Updated sendmail packages that fix a security issue and various bugs are now
available for CentOS Linux 4.
This update has been rated as having low security impact by the CentOS
Security Response Team.
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 CentOS 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.