An exim security update is available for Red Hat Enterprise Linux 4

----------------------------------------------------------------------
Red Hat Security Advisory

Synopsis: Moderate: exim security update
Advisory ID: RHSA-2005:025-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2005-025.html
Issue date: 2005-02-15
Updated on: 2005-02-15
Product: Red Hat Enterprise Linux
CVE Names: CAN-2005-0021 CAN-2005-0022
----------------------------------------------------------------------

1. Summary:

Updated exim packages that resolve security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having moderate 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:

Exim is a mail transport agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

A buffer overflow was discovered in the spa_base64_to_bits function in Exim, as originally obtained from Samba code. If SPA authentication is enabled, a remote attacker may be able to exploit this vulnerability to execute arbitrary code as the 'exim' user. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0022 to this issue. Please note that SPA authentication is not enabled by default in Red Hat Enterprise Linux 4.

Buffer overflow flaws were discovered in the host_aton and dns_build_reverse functions in Exim. A local user can trigger these flaws by executing exim with carefully crafted command line arguments and may be able to gain the privileges of the 'exim' account. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0021 to this issue.

Users of Exim are advised to update to these erratum packages which contain backported patches to correct 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/):

144099 - CAN-2005-0021 exim security issues (CAN-2005-0022)

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/exim-4.43-1.RHEL4.3.src.rpm
a10f8ceafb030dd8de34dfe88479e2fd exim-4.43-1.RHEL4.3.src.rpm

i386:
953e48531b0c37fc6f61757fcf7f94ff exim-4.43-1.RHEL4.3.i386.rpm
b08043eb300a0c9ba8e7ebf0ec9f5ed9 exim-doc-4.43-1.RHEL4.3.i386.rpm
e5489e72dcfd31ab422f43327e7f4a25 exim-mon-4.43-1.RHEL4.3.i386.rpm
dd7df7b1937b40edc8e85e3368fa61ab exim-sa-4.43-1.RHEL4.3.i386.rpm

ia64:
3ca53a1ee343019a8681c61de01903e4 exim-4.43-1.RHEL4.3.ia64.rpm
5783878bf0fdf7eb62e299b59faa6841 exim-doc-4.43-1.RHEL4.3.ia64.rpm
551864772dc619dae8d8bcdb54eb98c8 exim-mon-4.43-1.RHEL4.3.ia64.rpm
a70d6117be6adb454d52996237a6d793 exim-sa-4.43-1.RHEL4.3.ia64.rpm

ppc:
839898ae13692a849bc44967d49ca323 exim-4.43-1.RHEL4.3.ppc.rpm
090ee7ef5efb7065f8e28e60c045f174 exim-doc-4.43-1.RHEL4.3.ppc.rpm
d14f71166fccc3430b5dc329149ad26b exim-mon-4.43-1.RHEL4.3.ppc.rpm
8e7aedae94f8b35f2020b90e3596d360 exim-sa-4.43-1.RHEL4.3.ppc.rpm

s390:
fc8c48abd7d386ad9451a1d8467716b8 exim-4.43-1.RHEL4.3.s390.rpm
c271ac458a358e66c246046c6d6caf66 exim-doc-4.43-1.RHEL4.3.s390.rpm
6384f141a2c1f720127724586dffa881 exim-mon-4.43-1.RHEL4.3.s390.rpm
6a98adae223421e131e4c656bd21c0da exim-sa-4.43-1.RHEL4.3.s390.rpm

s390x:
8c06e65bb46c3ad31dfa140b57184b6d exim-4.43-1.RHEL4.3.s390x.rpm
6f7ebfe85bcd5612ac9e1cedb2b9ffe4 exim-doc-4.43-1.RHEL4.3.s390x.rpm
ad1ca1dccbc96f16123a9defc5185e58 exim-mon-4.43-1.RHEL4.3.s390x.rpm
68b146dabe15178ebea73db4ddc16f03 exim-sa-4.43-1.RHEL4.3.s390x.rpm

x86_64:
6df49cc0a0e16121f82901f001237f57 exim-4.43-1.RHEL4.3.x86_64.rpm
7f4bed1a8742d92fd4b0b50b6fb00a27 exim-doc-4.43-1.RHEL4.3.x86_64.rpm
dfa83c2ee122e616aad216cd040de2f0 exim-mon-4.43-1.RHEL4.3.x86_64.rpm
9e698a46464a5aa565b592e3cdcd5ac2 exim-sa-4.43-1.RHEL4.3.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/exim-4.43-1.RHEL4.3.src.rpm
a10f8ceafb030dd8de34dfe88479e2fd exim-4.43-1.RHEL4.3.src.rpm

