physically unique for you (fingerprint)
    2SV - TWO STEP VERIFICATION
    AUTH FACTORS
    

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28. 2SV FLOW
    

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29. 2SV FLOW
    

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30. 2FA - TWO FACTOR AUTHENTICATION
    • Something you know (password, PIN, OTP)
    • Something you have (phone, SIM card, USB token)
    • Something you are, something physically unique for you (fingerprint)
    2SV - TWO STEP VERIFICATION
    AUTH FACTORS
    

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31. https://www.mayurpahwa.com/2019/01/digital-signature.html
    

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32. 2FA - TWO FACTOR AUTHENTICATION
    • Something you know (password, PIN, OTP)
    • Something you have (phone, SIM card, USB token)
    • Something you are, something physically unique for you (fingerprint)
    2SV - TWO STEP VERIFICATION
    AUTH FACTORS
    

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33. OWASP MASVS 4.10
    SENSITIVE TRANSACTIONS REQUIRE STEP-UP AUTHENTICATION.
    LEVEL 2
    STEP-UP AUTH
    

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34. OWASP MASVS 4.11
    THE APP INFORMS THE USER OF ALL LOGIN ACTIVITIES WITH THEIR
    ACCOUNT. USERS ARE ABLE VIEW A LIST OF DEVICES USED TO ACCESS
    THE ACCOUNT, AND TO BLOCK SPECIFIC DEVICES.
    LEVEL 2
    TRACK LOGIN ACTIVITY
    

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35. FINAL THOUGHTS
    

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36. WHERE TO GO NEXT
    OWASP MSTG – Testing Local Authentication
    https://github.com/OWASP/owasp-mstg/blob/master/Document/0x06f-Testing-Local-Authentication.md
    Apple Platform Security Guide
    https://support.apple.com/en-gb/guide/security/welcome/web
    WWDC 14 – Keychain and Authentication with Touch ID
    https://devstreaming-cdn.apple.com/videos/wwdc/
    2014/711xx6j5wzufu78/711/711_keychain_and_authentication_with_touch_id.pdf
    David Lindner – Don’t Touch Me That Way
    https://nvisium.com/blog/2016/06/22/dont-touch-me-that-way.html
    

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37. THANK YOU!
    @julepka
    

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