===================================================================== CERT-Renater Note d'Information No. 2005/VULN180 _____________________________________________________________________ DATE : 14/03/2005 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running openslp. ====================================================================== ______________________________________________________________________________ SUSE Security Announcement Package: openslp Announcement-ID: SUSE-SA:2005:015 Date: Mon, March 14th 14:41:14 CET 2005 Affected products: 9.1, 9.2 SUSE Linux Enterprise Server 9 Novell Linux Desktop 9 Vulnerability Type: remote command execution Severity (1-10): 5 SUSE default package: Yes. Cross References: - Content of this advisory: 1) security vulnerability resolved: Buffer overflows in OpenSLP. problem description 2) solution/workaround 3) special instructions and notes 4) package location and checksums 5) pending vulnerabilities, solutions, workarounds: - squirrelmail - Koffice 6) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion The SUSE Security Team reviewed critical parts of the OpenSLP package, an open source implementation of the Service Location Protocol (SLP). SLP is used by Desktops to locate certain services such as printers and by servers to announce their services. During the audit, various buffer overflows and out of bounds memory access have been fixed which can be triggered by remote attackers by sending malformed SLP packets. 2) solution/workaround There is no easy workaround except to shut down the slpd and to stop using involved clients. 3) special instructions and notes Please make sure that all running instances of slpd which were started before the update are terminated. After the update, run the following command as root: /usr/sbin/rcslpd try-restart 4) package location and checksums 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 for installation from the maintenance web. x86 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-1.1.5-80.4.i586.rpm e183a877674fd83b401759c071f8ebfb ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-server-1.1.5-80.4.i586.rpm b68232aa97424dea8938fb07c67ee968 ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-devel-1.1.5-80.4.i586.rpm d15cb7cd7b224811cca38d4992d6dde9 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-1.1.5-80.4.i586.patch.rpm 24fecfe10275f3995be1248307a29d8c ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-server-1.1.5-80.4.i586.patch.rpm 0b0d8b6a0bbdc8b4962f12ee0465a083 ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openslp-devel-1.1.5-80.4.i586.patch.rpm 593b7c9104f1179761c2cac54431fec7 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/openslp-1.1.5-80.4.src.rpm a4852023f752182d68cea815d5905d7e SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-1.1.5-73.15.i586.rpm fa20a6d60a64aff0998eed99fab4a9af ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-server-1.1.5-73.15.i586.rpm 604d8b96c9bfbce6b2fac07e37465636 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-devel-1.1.5-73.15.i586.rpm cd6851d2adcf9439c9dcc317de052089 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-1.1.5-73.15.i586.patch.rpm 7b4688c03fd664d6742a70245530d4a6 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-server-1.1.5-73.15.i586.patch.rpm 4b46e36bd47cbb8ce2d08225dcca2c88 ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/openslp-devel-1.1.5-73.15.i586.patch.rpm 002c614947ede188c85bb4fb62dfdbd6 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/openslp-1.1.5-73.15.src.rpm 2b29878d5706dccf0b5b5902c3e9315c x86-64 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-1.1.5-80.4.x86_64.rpm dba5224660ab6f76846d5be2d2c3531d ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-server-1.1.5-80.4.x86_64.rpm 6ab38f02002f44e24e9617794c7a50b5 ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-devel-1.1.5-80.4.x86_64.rpm d3ccb03fe6c509b05a278c60ca7be889 patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-1.1.5-80.4.x86_64.patch.rpm a9c86a43725a13fb14c86af85ace7131 ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-server-1.1.5-80.4.x86_64.patch.rpm cc83600072f4d3f5ededeb60c16bc25b ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/openslp-devel-1.1.5-80.4.x86_64.patch.rpm b91a5bb0ce85bd5f30db9c794618dc00 source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/openslp-1.1.5-80.4.src.rpm a4852023f752182d68cea815d5905d7e SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-1.1.5-73.15.x86_64.rpm f15832a7d86cad37f73671123c3a1706 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-server-1.1.5-73.15.x86_64.rpm e418cd6a08fce7a0091fef7b4f801dd2 ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-devel-1.1.5-73.15.x86_64.rpm 5f409e569a149cf83ddaf7fdb6a41dcb patch rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-1.1.5-73.15.x86_64.patch.rpm 737bb45b6d95f0fac5d31f2b95924b1d ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-server-1.1.5-73.15.x86_64.patch.rpm 8a14bb253b411bf6de617a557b2dcd6f ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/openslp-devel-1.1.5-73.15.x86_64.patch.rpm 6936b808204a5a48faccdf8446b72a80 source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/openslp-1.1.5-73.15.src.rpm 2e443c1bedac57827cc9d2363e0d25b1 ______________________________________________________________________________ 5) Pending vulnerabilities in SUSE Distributions and Workarounds: - squirrelmail New squirrelmail packages for the S/MIME plugin command injection vulnerability are available on our ftp servers. - Koffice New Koffice packages are available on our ftp servers, fixing buffer overflows in the pdf engine. ______________________________________________________________________________ 6) 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 at 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 to verify the signature of the package, where 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 at 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 at 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 at 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. 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 ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================