-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: perl-MailTools Announcement-ID: SuSE-SA:2002:041 Date: Tue Nov 5 11:30:00 CET 2002 Affected products: 7.1, 7.2, 7.3, 8.0, 8.1 SuSE eMail Server III, 3.1 Vulnerability Type: remote command execution Severity (1-10): 6 SuSE default package: no Cross References: - Content of this advisory: 1) security vulnerability resolved: Remote command execution via Mail::Mailer package. problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information The SuSE Security Team reviewed critical Perl modules, including the Mail::Mailer package. This package contains a security hole which allows remote attackers to execute arbitrary commands in certain circumstances. This is due to the usage of mailx as default mailer which allows commands to be embedded in the mail body. Vulnerable to this attack are custom auto reply programs or spam filters which use Mail::Mailer directly or indirectly. 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. i386 Intel Platform: SuSE-8.1 ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/perl-MailTools-1.47-29.i586.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/perl-MailTools-1.47-29.src.rpm d41d8cd98f00b204e9800998ecf8427e SuSE-8.0 ftp://ftp.suse.com/pub/suse/i386/update/8.0/perl3/perl-MailTools-1.42-120.i386.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/perl-MailTools-1.42-120.src.rpm d41d8cd98f00b204e9800998ecf8427e SuSE-7.3 ftp://ftp.suse.com/pub/suse/i386/update/7.3/perl2/perl-MailTools-1.1401-187.i386.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/perl-MailTools-1.1401-187.src.rpm d41d8cd98f00b204e9800998ecf8427e SuSE-7.2 ftp://ftp.suse.com/pub/suse/i386/update/7.2/perl2/perl-MailTools-1.1401-187.i386.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/perl-MailTools-1.1401-187.src.rpm d41d8cd98f00b204e9800998ecf8427e SuSE-7.1 ftp://ftp.suse.com/pub/suse/i386/update/7.1/perl2/perl-MailTools-1.1401-188.i386.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/perl-MailTools-1.1401-188.src.rpm d41d8cd98f00b204e9800998ecf8427e Sparc Platform: SuSE-7.3 ftp://ftp.suse.com/pub/suse/sparc/update/7.3/perl2/perl-MailTools-1.1401-65.sparc.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/perl-MailTools-1.1401-65.src.rpm d41d8cd98f00b204e9800998ecf8427e AXP Alpha Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/axp/update/7.1/perl2/perl-MailTools-1.1401-69.alpha.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/perl-MailTools-1.1401-69.src.rpm d41d8cd98f00b204e9800998ecf8427e PPC Power PC Platform: SuSE-7.3 ftp://ftp.suse.com/pub/suse/ppc/update/7.3/perl2/perl-MailTools-1.1401-110.ppc.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/perl-MailTools-1.1401-110.src.rpm d41d8cd98f00b204e9800998ecf8427e SuSE-7.1 ftp://ftp.suse.com/pub/suse/ppc/update/7.1/perl2/perl-MailTools-1.1401-111.ppc.rpm d41d8cd98f00b204e9800998ecf8427e source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/perl-MailTools-1.1401-111.src.rpm d41d8cd98f00b204e9800998ecf8427e ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: There is no additional information this time. ______________________________________________________________________________ 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 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 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 "build@suse.de" 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: 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-announce@suse.com - 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. 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