i386:
953e48531b0c37fc6f61757fcf7f94ff exim-4.43-1.RHEL4.3.i386.rpm
b08043eb300a0c9ba8e7ebf0ec9f5ed9 exim-doc-4.43-1.RHEL4.3.i386.rpm
e5489e72dcfd31ab422f43327e7f4a25 exim-mon-4.43-1.RHEL4.3.i386.rpm
dd7df7b1937b40edc8e85e3368fa61ab exim-sa-4.43-1.RHEL4.3.i386.rpm

x86_64:
6df49cc0a0e16121f82901f001237f57 exim-4.43-1.RHEL4.3.x86_64.rpm
7f4bed1a8742d92fd4b0b50b6fb00a27 exim-doc-4.43-1.RHEL4.3.x86_64.rpm
dfa83c2ee122e616aad216cd040de2f0 exim-mon-4.43-1.RHEL4.3.x86_64.rpm
9e698a46464a5aa565b592e3cdcd5ac2 exim-sa-4.43-1.RHEL4.3.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/exim-4.43-1.RHEL4.3.src.rpm
a10f8ceafb030dd8de34dfe88479e2fd exim-4.43-1.RHEL4.3.src.rpm

i386:
953e48531b0c37fc6f61757fcf7f94ff exim-4.43-1.RHEL4.3.i386.rpm
b08043eb300a0c9ba8e7ebf0ec9f5ed9 exim-doc-4.43-1.RHEL4.3.i386.rpm
e5489e72dcfd31ab422f43327e7f4a25 exim-mon-4.43-1.RHEL4.3.i386.rpm
dd7df7b1937b40edc8e85e3368fa61ab exim-sa-4.43-1.RHEL4.3.i386.rpm

ia64:
3ca53a1ee343019a8681c61de01903e4 exim-4.43-1.RHEL4.3.ia64.rpm
5783878bf0fdf7eb62e299b59faa6841 exim-doc-4.43-1.RHEL4.3.ia64.rpm
551864772dc619dae8d8bcdb54eb98c8 exim-mon-4.43-1.RHEL4.3.ia64.rpm
a70d6117be6adb454d52996237a6d793 exim-sa-4.43-1.RHEL4.3.ia64.rpm

x86_64:
6df49cc0a0e16121f82901f001237f57 exim-4.43-1.RHEL4.3.x86_64.rpm
7f4bed1a8742d92fd4b0b50b6fb00a27 exim-doc-4.43-1.RHEL4.3.x86_64.rpm
dfa83c2ee122e616aad216cd040de2f0 exim-mon-4.43-1.RHEL4.3.x86_64.rpm
9e698a46464a5aa565b592e3cdcd5ac2 exim-sa-4.43-1.RHEL4.3.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/exim-4.43-1.RHEL4.3.src.rpm
a10f8ceafb030dd8de34dfe88479e2fd exim-4.43-1.RHEL4.3.src.rpm

i386:
953e48531b0c37fc6f61757fcf7f94ff exim-4.43-1.RHEL4.3.i386.rpm
b08043eb300a0c9ba8e7ebf0ec9f5ed9 exim-doc-4.43-1.RHEL4.3.i386.rpm
e5489e72dcfd31ab422f43327e7f4a25 exim-mon-4.43-1.RHEL4.3.i386.rpm
dd7df7b1937b40edc8e85e3368fa61ab exim-sa-4.43-1.RHEL4.3.i386.rpm

ia64:
3ca53a1ee343019a8681c61de01903e4 exim-4.43-1.RHEL4.3.ia64.rpm
5783878bf0fdf7eb62e299b59faa6841 exim-doc-4.43-1.RHEL4.3.ia64.rpm
551864772dc619dae8d8bcdb54eb98c8 exim-mon-4.43-1.RHEL4.3.ia64.rpm
a70d6117be6adb454d52996237a6d793 exim-sa-4.43-1.RHEL4.3.ia64.rpm

x86_64:
6df49cc0a0e16121f82901f001237f57 exim-4.43-1.RHEL4.3.x86_64.rpm
7f4bed1a8742d92fd4b0b50b6fb00a27 exim-doc-4.43-1.RHEL4.3.x86_64.rpm
dfa83c2ee122e616aad216cd040de2f0 exim-mon-4.43-1.RHEL4.3.x86_64.rpm
9e698a46464a5aa565b592e3cdcd5ac2 exim-sa-4.43-1.RHEL4.3.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://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0021
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0022

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.