Subject: bug#22202: 24.5; SECURITY ISSUE -- Emacs Server vulnerable to random number generator attack on Windows systems

From: Richard Copley <[email-masked]>
Date: Thu, 31 Dec 2015 17:47:18 +0000

That last patch would still improve matters. The user would have
to be publishing the output of their PRNG to begin with in order
for the attacker to analyse it and guess the seed. (I don't know
how one could do that but that's no proof that it's impossible.)

What Demetri has just described is what I would do. (Sorry
again that I can't assist with a patch.)

+  if (w32_crypto_hprov)
+    w32_init_crypt_random ();

should be

+  if (! w32_crypto_hprov)
+    w32_init_crypt_random ();