http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5775





------- Additional Comments From [EMAIL PROTECTED]  2008-01-09 15:09 -------
Maybe I'm missing something here (it does say this is a subtle issue), but ...  
sa-update doesn't care 
about signed keys, just that the key which signed the file is in the list of 
"trusted keys" as given to it.  
so cross-signing doesn't change anything for us.  Also:

"This does not mean that an attacker can issue signatures pretending to be 
someone else: the attacker 
cannot issue any signatures from that subkey, as all they have is the public 
half. The only thing this 
allows an attacker to do is to take an existing signature issued by a signing 
subkey, and claim that it 
was issued by the attacker's own key. The end result is that the signature can 
be verified by both the 
actual signer's key and the attacker's key."

So if an attacker can't fake the signature, then who cares?



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