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SuSE Security Announcement

Package: mutt Announcement-ID: SuSE-SA:2002:001 Date: Monday, Jan 7th 2001 20:30 MET Affected SuSE versions: 6.4, 7.0, 7.1, 7.2, 7.3 Vulnerability Type: local privilege escalation Severity (1-10): 6 SuSE default package: yes Other affected systems: systems with the mutt mailer installed

Content of this advisory: 1) security vulnerability resolved: mutt problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds 3) standard appendix (further information)

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

mutt, a popular mail client for Linux-like systems, is vulnerable to a buffer overflow that is remotely exploitable. We have added patches to the versions of mutt as shipped with the affected distributions to fix the problem. We recommend to install the update package for your product and to restart all running instances of mutt. We thank Joost Pol for reporting the problem to the makers of mutt.

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.

NOTE: The SuSE Linux 7.0 distribution was shipped with two packages that contain the mutt mail program: "mutt" and "muttssl". For legal reasons, the muttssl package is available from the German ftp server ftp.suse.de. You can find out which version of the mutt package you are using with the following command: rpm -qf /usr/bin/mutt You only need to download and install the update package for the package that is installed on your system.

i386 Intel Platform:

SuSE-7.3 ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/mutt-1.3.22.1i-105.i386.rpm 65dd9854d16c9e3178aaff935486ab8a source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/mutt-1.3.22.1i-105.src.rpm 6efacb822144a49de85bb417f677dba6

SuSE-7.2 ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/mutt-1.3.16i-71.i386.rpm 012e18c5cd2122218b396ae3600fa875 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/mutt-1.3.16i-71.src.rpm 5755b3e620a49bcb93893c524ecceb1b

SuSE-7.1 ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/mutt-1.3.12i-51.i386.rpm 40df9d8f98dcebc7057849a246f16e21 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/mutt-1.3.12i-51.src.rpm c689f09724acc63065a66e291dedc85b

SuSE-7.0 ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/mutt-1.2.5i-38.i386.rpm 1e7d85e9f499ebf4b3fe749d8669de9e ftp://ftp.suse.de/pub/suse/i386/update/7.0/sec1/muttssl-1.2.5i-14.i386.rpm a61d53a1e65299b558c799654e57203f source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/mutt-1.2.5i-38.src.rpm 543834be481fc61d8390a72cd42feeb0 source rpm: ftp://ftp.suse.de/pub/suse/i386/update/7.0/zq1/muttssl-1.2.5i-14.src.rpm e67f148dee40a385136bc31240d51be6

SuSE-6.4 ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/mutt-1.0.1i-30.i386.rpm 53bae9b840be86683d670b784ec28c8c source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/mutt-1.0.1i-30.src.rpm c9ebd840ac72c5a3cfe9f45444f9a5e9

Sparc Platform:

SuSE-7.3 ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/mutt-1.3.22.1i-27.sparc.rpm 946ba6c36bd8c46d1ab494f54b288dc6 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/mutt-1.3.22.1i-27.src.rpm 9009e2d4e4f32d437422b8e8ed12ef55

SuSE-7.1 ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n1/mutt-1.3.12i-6.sparc.rpm 50f4f657a6a8bba819a34b2a05a9ea17 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/mutt-1.3.12i-6.src.rpm e7d3565e2063d76909c1a44e347f71de

SuSE-7.0 ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/mutt-1.2.5i-6.sparc.rpm fe06ca8880f38ea3064764614515f283 ftp://ftp.suse.de/pub/suse/sparc/update/7.0/sec1/muttssl-1.2.5i-8.sparc.rpm 3bdec5870cdddb5be68a8da3ff093de8 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/mutt-1.2.5i-6.src.rpm e3492d0390a7271def3955030a5451a0 source rpm: ftp://ftp.suse.de/pub/suse/sparc/update/7.0/zq1/muttssl-1.2.5i-8.src.rpm 3946004fc966f4135f47ff419bc2d1d6

AXP Alpha Platform:

SuSE-7.1 ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/mutt-1.3.12i-5.alpha.rpm 0cf2bd45bf05aded0468cad34774cac6 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/mutt-1.3.12i-5.src.rpm 7b04b3b10bb07c1d05ecd2322fd92be9

The AXP Alpha mutt packages for older distributions than 7.1 are currently being built and will appear at the usual location shortly.

PPC Power PC Platform:

SuSE-7.3 ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/mutt-1.3.22.1i-63.ppc.rpm 023ad9fde88518a3c07e183712305fd7 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/mutt-1.3.22.1i-63.src.rpm ed935acf49c36bcb290f4db37c7ae800

The PPC packages for SuSE Linux 7.1 are currently being built and will appear at the usual location shortly.

SuSE-7.0 ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/mutt-1.2.5i-12.ppc.rpm 476ed5e796692adda068a49ed2baf95e ftp://ftp.suse.de/pub/suse/ppc/update/7.0/sec1/muttssl-1.2.5i-11.ppc.rpm f4cb8011468d3e476fd7e24f733aec70 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/mutt-1.2.5i-12.src.rpm 550d058119f86c54a04d7506dbc1e878 source rpm: ftp://ftp.suse.de/pub/suse/ppc/update/7.0/zq1/muttssl-1.2.5i-11.src.rpm caa60a063952cb54582bf7a0885d5d81

SuSE-6.4 ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/mutt-1.0.1i-30.ppc.rpm 2ae9d12e448f9f519441c74aeeb64d4d source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/mutt-1.0.1i-30.src.rpm e2ae04f334216cbcd82f906a3a2bb83f

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2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- SuSE Security receive reports about successful exploitation of the problems in the secure shell package (ssh-1.2.27) on SuSE systems. Please read the secure shell security announcement from February 2001, available at http://www.suse.de/de/support/security/adv004_ssh.txt . More additional information can be found in the openssh announcement at http://www.suse.de/de/support/security/2001_045_openssh_txt.txt .

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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 <name-of-the-file.rpm> 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 security@suse.de), 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 <file.rpm> to verify the signature of the package, where <file.rpm> is the filename of the rpm package that you have downloaded. Of course, package authenticity verification can only target an uninstalled 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 "build@suse.de" upon installation or upgrade, provided that the package gpg is installed. The file containing the public key is placed at the toplevel 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:

suse-security@suse.com - general/linux/SuSE security discussion. All SuSE security announcements are sent to this list. To subscribe, send an email to suse-security-subscribe@suse.com.

suse-security-announce@suse.com - SuSE's announce-only mailing list. Only SuSE's security annoucements are sent to this list. To subscribe, send an email to suse-security-announce-subscribe@suse.com.

For general information or the frequently asked questions (faq) send mail to: suse-security-info@suse.com or suse-security-faq@suse.com respectively.

===================================================================== SuSE's security contact is security@suse.com or security@suse.de. The security@suse.de 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 cleartext signature shows proof of the authenticity of the text. SuSE GmbH 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 security@suse.de pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key build@suse.de

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