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arturjanc's profile
Artur Janc
Artur Janc
Artur Janc
@arturjanc

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Artur Janc

@arturjanc

Making the web platform more secure one Twitter flamewar at a time.

Zurich, Switzerland
Joined February 2012

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    1. Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @slekies @mikewest

      If I set a flag to opt my app into a mode that prevents script execution via parser-based APIs, intent is fairly obvious

      1 reply 0 retweets 0 likes
    2. Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @arturjanc @slekies @mikewest

      It doesn't get much clearer than a flag that says 'stop-executing-scripts-added-via-parser-based-JS-apis'.

      1 reply 0 retweets 0 likes
    3. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
      Replying to @arturjanc @mikewest

      I think @slekies point is that developers will want both things. Like what happened with ng-csp. It's a valid point IMO

      1 reply 0 retweets 0 likes
    4. Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @sirdarckcat @mikewest @slekies

      If convenience damages security and developer explicitly chose security, libraries need to conform. Simple.

      1 reply 0 retweets 0 likes
    5. Sebastian Lekies‏ @slekies 28 Jan 2017
      Replying to @arturjanc @sirdarckcat @mikewest

      I was thinking more about the default behavior. But if security is inconvenient, no one will adopt it.

      2 replies 0 retweets 0 likes
    6. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
      Replying to @slekies @arturjanc @mikewest

      FWs will want to *work* when developers "turn on" security features. So they will work around them. Simple.

      1 reply 0 retweets 0 likes
    7. Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @sirdarckcat @slekies @mikewest

      And if they do they will be wrong, and detrimental to user security. Luckily it's a fixable problem.

      1 reply 0 retweets 1 like
    8. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
      Replying to @arturjanc @slekies @mikewest

      is ng-csp detrimental to user security?

      1 reply 0 retweets 0 likes
    9. Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @sirdarckcat @slekies @mikewest

      Yes, the Angular security model based on bypassing platform security features (via {{ }} and AST*) is wrong

      2 replies 0 retweets 1 like
    10. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
      Replying to @arturjanc @slekies @mikewest

      OK, and how would you have done ng-csp differently?

      1 reply 0 retweets 0 likes
      Artur Janc‏ @arturjanc 28 Jan 2017
      Replying to @sirdarckcat @slekies @mikewest

      I'll bite: if your JS FW bypasses platform restrictions you either fail closed or reimplement them yourself.

      1:28 PM - 28 Jan 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Artur Janc‏ @arturjanc 28 Jan 2017
          Replying to @arturjanc @sirdarckcat and

          So for Angular, just don't implement ASTInterpreter or require nonces/hashes for expressions.

          1 reply 0 retweets 0 likes
        3. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
          Replying to @arturjanc @slekies @mikewest

          If they hadn't implemented it, authors wouldn't have been able to use CSP. How is this different?

          1 reply 0 retweets 0 likes
        4. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
          Replying to @sirdarckcat @arturjanc and

          I don't think ng-csp did any "harm" to users. On the contrary, it allowed authors to adopt (a version of) CSP.

          3 replies 0 retweets 0 likes
        5. Artur Janc‏ @arturjanc 28 Jan 2017
          Replying to @sirdarckcat @slekies @mikewest

          Yeah, and this mentality of bypassing security mechanisms also gave us template injections.

          1 reply 0 retweets 0 likes
        6. Eduardo Vela‏ @sirdarckcat 28 Jan 2017
          Replying to @arturjanc @slekies @mikewest

          What? That makes no sense :-). Template Injections existed before ng-csp.

          1 reply 0 retweets 0 likes
        7. Artur Janc‏ @arturjanc 28 Jan 2017
          Replying to @sirdarckcat @slekies @mikewest

          It's just an example of how the approach of "let's make it work despite security restrictions" is harmful.

          2 replies 0 retweets 0 likes
        8. Artur Janc‏ @arturjanc 28 Jan 2017
          Replying to @arturjanc @sirdarckcat and

          Which brings us back to the point that bypassing security for "convenience" is an anti-pattern and must die.

          0 replies 0 retweets 0 likes
        9. End of conversation

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