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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. ( 🎃 *) saleem‏ @spudowiar Apr 5

      ( 🎃 *) saleem Retweeted Rich Felker

      I only apply patches with Git (because it's just easier!) which was why this didn't execute on my system. I spotted this on Tuesday but didn't mention it because I thought it was yet another part of the joke :/https://twitter.com/RichFelker/status/981923832654163968 …

      ( 🎃 *) saleem added,

      Rich Felker @RichFelker
      "patch calls ed. Ed calls sh. Arbitrary command execution through unreviewed patches." https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=894667 … <-- Somebody needs to submit a bug against GNU patch if it does that.
      Show this thread
      2 replies 0 retweets 5 likes
      Show this thread
    2. ( 🎃 *) saleem‏ @spudowiar Apr 5

      ( 🎃 *) saleem Retweeted ( 🎃 *) saleem

      There we go, attempted code executionhttps://twitter.com/spudowiar/status/981931409362358272 …

      ( 🎃 *) saleem added,

      ( 🎃 *) saleem @spudowiar
      Replying to @spudowiar @RichFelker
      With GNU Patch 2.7.6 pic.twitter.com/oVXNa4IeOg
      1 reply 0 retweets 1 like
      Show this thread
    3. ( 🎃 *) saleem‏ @spudowiar Apr 5

      I've submitted a bug report on GNU Patch @RichFelker @peterktodd http://savannah.gnu.org/bugs/index.php?53566 … I used `GNU quoting' in the hope that would make people take me more seriously ;)

      1 reply 2 retweets 9 likes
      Show this thread
    4. Rich Felker‏ @RichFelker Apr 5
      Replying to @spudowiar @peterktodd

      I doubt real-world ed implementations are safe even with the -r option. They probably have all sorts of integer overflows and buffer overflows leading to arbitrary code exec, because they're unused (except by @ed1conf extremists ;-) and unaudited.

      5 replies 2 retweets 3 likes
    5. Anthony Howe‏ @SirWumpus Apr 5
      Replying to @RichFelker @spudowiar and

      I recall the MKS ed (1990s) was eight bit clean and was reviewed again when the i18n support was added. I'd be surprised if GNU ed or other OS versions had such mistakes. An ed impl. isn't rocket science compared to vi.

      2 replies 0 retweets 0 likes
    6. Rich Felker‏ @RichFelker Apr 5
      Replying to @SirWumpus @spudowiar and

      Being "8-bit clean" doesn't have much to do with whether it's using the wrong types for buffer size/position arithmetic and allocations... These kinds of errors are extremely common in old codebases.

      1 reply 0 retweets 1 like
      Rich Felker‏ @RichFelker Apr 5
      Replying to @RichFelker @SirWumpus and

      So much code uses int where it means/needs size_t, and performs arithmetic on sizes and positions without first checking for overflow.

      10:49 AM - 5 Apr 2018
      • 1 Like
      • Peter Todd
      1 reply 0 retweets 1 like
        1. New conversation
        2. Anthony Howe‏ @SirWumpus Apr 5
          Replying to @RichFelker @spudowiar and

          I know. I've written an editor or two in C in the past. Lots of potential gotchas. But those pitfalls are not exclusive old code; lots of new code too, like prototypes that then become full projects can often make those mistakes.

          1 reply 0 retweets 1 like
        3. ( 🎃 *) saleem‏ @spudowiar Apr 5
          Replying to @SirWumpus @RichFelker and

          Rewrite it in Rust *ducks for cover*

          1 reply 0 retweets 2 likes
        4. Anthony Howe‏ @SirWumpus Apr 5
          Replying to @spudowiar @RichFelker and

          I just might. I've been learning Rust in recent months. I like it has no NULL.

          0 replies 0 retweets 1 like
        5. End of conversation

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