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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Rich Felker‏ @RichFelker Jan 29
      Replying to @revskills @jvehent

      Yeah but it's meaningless to non-mozilla-developers. WTF is a "chrome-privileged document"? Is the attack vector websites or browser extensions? Does attacker get host code exec or just some kind of priv bypass in the browser?

      2 replies 1 retweet 1 like
    2. Stephan Schmitz‏ @bext0n Jan 30
      Replying to @RichFelker @revskills @jvehent

      Well, "chrome privileged documents" simply refer to documents accessed via a chrome:// URL. Since websites can embed chrome resources, they can be used as an attack vector. Further info on Mozilla's Chrome system:https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/Tutorial/XUL_Structure …

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker Jan 30
      Replying to @bext0n @revskills @jvehent

      Wait, WHAT? How/why can sites embed chrome:// stuff?

      2 replies 0 retweets 0 likes
    4. Stephan Schmitz‏ @bext0n Jan 30
      Replying to @RichFelker @revskills @jvehent

      That's the key question. I'm still trying to grasp. But that is, what the statement by the German CERT says: https://www.cert-bund.de/advisoryshort/CB-K18-0193 …

      1 reply 0 retweets 1 like
      Rich Felker‏ @RichFelker Jan 30
      Replying to @bext0n @revskills @jvehent

      If that's actually possible, the flaws here are far deeper than this CVE.

      4:51 PM - 30 Jan 2018
      2 replies 0 retweets 0 likes
        1. Stephan Schmitz‏ @bext0n Jan 30
          Replying to @RichFelker @revskills @jvehent

          Valid chrome URLs should be maintained in a whitelist, which also holds the mapping to the corresponding file:// URL. I don't see (yet) how this could be tricked. Also, the commit doesn't look like _that_ is the case. In the other hand, CERT usualy know what they're talking about

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        1. Stephan Schmitz‏ @bext0n Jan 30
          Replying to @RichFelker @revskills @jvehent

          True.

          0 replies 0 retweets 0 likes
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