-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Summary Report Announcement-ID: SUSE-SR:2004:002 Date: Tuesday, Nov 30th 2004 14:00 MEST Cross References: CAN-2004-0504 CAN-2004-0505 CAN-2004-0506 CAN-2004-0507 CAN-2002-0029 CAN-2004-0888 CAN-2004-0889 CAN-2004-0986 Content of this advisory: 1) solved security vulnerabilities: - perl-Archive-Zip file evasion problem - evolution certificate handling - resmgr fake tty addition - xpdf issues: tetex - abiword / wv buffer overflows - iptables - uninitialised variable - gnome-vfs issues - glibc missed buffer overflow fixes - ethereal protocol handler problems 2) pending vulnerabilities, solutions, workarounds: - kernel problems - cyrus-imapd remote problems - Sun Java Plugin - setuid perl permissions 3) standard appendix (further information) ______________________________________________________________________________ 1) solved security vulnerabilities To avoid spamming lists with advisories for every small incident, we will release weekly summary advisories for issues where we have released updates without a full advisory. Since these are minor issues, md5sums and ftp urls are not included. Fixed packages for the following incidents are already available on our FTP server and via the YaST Online Update. - perl-Archive-Zip perl-Archive-Zip are Perl modules to handle extraction of ZIP archives. These had the bug that for certain invalid headers, extracted files could have the size 0 shown, but otherwise were extracted correctly. This trick could have been used by virus authors to fool virus scanners. It was found by iDEFENSE security, refer to this URL: http://www.idefense.com/application/poi/display?id=153 All SUSE Linux based products are affected. - evolution There was a problem in the evolution SSL certificate handling which lead to always untrusted certificates. All SUSE Linux based products up to SUSE Linux 9.1 and SUSE Linux Enterprise Server 9 are affected. - resmgr resmgr is used for handling permissions of normal desktop based devices (audio, video, USB, and similar) in a safe and secure way. It was possible for a remotely logged in user to gain access to the virtual desktop group, indirectly gaining access to the desktop devices. SUSE Linux 8.2 up to 9.2, and SUSE Linux Enterprise Server 9 are affected. - tetex tetex contains PDF processing tools, which were affected by the xpdf integer and buffer overflow vulnerabilities already reported. The xpdf issues are tracked by the Mitre CVE Ids CAN-2004-0888 and CAN-2004-0889. All SUSE Linux based products are affected. - abiword abiword contains the Microsoft Word compatibility library "wv". Several months ago we fixed buffer overflow issues in the "wv" library, this is an update fixing the problem in the copy of "wv" in abiword. Only SuSE Linux 8.1 is affected by this problem. - iptables The iptables program used an uninitialized variable to find out about the module loader for the first module loaded (ip_tables). In rare cases it was possible that this could lead to this module not being loaded and iptables based firewalls not activated at all. We were not able to reproduce this and have no reports of this happening, however we have released fixed packages nethertheless. This is tracked by the Mitre CVE Id CAN-2004-0986. All SUSE Linux based products are affected. - gnome-vfs Several GNOME vfs handlers had problematic code, for instance unsafe argument evaluation and similar. We released updates fixing the known issues. All SUSE Linux based products are affected. - glibc A buffer overflow fix in the resolver libraries of glibc 2.2 was found missing. Reference is the Mitre CVE Id CAN-2002-0029. Fixed packages are available. SUSE Linux 8.1 and SUSE Linux Enterprise Server 8 are affected by this problem. - ethereal Several protocol handlers in the network analysis tool ethereal had security problems which could lead bad network input to ethereal crashing. These crashes are tracked by the Mitre CVE Ids CAN-2004-0504, CAN-2004-0505, CAN-2004-0506, and CAN-2004-0507. All SUSE Linux based products are affected. ______________________________________________________________________________ 2) Pending vulnerabilities in SUSE Distributions and Workarounds: - kernel Several problems have been found in the Linux 2.4 and 2.6 kernels: - Several issues have been found in the error handling of the ELF loader routines by Paul Starzetz of isec.pl. These are tracked by the Mitre CVE Ids: CAN-2004-1070,CAN-2004-1071,CAN-2004-1072 CAN-2004-1073. - Several overflow checks in the smbfs handling of both Linux 2.4 and 2.6 were found missing by Stefan Esser. This is tracked by the Mitre CVE Id CAN-2004-0883. - Handcrafted a.out binaries could be used to trigger a local denial of service condition in both 2.4 and 2.6 Linux kernels. Fixes for this problem were done by Chris Wright. This is tracked by the Mitre CVE Id CAN-2004-1074. - A very small race window was found in the memory management of the kernel which could be used to show the content of random physical memory pages potentially leading to information disclosure. This is already fixed in the mainline kernel. These bugs affect all SUSE Linux products. We are in the process of releasing updated packages. - cyrus-imapd Remote buffer overflow possibilites in the Cyrus IMAP daemon were found by Stefan Esser and Sebastian Krahmer. All SUSE Linux based products are affected. - Sun Java Plugin A privilege escalation problem was found in the Sun Java Plugin which could have a remote attacker reading and writing files of a local user browsing websites. This bug affects all SUSE versions on the Intel x86 and AMD64 / Intel Extended Memory Architecture (EM64T) platforms. We are in the process of releasing updated Java packages. - perl SUSE LINUX 9.2 follows the new upstream policy to install /usr/bin/suidperl as hardlink to /usr/bin/perl. In previous perl versions it used to be a hardlink to /usr/bin/sperl*. Therefore one must not set a setuid bit on /usr/bin/suidperl as suggested in the rpm package description of perl. Set the bit on /usr/bin/sperl5.8.5 instead if you really need the suid feature. Also check your /etc/permissions.local file for references of /usr/bin/suidperl if you where upgrading from previous SUSE LINUX releases. SUSE Linux is not affected by this problem in the default installation, only if the administrator added the s-bit to suidperl. ______________________________________________________________________________ 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 recommend against subscribing to security lists that cause the e-mail 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 file name 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 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-subscribe@suse.com>. 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 <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 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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