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

smaili · on May 20, 2017

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.

scarybeast · on May 20, 2017

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

tyingq · on May 20, 2017

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

scarybeast · on May 20, 2017

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 · on May 20, 2017

What is pointer visualization?

logicallee · on May 20, 2017

  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 · on May 20, 2017

Interpreting memory as an image and suspecting that the memory contains a pointer.

https://googleprojectzero.blogspot.de/2014/08/what-does-poin...