Synopsis: Moderate: cyrus-imapd security update Issue Date: 2011-06-08 CVE Numbers: CVE-2011-1926 The cyrus-imapd packages contain a high-performance mail server with IMAP, POP3, NNTP, and Sieve support. It was discovered that cyrus-imapd did not flush the received commands buffer after switching to TLS encryption for IMAP, LMTP, NNTP, and POP3 sessions. A man-in-the-middle attacker could use this flaw to inject protocol commands into a victim's TLS session initialization messages. This could lead to those commands being processed by cyrus-imapd, potentially allowing the attacker to steal the victim's mail or authentication credentials. (CVE-2011-1926) Users of cyrus-imapd are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, cyrus-imapd will be restarted automatically. SL4: i386 cyrus-imapd-2.2.12-15.el4.i386.rpm cyrus-imapd-utils-2.2.12-15.el4.i386.rpm cyrus-imapd-nntp-2.2.12-15.el4.i386.rpm cyrus-imapd-murder-2.2.12-15.el4.i386.rpm perl-Cyrus-2.2.12-15.el4.i386.rpm cyrus-imapd-devel-2.2.12-15.el4.i386.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.i386.rpm x86_64 cyrus-imapd-devel-2.2.12-15.el4.x86_64.rpm cyrus-imapd-murder-2.2.12-15.el4.x86_64.rpm perl-Cyrus-2.2.12-15.el4.x86_64.rpm cyrus-imapd-nntp-2.2.12-15.el4.x86_64.rpm cyrus-imapd-2.2.12-15.el4.x86_64.rpm cyrus-imapd-utils-2.2.12-15.el4.x86_64.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.x86_64.rpm SL5: i386 cyrus-imapd-utils-2.3.7-7.el5_6.4.i386.rpm cyrus-imapd-2.3.7-7.el5_6.4.i386.rpm cyrus-imapd-devel-2.3.7-7.el5_6.4.i386.rpm cyrus-imapd-perl-2.3.7-7.el5_6.4.i386.rpm cyrus-imapd-debuginfo-2.3.7-7.el5_6.4.i386.rpm x86_64 cyrus-imapd-perl-2.3.7-7.el5_6.4.x86_64.rpm cyrus-imapd-utils-2.3.7-7.el5_6.4.x86_64.rpm cyrus-imapd-devel-2.3.7-7.el5_6.4.x86_64.rpm cyrus-imapd-devel-2.3.7-7.el5_6.4.i386.rpm cyrus-imapd-2.3.7-7.el5_6.4.x86_64.rpm cyrus-imapd-debuginfo-2.3.7-7.el5_6.4.x86_64.rpm cyrus-imapd-debuginfo-2.3.7-7.el5_6.4.i386.rpm SL6: i386 cyrus-imapd-utils-2.3.16-6.el6_1.2.i686.rpm cyrus-imapd-2.3.16-6.el6_1.2.i686.rpm cyrus-imapd-devel-2.3.16-6.el6_1.2.i686.rpm cyrus-imapd-debuginfo-2.3.16-6.el6_1.2.i686.rpm x86_64 cyrus-imapd-debuginfo-2.3.16-6.el6_1.2.i686.rpm cyrus-imapd-2.3.16-6.el6_1.2.x86_64.rpm cyrus-imapd-debuginfo-2.3.16-6.el6_1.2.x86_64.rpm cyrus-imapd-utils-2.3.16-6.el6_1.2.x86_64.rpm cyrus-imapd-devel-2.3.16-6.el6_1.2.x86_64.rpm cyrus-imapd-devel-2.3.16-6.el6_1.2.i686.rpm - Scientific Linux Development Team