Re: DSA/DSS keys and DSA 1576-1/CVE-2008-0166.

2008-05-15 Thread Mario 'BitKoenig' Holbe
On Thu, May 15, 2008 at 10:37:37AM +1000, Andrew McGlashan wrote: > Okay, if we updated (on stable): > openssl_0.9.8c-4etch3_i386.deb > libssl0.9.8_0.9.8c-4etch3_i386.deb > Then re-generated all keys and certificates. Then you are fine. > Later we get these updates: > openssh-server_1%3a4.3p2

Re: DSA/DSS keys and DSA 1576-1/CVE-2008-0166.

2008-05-14 Thread Mario 'BitKoenig' Holbe
Mario 'BitKoenig' Holbe <[EMAIL PROTECTED]> wrote: > ssh-dss.c:ssh_dss_sign() calls openssh's DSA_do_sign() which finally ^ openssl's, of course. regards Mario -- The social dynamics of the net are a direct consequence of the fact that nobody has yet d

Re: DSA/DSS keys and DSA 1576-1/CVE-2008-0166.

2008-05-14 Thread Andrew McGlashan
Hi, Mario 'BitKoenig' Holbe wrote: Kurt Roeckx <[EMAIL PROTECTED]> wrote: So my question is, does either the ssh client or server use openssl to generate the random number used to sign? Yes, they both do. ssh-dss.c:ssh_dss_sign() calls openssh's DSA_do_sign() which finally goes down to ssleay

Re: DSA/DSS keys and DSA 1576-1/CVE-2008-0166.

2008-05-14 Thread Mario 'BitKoenig' Holbe
Kurt Roeckx <[EMAIL PROTECTED]> wrote: > So my question is, does either the ssh client or server use openssl to > generate the random number used to sign? Yes, they both do. ssh-dss.c:ssh_dss_sign() calls openssh's DSA_do_sign() which finally goes down to ssleay_rand_add() (via dsa_sign_setup()->B

DSA/DSS keys and DSA 1576-1/CVE-2008-0166.

2008-05-14 Thread Kurt Roeckx
There seems to be some confusion going around about the effect of the openssl issue on dsa keys. >From what I understand, when using a DSA key and the random number used to generate a signature is known, predictable, or used twice the private key can be calculated. So it seem to me that if a DSA