Synopsis:    Moderate: dovecot security and enhancement update
Issue Date:  2011-05-19
CVE Numbers: CVE-2010-3707
              CVE-2010-3780


Dovecot is an IMAP server for Linux, UNIX, and similar operating 
systems, primarily written with security in mind.

A flaw was found in the way Dovecot handled SIGCHLD signals. If a large
amount of IMAP or POP3 session disconnects caused the Dovecot master
process to receive these signals rapidly, it could cause the master 
process to crash. (CVE-2010-3780)

A flaw was found in the way Dovecot processed multiple Access Control 
Lists (ACL) defined for a mailbox. In some cases, Dovecot could fail to 
apply the more specific ACL entry, possibly resulting in more access 
being granted to the user than intended. (CVE-2010-3707)

This update also adds the following enhancement:

* This erratum upgrades Dovecot to upstream version 2.0.9, providing
multiple fixes for the "dsync" utility and improving overall 
performance. Refer to the "/usr/share/doc/dovecot-2.0.9/ChangeLog" file 
after installing this update for further information about the changes. 
(BZ#637056)

Users of dovecot are advised to upgrade to these updated packages, which
resolve these issues and add this enhancement. After installing the 
updated packages, the dovecot service will be restarted automatically.

SL6
   i386:
      dovecot-2.0.9-2.el6.i686.rpm
      dovecot-mysql-2.0.9-2.el6.i686.rpm
      dovecot-pgsql-2.0.9-2.el6.i686.rpm
      dovecot-pigeonhole-2.0.9-2.el6.i686.rpm
      dovecot-devel-2.0.9-2.el6.i686.rpm
   x86_64:
      dovecot-2.0.9-2.el6.i686.rpm
      dovecot-2.0.9-2.el6.x86_64.rpm
      dovecot-mysql-2.0.9-2.el6.x86_64.rpm
      dovecot-pgsql-2.0.9-2.el6.x86_64.rpm
      dovecot-pigeonhole-2.0.9-2.el6.x86_64.rpm
      dovecot-devel-2.0.9-2.el6.x86_64.rpm

- Scientific Linux Development Team