Samba releases prior to 3.0.25 have been found to be remotely root-exploitable by a combination of vulnerabilities: CVE-2007-2444, CVE-2007-2446, CVE-2007-2447. All Samba 3.x users should upgrade to the 3.0.25 release immediately.
Download the Samba-3.0.25 source here (tarball signature here).
(Note that while Samba 4.0.0 Technology Preview 4 is available for download, it is not yet ready for production.)
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