Date: Mon, 23 Nov 2009 13:57:27 -0500 (EST) From: Josh Bressers <bressers@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: CVE request: v1.2.8 released to fix the 0777 base_dir creation issue Please use CVE-2009-3897 for this. Thanks. -- JB ----- "Thomas Biege" <thomas@...e.de> wrote: > Hello. > > http://www.dovecot.org/list/dovecot-news/2009-November/000143.html > > http://dovecot.org/releases/1.2/dovecot-1.2.8.tar.gz > http://dovecot.org/releases/1.2/dovecot-1.2.8.tar.gz.sig > > This is mainly to fix the 0777 base_dir creation issue, which could > be > considered a security hole, exploitable by local users. An attacker > could for example replace Dovecot's auth socket and log in as other > users. Gaining root privileges isn't possible though. > > This affects only v1.2 users, v1.1 and older versions were creating > the > directory with 0755 permission. > > If your Dovecot's base_dir isn't in /var/run/dovecot/, you should > also > make sure that the $prefix/var/ and $prefix/var/run/ > (i.e. /usr/local/var/, /usr/local/var/run/ by default) aren't 0777. > > * Dovecot v1.2.x had been creating base_dir (and its parents if > necessary) with 0777 permissions. The base_dir's permissions get > changed to 0755 automatically at startup, but you may need to > chmod the parent directories manually. > > - acl: If user has rights from more than one group, merge them > instead > of choosing one group's rights and ignoring others. > - virtual: When using a lot of mailboxes, the virtual mailbox's > header > could have grown over 32 kB and caused "out of memory" crashes. > Also > over 64 kB headers couldn't even be updated with existing > transaction > log records. Added a new record type that gets used with >=64 kB > headers. Older Dovecot versions don't understand this header and > will log errors if they see it. > - FETCH BODYSTRUCTURE didn't return RFC 2231 "key*" fields correctly > > > -- > Bye, > Thomas > -- > Thomas Biege <thomas@...e.de>, SUSE LINUX, Security Support & > Auditing > SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nuernberg) > -- > Wer aufhoert besser werden zu wollen, hoert auf gut zu sein. > -- Marie von Ebner-Eschenbach
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