Dovecot 2.1.11 was released [1] and includes a fix for a crash condition when the IMAP server was issued a SEARCH command with multiple KEYWORD parameters. An authenticated remote user could use this flaw to crash Dovecot [2]. The upstream fix [3] was to remove the keyword merging code. This code does not exist in Dovecot 1.x, but it does affect 2.x versions, at least as far back as 2.0.9 (earliest version I checked). So Red Hat Enterprise Linux 5 is not affected by this flaw, but Red Hat Enterprise Linux 6 and Fedora are. [1] http://www.dovecot.org/list/dovecot-news/2012-November/000235.html [2] http://secunia.com/advisories/51455 [3] http://hg.dovecot.org/dovecot-2.1/rev/0306792cc843
Created dovecot tracking bugs for this issue Affects: fedora-all [bug 883067]
This has been assigned CVE-2012-5620: http://www.openwall.com/lists/oss-security/2012/12/04/4
This was filed a bit prematurely. As upstream indicates in the Debian bug report [1], a user can only crash their own session (self-DoS), which we would not consider a security flaw. [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695138#15 Statement: Red Hat does not consider this to be a security flaw as a user executing these commands will only succeed in preventing service to the current connection, and not to the server as a whole.