-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: openssh Announcement ID: SUSE-SA:2006:062 Date: Fri, 20 Oct 2006 17:00:00 +0000 Affected Products: Novell Linux Desktop 9 Novell Linux POS 9 Open Enterprise Server SUSE LINUX 10.1 SUSE LINUX 10.0 SUSE LINUX 9.3 SUSE LINUX 9.2 SuSE Linux Desktop 1.0 SuSE Linux Enterprise Server 8 SuSE Linux Openexchange Server 4 SUSE LINUX Retail Solution 8 SuSE Linux School Server SuSE Linux Standard Server 8 SUSE SLED 10 SUSE SLES 10 SUSE SLES 9 UnitedLinux 1.0 Vulnerability Type: remote denial of service Severity (1-10): 7 SUSE Default Package: yes Cross-References: CVE-2006-4924, CVE-2006-4925, CVE-2006-5051 CVE-2006-5052 Content of This Advisory: 1) Security Vulnerability Resolved: various openssh security problems fixed in openssh 4.4 Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: See SUSE Security Summary Report. 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion Several security problems were fixed in OpenSSH 4.4 and the bug fixes were back ported to the openssh versions in our products. - CVE-2006-4924: A denial of service problem has been fixed in OpenSSH which could be used to cause lots of CPU consumption on a remote openssh server. - CVE-2006-4925: If a remote attacker is able to inject network traffic this could be used to cause a client connection to close. - CVE-2006-5051: Fixed an unsafe signal handler reported by Mark Dowd. The signal handler was vulnerable to a race condition that could be exploited to perform a pre-authentication denial of service. This vulnerability could theoretically lead to pre-authentication remote code execution if GSSAPI authentication is enabled, but the likelihood of successful exploitation appears remote. - CVE-2006-5052: Fixed a GSSAPI authentication abort that could be used to determine the validity of user names on some platforms. 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes On SUSE Linux Enterprise Server 8, please close and restart the sshd service after installing this update. All other products do this automatically during installation, there is no action necessary. 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 <file.rpm> to apply the update, replacing <file.rpm> with the filename of the downloaded RPM package. x86 Platform: SUSE LINUX 10.1: ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/openssh-4.2p1-18.9.i586.rpm 255c99f43b24995a085ac869082d0f32 ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/openssh-askpass-4.2p1-18.9.i586.rpm ab68460091ac8995290a3476b5b8dbeb SUSE LINUX 10.0: ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/openssh-4.1p1-10.9.i586.rpm dd3d6f3700e9e84294cf157c3a3141c1 ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/openssh-askpass-4.1p1-10.9.i586.rpm 89c7e004bb73629eac71ad642e8826d2 SUSE LINUX 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/openssh-3.9p1-12.8.i586.rpm dc57b898b4f43645c2fe18b58195de90 ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/openssh-askpass-3.9p1-12.8.i586.rpm cf7b7c04fc9e27684aa97206cd3ae0e0 SUSE LINUX 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openssh-3.9p1-3.10.i586.rpm e54678b3168c214400c30001c33f3d2d ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/openssh-askpass-3.9p1-3.10.i586.rpm 200b096a9a37b183c7ef75ae0b5b0b0c Power PC Platform: SUSE LINUX 10.1: ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/openssh-4.2p1-18.9.ppc.rpm f02d12d3ce4e303676efb1cf37d26b11 ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/openssh-askpass-4.2p1-18.9.ppc.rpm b577d22c8914b0cd36eb6187e9de6dfc SUSE LINUX 10.0: ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/openssh-4.1p1-10.9.ppc.rpm 3bd330de35c5e59775883e541af6aa91 ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/openssh-askpass-4.1p1-10.9.ppc.rpm 04ea40beed9130fb5f11eda80b248f31 x86-64 Platform: SUSE LINUX 10.1: ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/openssh-4.2p1-18.9.x86_64.rpm 55f9631c5a7a10f3a7d56016cabe3908 ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/openssh-askpass-4.2p1-18.9.x86_64.rpm f6c77143b56d82e78701db5b56a481d1 SUSE LINUX 10.0: ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/openssh-4.1p1-10.9.x86_64.rpm 32a2412b4f35461f530f73c95b5e85c2 ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/openssh-askpass-4.1p1-10.9.x86_64.rpm 0d89fa02d44e4ca99e237e3812fd4577 SUSE LINUX 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/openssh-3.9p1-12.8.x86_64.rpm cf96c984dffb0c10ac339d917e8ef97d ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/openssh-askpass-3.9p1-12.8.x86_64.rpm 9012087ea4c163b784178a3a7b22d44c SUSE LINUX 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/openssh-3.9p1-3.10.x86_64.rpm 7e004fedc5ff48a3c13a22d5cc1c2ab4 ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/openssh-askpass-3.9p1-3.10.x86_64.rpm 78278ce560a5ea87e1a4cf80126712c3 Sources: SUSE LINUX 10.1: ftp://ftp.suse.com/pub/suse/update/10.1/rpm/src/openssh-4.2p1-18.9.src.rpm 79f1eb2463e7638789c79ca62d158bea SUSE LINUX 10.0: ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/src/openssh-4.1p1-10.9.src.rpm 023b6d8056ad3dfec1357548d7b8a5ed SUSE LINUX 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/openssh-3.9p1-12.8.src.rpm fb5bd0e14208b1434313669fe01e8f07 SUSE LINUX 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/openssh-3.9p1-3.10.src.rpm c2bc3328b87cc77172b1185d364a8116 Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: UnitedLinux 1.0 SuSE Linux Openexchange Server 4 Open Enterprise Server Novell Linux POS 9 Novell Linux Desktop 9 SuSE Linux Enterprise Server 8 SuSE Linux Standard Server 8 SuSE Linux School Server SUSE LINUX Retail Solution 8 SuSE Linux Desktop 1.0 SUSE SLES 10 SUSE SLED 10 SUSE SLES 9 http://support.novell.com/techcenter/psdb/05412985c36daeff0c33b88942b68c2c.h... ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: See SUSE Security Summary Report. ______________________________________________________________________________ 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 <security@suse.de>" 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 <file.rpm> to verify the signature of the package, replacing <file.rpm> 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 <filename.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 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-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 e-mail 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>. ===================================================================== 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, 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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