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=========================================================== Ubuntu Security Notice USN-666-1 November 07, 2008 dovecot vulnerability CVE-2008-4907 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.10 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 8.10: dovecot-imapd 1:1.1.4-0ubuntu1.2 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that certain email headers were not correctly handled by Dovecot. If a remote attacker sent a specially crafted email to a user with a mailbox managed by Dovecot, that user's mailbox would become inaccessible through Dovecot, leading to a denial of service.