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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. SwiftOnSecurity‏ @SwiftOnSecurity Feb 13

      SwiftOnSecurity Retweeted @dietrich@mastodon.social

      Antivirus is always a good place to start on troubleshooting inexplicable delayshttps://twitter.com/dietrich/status/963470291824357376 …

      SwiftOnSecurity added,

      @dietrich@mastodon.social @dietrich
      Firefox: 100ms Firefox + Kaspersky: 14s https://bugzilla.mozilla.org/show_bug.cgi?id=1348361#c52 …
      13 replies 31 retweets 119 likes
    2. Rich Felker‏ @RichFelker Feb 13
      Replying to @SwiftOnSecurity

      See my favorite example:https://stackoverflow.com/questions/5924707/fwrite-chokes-on-xml-version/5924782#5924782 …

      1 reply 5 retweets 27 likes
    3. Vess‏ @VessOnSecurity Feb 14
      Replying to @RichFelker @SwiftOnSecurity

      This answer is another bunch of nonsense by someone who has no clue how AV works and why it does what it does. All the suggestions given in it are rubbish. There are very good reasons why AV programs don't do that.

      1 reply 1 retweet 3 likes
      Rich Felker‏ @RichFelker Feb 15
      Replying to @VessOnSecurity @SwiftOnSecurity

      I'll take that as a compliment I guess, but others might appreciate hearing your reasons.

      10:48 AM - 15 Feb 2018
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Vess‏ @VessOnSecurity Feb 15
          Replying to @RichFelker @SwiftOnSecurity

          Sigh... It wasn't a compliment, as I'm sure you know perfectly well. Somebody did try to explain in the comments why at least some of it is nonsense, but you didn't listen. OK, let's look at the suggestions one by one.

          1 reply 1 retweet 3 likes
        3. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          Advice #1: Scan only on transition between writing and reading. Well, sometimes a long time passes between these, you know. User unpacks a malicious archive and forgets about it. A month later he remembers and clicks on something - boom.

          3 replies 1 retweet 5 likes
        4. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          So, the scanner would have to keep some kind of journal of transactions - sometimes for months, because you can never be sure. How much space is that going to take? How much time to process it?

          2 replies 0 retweets 2 likes
        5. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          And in many cases most of the efforts to implement this will be wasted anyway. An executable that contains an icon as a resource could be read every time Explorer shows the directory.

          1 reply 0 retweets 3 likes
        6. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          In the good old times of MS-DOS you could easily hook execute-only - but in Windows, trying to run the file always involves read. And most people appreciate a warning that they are about to copy malware to the thumb drive they're going to give to a friend.

          1 reply 0 retweets 2 likes
        7. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          Advice #2: Scan once and never again until the file is modified. We've tried that. It doesn't work. It just involves additional unnecessary work to keep track of what was modified when.

          1 reply 0 retweets 1 like
        8. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          And what if, as you were explained in the comments, initially the scanner didn't catch the malware but now does? If you never re-scan, because the file didn't change, you're going to miss it permanently.

          3 replies 0 retweets 5 likes
        9. Vess‏ @VessOnSecurity Feb 15
          Replying to @VessOnSecurity @RichFelker @SwiftOnSecurity

          Advice #3: Scan only executable stuff. Well, duh. What do you think we're doing? Except the problem is, do you know how goddamned much is "executable", depending on the circumstances?

          1 reply 0 retweets 3 likes
        10. 15 more replies

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