Richard Levitte via RT wrote:
> Hmm, there's a problem that haven't been addressed at all by the 
> IETF.  SSLv3 contains the following as part of it's ciphersuite:
> 
>    The final cipher suites are for the FORTEZZA token.
> 
>      CipherSuite SSL_FORTEZZA_KEA_WITH_NULL_SHA         = { 
> 0X00,0X1C };
>      CipherSuite SSL_FORTEZZA_KEA_WITH_FORTEZZA_CBC_SHA = { 
> 0x00,0x1D };
>      CipherSuite SSL_FORTEZZA_KEA_WITH_RC4_128_SHA      = { 
> 0x00,0x1E };
> 
> Please note how the last one clashes with the first of the KRB5 
> suite.  Also, when one looks at RFC 2246 (TLS), there's this note at 
> the end of section A.5:

My understanding of the history is that the original SSLv3 spec only 
included the first two (see 
http://wp.netscape.com/eng/ssl3/4-APPN.HTM#A-6). A later version 
(http://wp.netscape.com/eng/ssl3/draft302.txt) added the third one, but 
that never made it into RFC2246 and escaped the attention of the authors 
of RFC2712.

As for a solution for OpenSSL, one option would be to disable 
(completely or in the default Kerberos enabled configuration) the 
ciphersuite 0x00 0x1E, which is only 56 bit DES anyway 
(TLS_KRB5_WITH_DES_CBC_SHA).

Andreas.

______________________________________________________________________
OpenSSL Project                                 http://www.openssl.org
Development Mailing List                       [EMAIL PROTECTED]
Automated List Manager                           [EMAIL PROTECTED]

Reply via email to