-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Announcement Package: ipsec-tools Announcement-ID: SUSE-SA:2005:020 Date: Thu, 31 Mar 2005 13:00:00 +0000 Affected products: 9.1, 9.2 SUSE Linux Enterprise Server 9 Novell Linux Desktop 9 Vulnerability Type: remote denial of service Severity (1-10): 6 SUSE default package: no Cross References: CAN-2005-0398 Content of this advisory: 1) security vulnerability resolved: security problems in racoon problem description 2) solution/workaround 3) special instructions and notes 4) package location and checksums 5) pending vulnerabilities, solutions, workarounds: none 6) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion Racoon is a ISAKMP key management daemon used in IPsec setups. Sebastian Krahmer of the SUSE Security Team audited the daemon and found that it handles certain ISAKMP messages in a slightly wrong way, so that remote attackers can crash it via malformed ISAKMP packages. This update fixes this problem. This is tracked by the Mitre CVE ID CAN-2005-0398. 2) solution/workaround None. Please install the updated packages. 3) special instructions and notes Please restart the ipsec daemon, by running as root: /usr/sbin/rcracoon try-restart 4) package location and checksums 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. x86 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/ipsec-tools-0.4rc1-3.2.i586.rpm 396fbabba87d4da66d0a5a8bf004061a SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/ipsec-tools-0.3.3-1.6.i586.rpm a2b518867110fcb0a386472d0cfc76d7 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/ipsec-tools-0.3.3-1.6.src.rpm 177a7c30baeba235ae6feeb89c962153 x86-64 Platform: SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/ipsec-tools-0.4rc1-3.2.x86_64.rpm a4182f836f5c4af6b2fb57da4c57c134 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/ipsec-tools-0.4rc1-3.2.src.rpm 7f396a2b8bfb0f99f9dede830e9ba168 SUSE Linux 9.1: ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/ipsec-tools-0.3.3-1.6.x86_64.rpm fd1eb56dcad51c50944bb3a10ee3f23b source rpm(s): ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/ipsec-tools-0.3.3-1.6.src.rpm a2a311f0e24759afa7ba3412631cf83a ______________________________________________________________________________ 5) Pending vulnerabilities in SUSE Distributions and Workarounds: none ______________________________________________________________________________ 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 <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 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-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>. @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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