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Date: Thu, 12 May 2005 20:34:02 -0400
Subject: [FLSA-2005:152912] Updated imap packages fix security issues

               Fedora Legacy Update Advisory

Synopsis:          Updated imap packages fix security issues
Advisory ID:       FLSA:152912
Issue date:        2005-05-12
Product:           Red Hat Linux, Fedora Core
Keywords:          Bugfix
CVE Names:         CAN-2003-0297 CAN-2005-0198

1. Topic:

Updated imap packages that fix security issues are now available.

The imap package provides server daemons for both the IMAP (Internet
Message Access Protocol) and POP (Post Office Protocol) mail access

2. Relevant releases/architectures:

Red Hat Linux 7.3 - i386
Red Hat Linux 9 - i386
Fedora Core 1 - i386

3. Problem description:

A buffer overflow flaw was found in the c-client IMAP client. An attacker
could create a malicious IMAP server that if connected to by a victim could
execute arbitrary code on the client machine. The Common Vulnerabilities
and Exposures project ( has assigned the name CAN-2003-0297
to this issue.

A logic error in the CRAM-MD5 code in the University of Washington IMAP
(UW-IMAP) server was discovered. When Challenge-Response Authentication
Mechanism with MD5 (CRAM-MD5) is enabled, UW-IMAP does not properly enforce
all the required conditions for successful authentication, which could
allow remote attackers to authenticate as arbitrary users. The Common
Vulnerabilities and Exposures project ( has assigned the name
CAN-2005-0198 to this issue.

Users of imap are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which
are not installed but included in the list will not be updated.  Note
that you can also use wildcards (*.rpm) if your current directory *only*
contains the desired RPMs.

Please note that this update is also available via yum and apt.  Many
people find this an easier way to apply updates.  To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the
appropriate RPMs being upgraded on your system.  This assumes that you
have yum or apt-get configured for obtaining Fedora Legacy content.
Please visit for directions on how to
configure yum and apt-get.

5. Bug IDs fixed:

6. RPMs required:

Red Hat Linux 7.3:


Red Hat Linux 9:



Fedora Core 1:



7. Verification:

SHA1 sum                                 Package Name


These packages are GPG signed by Fedora Legacy for security.  Our key is
available from

You can verify each package with the following command:

    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the sha1sum with the following command:

    sha1sum <filename>

8. References:

9. Contact:

The Fedora Legacy security contact is <>. More
project details at


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