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=========================================================== Ubuntu Security Notice USN-405-1 January 11, 2007 fetchmail vulnerability CVE-2006-5867 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.10 Ubuntu 6.06 LTS Ubuntu 6.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 5.10: fetchmail 6.2.5-13ubuntu3.3 Ubuntu 6.06 LTS: fetchmail 6.3.2-2ubuntu2.1 Ubuntu 6.10: fetchmail 6.3.4-1ubuntu4.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that fetchmail did not correctly require TLS negotiation in certain situations. This would result in a user's unencrypted password being sent across the network. If fetchmail has been configured to use the "sslproto tls1", "sslcertck", or "sslfingerprint" options with a server that does not correctly support TLS negotiation, this update may cause fetchmail to (correctly) abort authentication.