-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Summary Report Announcement-ID: SUSE-SR:2005:005 Date: Friday, Feb 18th 2005 18:00 MEST Cross References: CAN-2004-1184 CAN-2004-1185 CAN-2004-1186 CAN-2005-0089 CAN-2005-0227 CAN-2005-0372 CAN-2003-0190 Content of this advisory: 1) solved security vulnerabilities: - multiple enscript problems - clamav update to 0.82 - postgresql LOAD vulnerability - python: SimpleXMLRPCServer flaw - openssh information leak - gftp directory traversal - openldap2 denial of service 2) pending vulnerabilities, solutions, workarounds: - problems with kernel update for SUSE Linux 9.1 - IDN cloaking problems with all browsers - multiple wget problems - new PostgreSQL problems - New kernel security problems 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. - Multiple enscript problems The text to postscript converter enscript has several security related problems, relating to input validation (CAN-2004-1184), missing sanitizing of filenames (CAN-2004-1185) and multiple buffer overflows (CAN-2004-1186). All SUSE Linux based products were affected. - clamav update to 0.82 The clamav virus scanner software was updated to 0.82, featuring several scan engine improvements, especially for strangely formatted mails. SUSE Linux versions 9.1 and 9.2, and SUSE Linux Enterprise Server 9 were affected. - postgresql LOAD vulnerability A vulnerability in the PostgreSQL 'LOAD' statement was fixed. This issue is tracked by the Mitre CVE ID CAN-2005-0227. All SUSE Linux based products were affected. - python: SimpleXMLRPCServer flaw This update fixes a bug in the SimpleXMLRPCServer which affects any program which allows remote untrusted users to do unrestricted traversal. The vulnerability can be used to access and change internal functions. This is tracked by the Mitre CVE ID CAN-2005-0089. All SUSE Linux based products were affected. - openssh information leak Openssh as shipped with SUSE Linux allows a possible timing attack that could be abused remotely to determine existing users on the system by watching replies to failed password attempts. This is tracked by the Mitre CVE ID CAN-2003-0190. Additionally the output of failing PAM sessions will now be displayed and the terminal-setting for aborted login-sessions will get restored correctly. This bugfix was released for SUSE Linux 9.1, 9.2 and SUSE Linux Enterprise Server 9. - gftp directory traversal Improper handling of filenames containing slashes allowed a malicious ftp server to overwrite files in the system if the user used gftp. This is tracked by the Mitre CVE ID CAN-2005-0372. SUSE Linux 9.1, 9.2 and Novell Linux Desktop 9 were affected. - openldap2 denial of service It was possible for a remote attacker to crash the openldap2 slapd LDAP server daemon by sending special query strings. (No Mitre CVE ID was assigned to this issue, it is backport from an upstream fix.) Additionally this update fixes several bugs spotted during Open Enterprise Server testing. All SUSE Linux based products were affected. ______________________________________________________________________________ 2) Pending vulnerabilities in SUSE Distributions and Workarounds: - problems with kernel update for SUSE Linux 9.1 Several users of NVidia cards reported problems with the last SUSE Linux 9.1 kernel update, leaving the screen black and the machine hung after reboot. We are working on a fix for this problem. Up to then you can either use an older 9.1 kernel, or compile the Nvidia driver for your own. - multiple wget problems We have still no solution for the wget issues as reported on Bugtraq: http://www.securityfocus.com/archive/1/383998 - IDN (Internationalized Domain Name) cloaking / homograph attacks Problems with the IDN / punycode handling that allows non-ASCII domain names were reported for every browser. We are aware of these issues and expect a good solution soon. - new PostgreSQL problems Additional PostgreSQL problems were reported: - A local user could bypass the EXECUTE permission check for functions by using the CREATE AGGREGATE command. CAN-2005-0244 - Multiple buffer overflows were found in PL/PgSQL. CAN-2005-0245, CAN-2005-0247 - A flaw in contrib/intagg CAN-2005-0246 We are working on updates for this problem. - New kernel security problems New kernel security problems in regards to signedness issues have been spotted by Georgi Guninski. We are working on updates for this problems. ______________________________________________________________________________ 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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