Red Hat Linux Security Advisory
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Synopsis	New mutt packages fix IMAP vulnerability/incompatibility

Advisory ID	RHSA-2001:029-02

Issue Date	2001-03-09

Updated On	2001-03-13

Product	Red Hat Linux

Keywords	mutt IMAP format string GSSAPI

Cross References

Obsoletes

1. Topic:

New mutt packages are available. These packages fix an
instance of the common 'format string' vulnerability,
and correct an incompatibilty with the current errata
IMAP server.

It is recommended that all mutt users using Red Hat Linux
upgrade to the new packages. The version of mutt shipped
in Red Hat Linux 7.0 does not contain the format string
vulnerability; it is merely a bugfix update.

Users of Red Hat Linux 6.0 and 6.1 should use the
packages for Red Hat Linux 6.2. Additionally, the packages
for Red Hat Linux 6.2 have support for SSL-IMAP and GSSAPI; the
new packages require the openssl enhancement errata.

2. Problem description:

An example of a 'format string' vulnerability was present in the
IMAP code in versions of mutt previous to 1.2.5. This had the
effect that a compromised or malicious IMAP server could possibly
execute code on the local machine.

The mutt packages in Red Hat Linux 7.0 were incompatible
with the errata IMAP server released for Red Hat Linux in
regards to GSSAPI authentication.

3. Bug IDs fixed: (see bugzilla for more information)

19326 - Updated version of Mutt (1.2) has IMAP security hole fixed

4. Relevant releases/architectures:

Red Hat Linux 5.2 - alpha, i386, sparc
Red Hat Linux 6.2 - alpha, i386, sparc
Red Hat Linux 7.0 - alpha, i386

5. RPMs required:

6. Solution:

To update all RPMs for your particular architecture, run:

rpm -Fvh

where 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 directly *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.

7. Verification:

MD5 sum                           Package Name
-------------------------------------------------------------------------
3ee2c329af45ffa655033498df170d7d  5.2/en/os/SRPMS/mutt-1.2.5i-8.5.src.rpm
e51c9d9f1477e85a09b5f24086330099  5.2/en/os/alpha/mutt-1.2.5i-8.5.alpha.rpm
04dc128f557c060e6bca0a8d22bf2f95  5.2/en/os/i386/mutt-1.2.5i-8.5.i386.rpm
1236d1b376b493810cec113c108ac039  5.2/en/os/sparc/mutt-1.2.5i-8.5.sparc.rpm
a14943ad1aa6fa508a9008ce72df0ccf  6.2/en/os/SRPMS/mutt-1.2.5i-8.6.src.rpm
be6d299c37243967b4965562a542f583  6.2/en/os/alpha/mutt-1.2.5i-8.6.alpha.rpm
362d9fcec4018f1c59ef43be0a276807  6.2/en/os/i386/mutt-1.2.5i-8.6.i386.rpm
003e1a1a237e71f009e6425488b043d6  6.2/en/os/sparc/mutt-1.2.5i-8.6.sparc.rpm
909998195c995035deccf48fc6139bb6  7.0/en/os/SRPMS/mutt-1.2.5i-8.7.src.rpm
5c0775e332e70df1cba99f275490837d  7.0/en/os/alpha/mutt-1.2.5i-8.7.alpha.rpm
0d528824313b49c60a21a513e1056067  7.0/en/os/i386/mutt-1.2.5i-8.7.i386.rpm

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

You can verify each package with the following command: rpm --checksig 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: rpm --checksig --nogpg filename

Note that you need RPM >= 3.0 to check GnuPG keys.

8. References: