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                   Red Hat Security Advisory

Synopsis:          Low: postfix security update
Advisory ID:       RHSA-2005:152-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-152.html
Issue date:        2005-03-16
Updated on:        2005-03-16
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2005-0337
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1. Summary:

Updated postfix packages that include a security fix and two other bug
fixes 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:

Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),
and TLS.

A flaw was found in the ipv6 patch used with Postfix.  When the file
/proc/net/if_inet6 is not available and permit_mx_backup is enabled in
smtpd_recipient_restrictions, this flaw could allow remote attackers to
bypass e-mail restrictions and perform mail relaying by sending mail to an
IPv6 hostname.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2005-0337 to this issue.

These updated packages also fix the following problems:

- wrong permissions on doc directory
- segfault when gethostbyname or gethostbyaddr fails

All users of postfix should upgrade to these updated packages, which
contain patches which resolve these issues.

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 Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate.  The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

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

146732 - CAN-2005-0337 open relay bug in postfix ipv6 patch
147280 - Permissions on doc directory is wrong
139983 - newaliases segfaults when gethostbyname or gethostbyaddr fails

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
postfix-2.1.5-4.2.RHEL4.src.rpm
6cb38ee879fcbf2c2790890e49dd1a4b  postfix-2.1.5-4.2.RHEL4.src.rpm

i386:
986882612b24197ca6a962e2e863dba7  postfix-2.1.5-4.2.RHEL4.i386.rpm
1dc80db9e883731d25f3783fa47dccd8  postfix-pflogsumm-2.1.5-4.2.RHEL4.i386.rpm

ia64:
01c0c0432414d34d774b6d118e8fd93c  postfix-2.1.5-4.2.RHEL4.ia64.rpm
3a07219a527596c4719cb971aa54aa38  postfix-pflogsumm-2.1.5-4.2.RHEL4.ia64.rpm

ppc:
6eb2d7a742a0684b0031ea30843fd8ac  postfix-2.1.5-4.2.RHEL4.ppc.rpm
f15d4f4e2823befcbdf5e913182c592a  postfix-pflogsumm-2.1.5-4.2.RHEL4.ppc.rpm

s390:
915feb7be6d01186fb61d1664d5714a7  postfix-2.1.5-4.2.RHEL4.s390.rpm
96202b25b1775f7fd1a96077354ebf72  postfix-pflogsumm-2.1.5-4.2.RHEL4.s390.rpm

s390x:
fbb35e5cb15347ffaa68cdad954683d0  postfix-2.1.5-4.2.RHEL4.s390x.rpm
aeb220b7e428f560e6cad87f367fd8ff  postfix-pflogsumm-2.1.5-4.2.RHEL4.s390x.rpm

x86_64:
365c57d129da99b56ba8d54b73539c89  postfix-2.1.5-4.2.RHEL4.x86_64.rpm
3a39dc000dd43d57144da89450accfbe  postfix-pflogsumm-2.1.5-4.2.RHEL4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
postfix-2.1.5-4.2.RHEL4.src.rpm
6cb38ee879fcbf2c2790890e49dd1a4b  postfix-2.1.5-4.2.RHEL4.src.rpm

i386:
986882612b24197ca6a962e2e863dba7  postfix-2.1.5-4.2.RHEL4.i386.rpm
1dc80db9e883731d25f3783fa47dccd8  postfix-pflogsumm-2.1.5-4.2.RHEL4.i386.rpm

x86_64:
365c57d129da99b56ba8d54b73539c89  postfix-2.1.5-4.2.RHEL4.x86_64.rpm
3a39dc000dd43d57144da89450accfbe  postfix-pflogsumm-2.1.5-4.2.RHEL4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
postfix-2.1.5-4.2.RHEL4.src.rpm
6cb38ee879fcbf2c2790890e49dd1a4b  postfix-2.1.5-4.2.RHEL4.src.rpm

i386:
986882612b24197ca6a962e2e863dba7  postfix-2.1.5-4.2.RHEL4.i386.rpm
1dc80db9e883731d25f3783fa47dccd8  postfix-pflogsumm-2.1.5-4.2.RHEL4.i386.rpm

ia64:
01c0c0432414d34d774b6d118e8fd93c  postfix-2.1.5-4.2.RHEL4.ia64.rpm
3a07219a527596c4719cb971aa54aa38  postfix-pflogsumm-2.1.5-4.2.RHEL4.ia64.rpm

x86_64:
365c57d129da99b56ba8d54b73539c89  postfix-2.1.5-4.2.RHEL4.x86_64.rpm
3a39dc000dd43d57144da89450accfbe  postfix-pflogsumm-2.1.5-4.2.RHEL4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
postfix-2.1.5-4.2.RHEL4.src.rpm
6cb38ee879fcbf2c2790890e49dd1a4b  postfix-2.1.5-4.2.RHEL4.src.rpm

i386:
986882612b24197ca6a962e2e863dba7  postfix-2.1.5-4.2.RHEL4.i386.rpm
1dc80db9e883731d25f3783fa47dccd8  postfix-pflogsumm-2.1.5-4.2.RHEL4.i386.rpm

ia64:
01c0c0432414d34d774b6d118e8fd93c  postfix-2.1.5-4.2.RHEL4.ia64.rpm
3a07219a527596c4719cb971aa54aa38  postfix-pflogsumm-2.1.5-4.2.RHEL4.ia64.rpm

x86_64:
365c57d129da99b56ba8d54b73539c89  postfix-2.1.5-4.2.RHEL4.x86_64.rpm
3a39dc000dd43d57144da89450accfbe  postfix-pflogsumm-2.1.5-4.2.RHEL4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0337

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.

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