Postfix 2.5 before 2.5.4 and 2.6 before 2.6-20080814 delivers to a mailbox file even when this file is not owned by the recipient, which allows local users to read e-mail messages by creating a mailbox file corresponding to another user’s account name.
ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/postfix-2.6-20080814.HISTORY
ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.5.4.HISTORY
kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
lists.opensuse.org/opensuse-security-announce/2008-08/msg00002.html
secunia.com/advisories/31477
secunia.com/advisories/31485
secunia.com/advisories/31500
secunia.com/advisories/32231
security.gentoo.org/glsa/glsa-200808-12.xml
wiki.rpath.com/Advisories:rPSA-2008-0259
www.mandriva.com/security/advisories?name=MDVSA-2009:224
www.redhat.com/support/errata/RHSA-2011-0422.html
www.securityfocus.com/archive/1/495632/100/0/threaded
www.securityfocus.com/bid/30691
www.vupen.com/english/advisories/2008/2385
exchange.xforce.ibmcloud.com/vulnerabilities/44461
issues.rpath.com/browse/RPL-2689
www.redhat.com/archives/fedora-package-announce/2008-October/msg00271.html
www.redhat.com/archives/fedora-package-announce/2008-October/msg00287.html