Real World Exploit for Bleichenbachers Attack on SSL fromCrypto'06 working

Erik Tews e_tews at cdc.informatik.tu-darmstadt.de
Fri Sep 15 02:02:12 EDT 2006


Am Donnerstag, den 14.09.2006, 22:23 -0700 schrieb Tolga Acar:
> You need to have one zero octet after bunch of FFs and before DER encoded
> has blob in order to have a proper PKCS#1v1.5 signature encoding.
> 
> Based on what you say below, "I used this cert and my key to sign an
> end-entity certificate which I used to set up an webserver", it appears that
> implementations you used don't check for this one zero octet, either.

Yes, I have, I counted this to the ASN1DataWithHash part. I did not
theck if it works without.
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