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=========================================================== Ubuntu Security Notice USN-487-1 July 17, 2007 dovecot vulnerability CVE-2007-2231 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 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 6.06 LTS: dovecot-common 1.0.beta3-3ubuntu5.5 Ubuntu 6.10: dovecot-common 1.0.rc2-1ubuntu2.2 Ubuntu 7.04: dovecot-common 1.0.rc17-1ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that Dovecot, when configured to use non-system-user spools and compressed folders, would allow directory traversals in mailbox names. Remote authenticated users could potentially read email owned by other users.