Dumping Yahoo authentication secrets with an out-of-bounds read

scarybeastsecurity.blogspot.com

91 points by scarybeast 9 years ago · 7 comments

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smaili 9 years ago

For those wondering, this issue (referred to as YB2 or Yahoobleed #2 by the author) has already been fixed by Yahoo:

> Yahoo! fixed YB2 at the same time as YB1, by retiring ImageMagick.

scarybeastOP 9 years ago

FWIW, I've been very impressed with how Yahoo! handled this disclosure.
tyingq 9 years ago

Ouch. I have a site the generates images with ImageMagick based on user input. Guess I'm off to look for details.

This is YB (Yahoobleed) #2. You might also enjoy YB #1: "*bleed continues: 18 byte file, $14k bounty, for leaking private Yahoo! Mail images": https://scarybeastsecurity.blogspot.com/2017/05/bleed-contin...

mdani 9 years ago

What is pointer visualization?

logicallee 9 years ago

  Neo stares at the endlessly shifting river of
  information, bizarre codes and equations flowing across
  the face of the monitor.

  NEO
  Do you always look at it encoded?

  CYPHER
  Have to. You have no idea what the
  server is running - there's way too
  much information to decode the Yahoo.
  You get used to it, though.  Your brain
  does the translating.  I don't even
  see the code.  All I see is "pointer",
  "string  compare", "function call".
  You want a drink?

dom0 9 years ago

Interpreting memory as an image and suspecting that the memory contains a pointer.
https://googleprojectzero.blogspot.de/2014/08/what-does-poin...

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