4.3 - RHSA-2007:0252

Problem Description:

Updated sendmail packages that fix a security issue and various bugs are now available for Red Hat Enterprise Linux 4.

This update has been rated as having low security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

Sendmail is a very widely used Mail Transport Agent (MTA). MTAs deliver mail from one machine to another. Sendmail is not a client program, but rather a behind-the-scenes daemon that moves email over networks or the Internet to its final destination.

The configuration of Sendmail on Red Hat Enterprise Linux was found to not reject the "localhost.localdomain" domain name for e-mail messages that came from external hosts. This could have allowed remote attackers to disguise spoofed messages (CVE-2006-7176).

This updated package also fixes the following bugs:

* Infinite loop within tls read.

* Incorrect path to selinuxenabled in initscript.

* Build artifacts from sendmail-cf package.

* Missing socketmap support.

* Add support for CipherList configuration directive.

* Path for aliases file.

* Failure of shutting down sm-client.

* Allows to specify persistent queue runners.

* Missing dnl for SMART_HOST define.

* Fixes connections stay in CLOSE_WAIT.

All users of Sendmail should upgrade to these updated packages, which contains backported patches to resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released errata relevant to your system have been applied. Use Red Hat Network to download and update your packages. To launch the Red Hat Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the following Web page for the System Administration or Customization guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

5. Bug IDs fixed (http://bugzilla.redhat.com/):

121850 - [PATCH] infinite loop within tls_read 152282 - Incorrect path to selinuxenabled in /etc/init.d/sendmail 152955 - sendmail-cf contains rpm build artifacts 156191 - Changelog says 'Socketmap Supported' but it's not compiled in. 166744 - aliases man page specifies incorrect location of aliases file 171838 - CVE-2006-7176 sendmail allows external mail with from address xxx@localhost.localdomain 172352 - Sendmail allows SSLv2 during STARTTLS, and the CipherList config option isn't supported so you can't turn it off 200920 - shutting down sm-client fails 200921 - [PATCH] method to specify persistent queue runners? 200923 - sendmail.mc missing dnl on SMART_HOST define