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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                     ESB-2002.707 -- RHSA-2002:293-09
           Updated Fetchmail packages fix security vulnerability
                             18 December 2002

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                Fetchmail
Vendor:                 Red Hat
Operating System:       Red Hat Linux 6.2
                        Red Hat Linux 7.0
                        Red Hat Linux 7.1
                        Red Hat Linux 7.2
                        Red Hat Linux 7.3
                        Red Hat Linux 8.0
Platform:               i386
                        IA-64
Impact:                 Execute Arbitrary Code/Commands
Access Required:        Remote

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- ---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated Fetchmail packages fix security vulnerability
Advisory ID:       RHSA-2002:293-09
Issue date:        2002-12-16
Updated on:        2002-12-17
Product:           Red Hat Linux
Keywords:          flaw:buf fetchmail
Cross references:  
Obsoletes:         RHSA-2002:215
CVE Names:         CAN-2002-1365
- ---------------------------------------------------------------------

1. Topic:

Updated Fetchmail packages are available for Red Hat Linux versions 6.2, 7,
7.1, 7.2, 7.3, and 8.0 which close a remotely-exploitable vulnerability in
unpatched versions of Fetchmail prior to 6.2.0.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - i386
Red Hat Linux 7.0 - i386
Red Hat Linux 7.1 - i386
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386

3. Problem description:

Fetchmail is a remote mail retrieval and forwarding utility intended for
use over on-demand TCP/IP links such as SLIP and PPP connections.  A bug
has been found in the header parsing code in versions of Fetchmail prior
to 6.2.0.  

This bug allows a remote attacker to crash Fetchmail and potentially
execute arbitrary code by sending a carefully crafted email which is 
then parsed by Fetchmail.

All users of Fetchmail are advised to upgrade to the errata packages
containing a backported fix which corrects 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 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.

5. RPMs required:

Red Hat Linux 6.2:

SRPMS:
ftp://updates.redhat.com/6.2/en/os/SRPMS/fetchmail-5.9.0-21.6.2.src.rpm

i386:
ftp://updates.redhat.com/6.2/en/os/i386/fetchmail-5.9.0-21.6.2.i386.rpm
ftp://updates.redhat.com/6.2/en/os/i386/fetchmailconf-5.9.0-21.6.2.i386.rpm

Red Hat Linux 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/en/os/SRPMS/fetchmail-5.9.0-21.7.1.src.rpm

i386:
ftp://updates.redhat.com/7.0/en/os/i386/fetchmail-5.9.0-21.7.1.i386.rpm
ftp://updates.redhat.com/7.0/en/os/i386/fetchmailconf-5.9.0-21.7.1.i386.rpm

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/fetchmail-5.9.0-21.7.1.src.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/fetchmail-5.9.0-21.7.1.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/fetchmailconf-5.9.0-21.7.1.i386.rpm

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/fetchmail-5.9.0-21.7.3.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/fetchmail-5.9.0-21.7.3.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/fetchmailconf-5.9.0-21.7.3.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/fetchmail-5.9.0-21.7.3.ia64.rpm
ftp://updates.redhat.com/7.2/en/os/ia64/fetchmailconf-5.9.0-21.7.3.ia64.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/fetchmail-5.9.0-21.7.3.src.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/fetchmail-5.9.0-21.7.3.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/fetchmailconf-5.9.0-21.7.3.i386.rpm

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/fetchmail-5.9.0-21.8.0.src.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/fetchmail-5.9.0-21.8.0.i386.rpm



6. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------
f7697a08603fa76430178a091fa85888 6.2/en/os/SRPMS/fetchmail-5.9.0-21.6.2.src.rpm
4a70148fbd89e8ecbca3b5a3749f8e43 6.2/en/os/i386/fetchmail-5.9.0-21.6.2.i386.rpm
4d3183bcfd8d98d38e6b49a8d8b8e775 6.2/en/os/i386/fetchmailconf-5.9.0-21.6.2.i386.rpm
9b976c0c149a670b871cc776f8157753 7.0/en/os/SRPMS/fetchmail-5.9.0-21.7.1.src.rpm
69b8889f32b1270a47635f1d014618d4 7.0/en/os/i386/fetchmail-5.9.0-21.7.1.i386.rpm
c66f7d8182710f5feed6f986823c740f 7.0/en/os/i386/fetchmailconf-5.9.0-21.7.1.i386.rpm
9b976c0c149a670b871cc776f8157753 7.1/en/os/SRPMS/fetchmail-5.9.0-21.7.1.src.rpm
69b8889f32b1270a47635f1d014618d4 7.1/en/os/i386/fetchmail-5.9.0-21.7.1.i386.rpm
c66f7d8182710f5feed6f986823c740f 7.1/en/os/i386/fetchmailconf-5.9.0-21.7.1.i386.rpm
a07458a29e29b47eac235a87fcb5ffce 7.2/en/os/SRPMS/fetchmail-5.9.0-21.7.3.src.rpm
3b28556558f81954634d207e4d96bfc8 7.2/en/os/i386/fetchmail-5.9.0-21.7.3.i386.rpm
fd680276bae4dd8695f56ac754515be2 7.2/en/os/i386/fetchmailconf-5.9.0-21.7.3.i386.rpm
ed9ca9ad44b836ee14a6fcb8e2df1798 7.2/en/os/ia64/fetchmail-5.9.0-21.7.3.ia64.rpm
c6f417b671cec43314f81fca18caa512 7.2/en/os/ia64/fetchmailconf-5.9.0-21.7.3.ia64.rpm
a07458a29e29b47eac235a87fcb5ffce 7.3/en/os/SRPMS/fetchmail-5.9.0-21.7.3.src.rpm
3b28556558f81954634d207e4d96bfc8 7.3/en/os/i386/fetchmail-5.9.0-21.7.3.i386.rpm
fd680276bae4dd8695f56ac754515be2 7.3/en/os/i386/fetchmailconf-5.9.0-21.7.3.i386.rpm
122f71743704320e5ec54347909e9079 8.0/en/os/SRPMS/fetchmail-5.9.0-21.8.0.src.rpm
a6098fae36da8f690d7be1dfc62833fc 8.0/en/os/i386/fetchmail-5.9.0-21.8.0.i386.rpm


These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at http://www.redhat.com/about/contact/pgpkey.html

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 md5sum with the following command:
    
    md5sum <filename>


7. References:

http://tuxedo.org/~esr/fetchmail/NEWS
http://security.e-matters.de/advisories/052002.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1365

8. Contact:

The Red Hat security contact is <security@redhat.com>.  More contact
details at http://www.redhat.com/solutions/security/news/contact.html

Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

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