Scientific Linux Security Update : dovecot on SL6.x i386/x86_64

Medium Nessus Plugin ID 65009


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


Two flaws were found in the way some settings were enforced by the script-login functionality of Dovecot. A remote, authenticated user could use these flaws to bypass intended access restrictions or conduct a directory traversal attack by leveraging login scripts.
(CVE-2011-2166, CVE-2011-2167)

A flaw was found in the way Dovecot performed remote server identity verification, when it was configured to proxy IMAP and POP3 connections to remote hosts using TLS/SSL protocols. A remote attacker could use this flaw to conduct man-in-the-middle attacks using an X.509 certificate issued by a trusted Certificate Authority (for a different name). (CVE-2011-4318)

This update also fixes the following bug :

- When a new user first accessed their IMAP inbox, Dovecot was, under some circumstances, unable to change the group ownership of the inbox directory in the user's Maildir location to match that of the user's mail spool (/var/mail/$USER). This correctly generated an 'Internal error occurred' message. However, with a subsequent attempt to access the inbox, Dovecot saw that the directory already existed and proceeded with its operation, leaving the directory with incorrectly set permissions. This update corrects the underlying permissions setting error. When a new user now accesses their inbox for the first time, and it is not possible to set group ownership, Dovecot removes the created directory and generates an error message instead of keeping the directory with incorrect group ownership.

After installing the updated packages, the dovecot service will be restarted automatically.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 65009

File Name: sl_20130221_dovecot_on_SL6_x.nasl

Version: $Revision: 1.1 $

Type: local

Agent: unix

Published: 2013/03/05

Modified: 2013/03/05

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:S/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: 2013/02/21

Reference Information

CVE: CVE-2011-2166, CVE-2011-2167, CVE-2011-4318