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Home » Hacking News » SuSE SA:2003:020: buffer overflow in mutt

SuSE SA:2003:020: buffer overflow in mutt

by Nikola Strahija on March 25th, 2003 A buffer overflow exist in the IMAP client code of the mail user agent Mutt. It is possible for a remote attacker to run arbitrary commands with the privileges of the user running Mutt.


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

______________________________________________________________________________

SuSE Security Announcement

Package: mutt
Announcement-ID: SuSE-SA:2003:020
Date: Monday, Mar 24th 2003 14:42 MET
Affected products: 7.1, 7.2, 7.3, 8.0, 8.1, 8.2
SuSE Linux Database Server,
SuSE eMail Server III, 3.1
SuSE Linux Enterprise Server 7,
SuSE Linux Enterprise Server 8,
SuSE Linux Firewall on CD/Admin host
SuSE Linux Connectivity Server
SuSE Linux Office Server
Vulnerability Type: remote system compromise
Severity (1-10): 3
SuSE default package: yes
Cross References: CAN-2003-0140

Content of this advisory:
1) security vulnerability resolved: buffer overflow in IMAP code
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- glibc
- rxvt
- apcupsd
- vnc
- openssl
3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion, solution, upgrade information

Mutt is a text-based Mail User Agent (MUA).
The IMAP-code of mutt is vulnerable to a buffer overflow that can be
exploited by a malicious IMAP-server to crash mutt or even execute
arbitrary code with the privileges of the user running mutt.

There is no temporary fix known.

Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command "rpm -Fhv file.rpm" to apply
the update.
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.

Please note, missing packages will be published as soon as possible.


Intel i386 Platform:

SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mutt-1.4i-216.i586.rpm
7d01a572e8ac3ec943c47c4171b4cc7a
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mutt-1.4i-216.i586.patch.rpm
7d30de523f8095a274795ceaee97d7a2
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/mutt-1.4i-216.src.rpm
6c09fbf30683dc3c2c5826d95d9161e1

SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/mutt-1.3.27i-77.i386.rpm
6727654fc00631af2cbefcef6f47c044
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/mutt-1.3.27i-77.i386.patch.rpm
63fcdb2d0ec41b35a618b59bae1681f3
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/mutt-1.3.27i-77.src.rpm
ac0cba7e06dbe4436dbbef1113162efb

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/mutt-1.3.22.1i-170.i386.rpm
285d09493353a097f00cb069dfd753b6
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/mutt-1.3.22.1i-170.src.rpm
c7c543c526600da535cd49738866f84c

SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/mutt-1.3.16i-92.i386.rpm
28452778101886f7aab8b4cf2f40712d
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/mutt-1.3.16i-92.src.rpm
9fe4038f89a4d2562571a49b6c0de7cf

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/mutt-1.3.12i-69.i386.rpm
0ece2802274e74bcea56a0787ca0b512
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/mutt-1.3.12i-69.src.rpm
d3b0bd624681e4d8cbe7ba235ca6c7d0



Sparc Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/mutt-1.3.22.1i-39.sparc.rpm
ddb9432dd66ca568a80dc11fb1c11c4d
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/mutt-1.3.22.1i-39.src.rpm
b32b6c0111f3a3f9004388c6a1af5d39




AXP Alpha Platform:

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/mutt-1.3.12i-15.alpha.rpm
1166abe4889a909b92ad3277b4c2d953
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/mutt-1.3.12i-15.src.rpm
e15c47bb9b5e0b72113b7d6612ad0557



PPC Power PC Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/mutt-1.3.22.1i-124.ppc.rpm
b3332965c3edad4bf9cda5c1381da51f
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/mutt-1.3.22.1i-124.src.rpm
89640af34db08a5ed8708807e9e20e1e

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n1/mutt-1.3.12i-16.ppc.rpm
5f2237363e057b1f5c8f3a2a79476e85
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/mutt-1.3.12i-16.src.rpm
4bcb6b68e8ea0e00a43bf3d549d6bb46


______________________________________________________________________________

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- glibc
An integer overflow was found in glibc's RPC-code. This bug enables
attackers to compromise a system remotely.
New packages are currently being build and will be available on our
FTP servers soon.

- rxvt
A new version of the rxvt packages was put on our FTP servers.
This version fix' the handling of dangerous escape-sequences.

- apcupsd
The control and management daemon for APC UPS systems is vulnerable
to remote code execution due to buffer overflow and format string bugs.
A dedicated advisory for this issue will be released as soon as all
packages are being build.

- vnc
VNC (Virtual Network Computing) uses a weak cookie generation process
which can be exploited by an attacker to bypass authentication.
New packages are currently being tested and will be available on our
FTP servers soon.

- openssl
A paper regarding remote timing attacks against OpenSSL has been
published by researchers of the Stanford University. It is possible
to extract the private RSA key used by services using OpenSSL by
observing their timing behavior. Fixed packages will be available
on our FTP servers soon.

______________________________________________________________________________

3) standard appendix: authenticity verification, additional information

- Package authenticity verification:

SuSE update packages are available on many mirror ftp servers all over
the world. While this service is being considered valuable and important
to the free and open source software community, many users wish to be
sure about the origin of the package and its content before installing
the package. There are two verification methods that can be used
independently from each other to prove the authenticity of a downloaded
file or rpm package:
1) md5sums as provided in the (cryptographically signed) announcement.
2) using the internal gpg signatures of the rpm package.

1) execute the command
md5sum
after you downloaded the file from a SuSE ftp server or its mirrors.
Then, compare the resulting md5sum with the one that is listed in the
announcement. Since the announcement containing the checksums is
cryptographically signed (usually using the key [email protected]),
the checksums show proof of the authenticity of the package.
We disrecommend to subscribe to security lists which cause the
email message containing the announcement to be modified so that
the signature does not match after transport through the mailing
list software.
Downsides: You must be able to verify the authenticity of the
announcement in the first place. If RPM packages are being rebuilt
and a new version of a package is published on the ftp server, all
md5 sums for the files are useless.

2) rpm package signatures provide an easy way to verify the authenticity
of an rpm package. Use the command
rpm -v --checksig
to verify the signature of the package, where is the
filename of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an un-installed rpm
package file.
Prerequisites:
a) gpg is installed
b) The package is signed using a certain key. The public part of this
key must be installed by the gpg program in the directory
~/.gnupg/ under the user's home directory who performs the
signature verification (usually root). You can import the key
that is used by SuSE in rpm packages for SuSE Linux by saving
this announcement to a file ("announcement.txt") and
running the command (do "su -" to be root):
gpg --batch; gpg < announcement.txt | gpg --import
SuSE Linux distributions version 7.1 and thereafter install the
key "[email protected]" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the top-level directory of the first CD (pubring.gpg)
and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .


- SuSE runs two security mailing lists to which any interested party may
subscribe:

[email protected]
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
.

[email protected]
- SuSE's announce-only mailing list.
Only SuSE's security announcements are sent to this list.
To subscribe, send an email to
.

For general information or the frequently asked questions (faq)
send mail to:
or
respectively.

=====================================================================
SuSE's security contact is or .
The public key is listed below.
=====================================================================
______________________________________________________________________________

The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular,
it is desired that the clear-text signature shows proof of the
authenticity of the text.
SuSE Linux AG makes no warranties of any kind whatsoever with respect
to the information contained in this security advisory.

Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key

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