Scientific Linux Security Update : cyrus-imapd on SL4.x, SL5.x, SL6.x i386/x86_64

Medium Nessus Plugin ID 61063


The remote Scientific Linux host is missing one or more security updates.


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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 61063

File Name: sl_20110608_cyrus_imapd_on_SL4_x.nasl

Version: $Revision: 1.1 $

Type: local

Agent: unix

Published: 2012/08/01

Modified: 2012/08/01

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2011/06/08

Reference Information

CVE: CVE-2011-1926