-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: cyrus-sasl-digestmd5 Announcement ID: SUSE-SA:2006:025 Date: Fri, 05 May 2006 13:00:00 +0000 Affected Products: SUSE LINUX 9.3 SUSE LINUX 9.2 SUSE LINUX 9.1 SUSE SLES 9 Vulnerability Type: remote denial of service Severity (1-10): 5 SUSE Default Package: yes Cross-References: CVE-2006-1721, CVE-2006-1905 Content of This Advisory: 1) Security Vulnerability Resolved: remote denial of service against cyrus-sasl using programs Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - xine-ui format string problems - clamav buffer overflow - mysql various issues - next kernel update - ethereal various problems 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion If a server or client is using DIGEST-MD5 authentication via the cyrus-sasl libraries it is possible to cause a denial of service attack against the other side (client or server) by leaving out the "realm=" header in the authentication. This is tracked by the Mitre CVE ID CVE-2006-1721. 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes Please restart the services using cyrus-sasl (cyrus-imapd is one of those). 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST Online Update (YOU) tool. YOU detects which updates are required and automatically performs the necessary steps to verify and install them. Alternatively, download the update packages for your distribution manually and verify their integrity by the methods listed in Section 6 of this announcement. Then install the packages using the command rpm -Fhv to apply the update, replacing with the filename of the downloaded RPM package. x86 Platform: SUSE LINUX 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/cyrus-sasl-digestmd5-2.1.20-7.2.i586.rpm 7ae81695233f202a12f4c5c7d819302e SUSE LINUX 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/cyrus-sasl-digestmd5-2.1.19-7.4.i586.rpm f91978bbd48c77c768aa5ddadc84ce3e SUSE LINUX 9.1: ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/cyrus-sasl-digestmd5-2.1.18-33.11.i586.rpm 080a9846ce3ce42cbfde6d1159e3cebc x86-64 Platform: SUSE LINUX 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/cyrus-sasl-digestmd5-2.1.20-7.2.x86_64.rpm d2ec2cde79e08f20bff8b248cee64f48 SUSE LINUX 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/cyrus-sasl-digestmd5-2.1.19-7.4.x86_64.rpm 77d305e731f06d7022bebb616ab85406 SUSE LINUX 9.1: ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/cyrus-sasl-digestmd5-2.1.18-33.11.x86_64.rpm cb6967a053f3672107ca83c7e81d6903 Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SUSE SLES 9 http://support.novell.com/cgi-bin/search/searchtid.cgi?psdb/35452cb6896bec38... ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: - xine-ui format string problems xine-ui has been updated to fix multiple format string bugs in the file name processing code of playlists that could potentially be exploited to execute arbitrary code (CVE-2006-1905). - clamav buffer overflow A clamav update to version 0.88.2 is in preparation, which fixes among other things the following security problem: - A buffer overflow in the freshclam program might allow remote web servers to execute arbitrary code via long HTTP headers (CVE-2006-1989). All SUSE Linux based products containing clamav are affected by these problems. - mysql various issues MySQL 5.0.21 was released fixing various security problems, including information leaks and a remote code execution. We are currently preparing updates for these problems. - next kernel update We are currently preparing a kernel update, collecting issues found in the last 3 months. The current schedule projects a release near end of may. All SUSE Linux based products will receive those updates. - ethereal various problems Various ethereal problems have been identified and fixed in the newest ethereal release. We are preparing updates for these problems. All SUSE Linux versions are affected. ______________________________________________________________________________ 6) Authenticity Verification and Additional Information - Announcement authenticity verification: SUSE security announcements are published via mailing lists and on Web sites. The authenticity and integrity of a SUSE security announcement is guaranteed by a cryptographic signature in each announcement. All SUSE security announcements are published with a valid signature. To verify the signature of the announcement, save it as text into a file and run the command gpg --verify <file> replacing <file> with the name of the file where you saved the announcement. The output for a valid signature looks like: gpg: Signature made <DATE> using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team " where <DATE> is replaced by the date the document was signed. If the security team's key is not contained in your key ring, you can import it from the first installation CD. To import the key, use the command gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc - Package authenticity verification: SUSE update packages are available on many mirror FTP servers all over the world. While this service is considered valuable and important to the free and open source software community, the authenticity and the integrity of a package needs to be verified to ensure that it has not been tampered with. 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) Using the internal gpg signatures of the rpm package 2) MD5 checksums as provided in this announcement 1) The internal 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, replacing with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from build@suse.de with the key ID 9C800ACA. This key is automatically imported into the RPM database (on RPMv4-based distributions) and the gpg key ring of 'root' during installation. You can also find it on the first installation CD and at the end of this announcement. 2) If you need an alternative means of verification, use the md5sum command to verify the authenticity of the packages. 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 SUSE security announcement. Because the announcement containing the checksums is cryptographically signed (by security@suse.de), the checksums show proof of the authenticity of the package if the signature of the announcement is valid. Note that the md5 sums published in the SUSE Security Announcements are valid for the respective packages only. Newer versions of these packages cannot be verified. - SUSE runs two security mailing lists to which any interested party may subscribe: suse-security@suse.com - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail 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 e-mail to . For general information or the frequently asked questions (FAQ), send mail to or . ===================================================================== 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, the clear text signature should show proof of the authenticity of the text. SUSE Linux Products GmbH provides no warranties of any kind whatsoever with respect to the information contained in this security advisory. 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