Perdition, the IMAP and POP proxy server, fails to apply the administrator's specified ciphersuite preferences when making outbound connections to IMAP and POP servers using STARTTLS. For these outbound connections, it applies the administrator's listening ciphersuite preferences, which in many cases may be significantly weaker.
This was first noted publicly on the debian BTS: http://bugs.debian.org/729028 All versions of perdition up to 2.0 appear to be affected, and the fix is a one-line patch. This is not a critical vulnerability (it can be mitigated, for example, by enforcing a strict minimalist ciphersuite on the backend server), but in the absence of any such mitigation, it may cause the connections between the proxy server and the backend server to negotiate a weaker ciphersuite than the administrator's stated intent. Could a CVE be issued for this issue? Thanks, --dkg
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