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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 2 Aug 2017
      • Report Tweet
      • Report NetzDG Violation

      Samba on Linux with defaults is also vulnerable to SMBLoris because smbd forks for each client. Fix: "max smb processes = 1000" in smb.conf.pic.twitter.com/vA9XW16j8S

      10 replies 259 retweets 289 likes
    2. Hector Martin‏ @marcan42 2 Aug 2017
      • Report Tweet
      • Report NetzDG Violation
      Replying to @JennaMagius @drdaxxy @zerosum0x0

      For the record, my math was 18B Eth + 20B IP + 20B TCP = 58B, ×2 packets (SYN+ACK), +4 payload = 120 bytes/connection TX. RX would be ~½.

      2 replies 1 retweet 3 likes
    3. Hector Martin‏ @marcan42 2 Aug 2017
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      Replying to @marcan42 @JennaMagius and

      Also note that the Samba issue isn't due to the header, it's just general process memory overhead. You can exploit it w/o sending data.

      1 reply 2 retweets 2 likes
      Hector Martin‏ @marcan42 2 Aug 2017
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      Replying to @marcan42 @JennaMagius and

      Actually since you get an extra ACK for RX (though you can ignore it), RX would be about the same as TX in practice.

      10:46 AM - 2 Aug 2017
      • 1 Retweet
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      • cryptopotato
      0 replies 1 retweet 2 likes

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