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Category:   Application (E-mail Client)  >   Mutt Vendors:   Mutt.org
(FreeBSD Issues Fix) Mutt E-mail Client Buffer Overflow May Let Remote Users Cause Arbitary Commands to Be Executed on the Mutt User's Host
SecurityTracker Alert ID:  1003110
SecurityTracker URL:  http://securitytracker.com/id/1003110
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jan 5 2002
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): mutt-1.2.5 and 1.3.24 and prior releases
Description:   A buffer overflow vulnerability was reported in the Mutt e-mail client that may allow remote users to cause arbitrary commands to be executed by another user's Mutt e-mail client.

It is reported that this vulnerability is remotely exploitable. The bug is apparently due to a one byte buffer overflow. No other details on the vulnerability were provided.

Impact:   A remote user may be able to create an e-mail message that, when viewed by another user with the Mutt client, will cause arbitrary commands to be executed by the Mutt client with the privileges of the user running Mutt.
Solution:   The vendor has released a fix and presents the following options:

1) Upgrade your entire ports collection and rebuild the ports.

2) Deinstall the old packages and install news package dated after the correction date, obtained from the following directories:

[i386]
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/mutt-1.2.5_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/mutt-devel-1.3.24_2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/mutt-1.2.5_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/mutt-devel-1.3.24_2.tgz

[alpha]
Packages are not automatically generated for the alpha architecture at this time due to lack of build resources.

NOTE: It may be several days before updated packages are available.

3) Download a new port skeleton for the mutt or mutt-devel port from:

http://www.freebsd.org/ports/

and use it to rebuild the port.

4) Use the portcheckout utility to automate option (3) above. The portcheckout port is available in /usr/ports/devel/portcheckout or the package can be obtained from:

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz

Vendor URL:  www.mutt.org/announce/mutt-1.2.5.1-1.3.25.html (Links to External Site)
Cause:   Boundary error
Underlying OS:   UNIX (FreeBSD)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 2 2002 Mutt E-mail Client Buffer Overflow May Let Remote Users Cause Arbitary Commands to Be Executed on the Mutt User's Host



 Source Message Contents

Date:  Fri, 4 Jan 2002 17:04:43 -0800 (PST)
Subject:  FreeBSD Ports Security Advisory FreeBSD-SA-02:04.mutt


-----BEGIN PGP SIGNED MESSAGE-----

=============================================================================
FreeBSD-SA-02:04                                            Security Advisory
                                                                FreeBSD, Inc.

Topic:          mutt ports contain remotely exploitable buffer overflow

Category:       ports
Module:         mutt
Announced:      2002-01-04
Credits:        Joost Pol <joost@contempt.nl>
Affects:        Ports collection prior to the correction date
Corrected:      2002-01-02 13:52:03 UTC (ports/mail/mutt: 1.2.x)
                2002-01-02 03:39:01 UTC (ports/mail/mutt-devel: 1.3.x)
FreeBSD only:   NO

I.   Background

Mutt is a small but very powerful text-based mail client for Unix
operating systems.

II.  Problem Description

The mutt ports, versions prior to mutt-1.2.25_1 and
mutt-devel-1.3.24_2, contain a buffer overflow in the handling of
email addresses in headers.

The mutt and mutt-devel ports are not installed by default, nor are
they "part of FreeBSD" as such: they are parts of the FreeBSD ports
collection, which contains over 6000 third-party applications in a
ready-to-install format. The ports collection shipped with FreeBSD 4.4
contains this problem since it was discovered after the release.

FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.

III. Impact

An attacker may send an email message with a specially crafted email
address in any of several message headers to the victim.  When the
victim reads the message using mutt and encounters that email address,
the buffer overflow is triggered and may result in arbitrary code
being executed with the privileges of the victim.

IV.  Workaround

1) Deinstall the mutt and mutt-devel ports/packages if you have them
installed.

V.   Solution

1) Upgrade your entire ports collection and rebuild the ports.

2) Deinstall the old packages and install news package dated after the
correction date, obtained from the following directories:

[i386]
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/mutt-1.2.5_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/mutt-devel-1.3.24_2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/mutt-1.2.5_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/mutt-devel-1.3.24_2.tgz

[alpha]
Packages are not automatically generated for the alpha architecture at
this time due to lack of build resources.

NOTE: It may be several days before updated packages are available.

3) Download a new port skeleton for the mutt or mutt-devel port from:

http://www.freebsd.org/ports/

and use it to rebuild the port.

4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz

VI.  Correction details

The following list contains the $FreeBSD$ revision numbers of each
file that was corrected in the FreeBSD source

Path                                                             Revision
- -------------------------------------------------------------------------
ports/mail/mutt/Makefile                                            1.110
ports/mail/mutt/files/patch-rfc822.c                                  1.1
ports/mail/mutt-devel/Makefile                                      1.141
ports/mail/mutt-devel/files/patch-rfc822-security                     1.1
- -------------------------------------------------------------------------

VII. References

<URL:http://www.mutt.org/announce/mutt-1.2.5.1-1.3.25.html>

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