SUSE Security Announcement: kernel (SUSE-SA:2006:064)

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: kernel Announcement ID: SUSE-SA:2006:064 Date: Fri, 10 Nov 2006 10:00:00 +0000 Affected Products: 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 UnitedLinux 1.0 Vulnerability Type: local privilege escalation Severity (1-10): 6 SUSE Default Package: yes Cross-References: CVE-2006-2444, CVE-2006-2935, CVE-2006-3468 Content of This Advisory: 1) Security Vulnerability Resolved: various Linux 2.4 kernel security problems Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: none 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion The Linux kernel in our old Linux 2.4 kernel based distributions have been updated to fix various security issues and bugs. The bugs tracked by CVE-2006-3468, CVE-2006-2935, and CVE-2006-2444 were already fixed for all other products and announced in SUSE-SA:2006:057 and SUSE-SA:2006:047 respectively. - CVE-2006-3468: Remote attackers able to access an NFS of a ext2 or ext3 filesystem can cause a denial of service (file system panic) via a crafted UDP packet with a V2 look-up procedure that specifies a bad file handle (inode number), which triggers an error and causes an exported directory to be remounted read-only. This requires attackers with local network access. - CVE-2006-2935: A stack based buffer overflow in CDROM / DVD handling was fixed which could be used by a physical local attacker to crash the kernel or execute code within kernel context, depending on presence of automatic DVD handling in the system. By default our systems do not have automatic DVD handling. - CVE-2006-2444: The snmp_trap_decode function in the SNMP NAT helper allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees of previously-freed memory (double-free) by snmp_trap_decode as well as its calling function, as demonstrated via certain test cases of the PROTOS SNMP test suite. Also the following non-security bugs were fixed: - If the IPX network protocol was active, it was theoretically possible to remotely crash the machine by special crafted IPX network packets. The Linux kernel developers consider this problem not exploitable, so no CVE was assigned. - Fix dumps with DUMP_LEVEL=2. - Fixed some server crashes with "__alloc_pages: 1-order allocation failed (gfp=0x1f0/0)" errors. Fixes for the S/390: - This update contains the following Code Drops from Developerworks: Patchcluster 36 - Problem-ID: 26014 qeth: stack trace with msg "inconsistent lock state" - Problem-ID: 27706 kernel: user readable uninitialized kernel memory. For further description of the named Problem-IDs, please look to http://www-128.ibm.com/developerworks/linux/linux390/june2003_recommended.ht... 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes None. 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. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SuSE Linux Enterprise Server 8 for IBM zSeries http://support.novell.com/techcenter/psdb/aabad90e230984722c9884260efe69ee.h... SuSE Linux Enterprise Server 8 for IBM S/390 and IBM zSeries http://support.novell.com/techcenter/psdb/d90b894a706940fd53a7fb1d73dfc9d4.h... SuSE Linux Enterprise Server 8 for IBM iSeries and IBM pSeries http://support.novell.com/techcenter/psdb/ab257334465861fd968252a7b2bc1f3d.h... SuSE Linux Enterprise Server 8 for IPF http://support.novell.com/techcenter/psdb/85e547a01d9aab2432eaa26b0163cda9.h... SuSE Linux Enterprise Server 8 for AMD64 http://support.novell.com/techcenter/psdb/953fbe496665b510e79cafb4d6f28837.h... SuSE Linux Desktop 1.0 http://support.novell.com/techcenter/psdb/7464b65661cf57554b4ee821ea0bbf40.h... UnitedLinux 1.0 http://support.novell.com/techcenter/psdb/85e547a01d9aab2432eaa26b0163cda9.h... http://support.novell.com/techcenter/psdb/953fbe496665b510e79cafb4d6f28837.h... http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... SuSE Linux Openexchange Server 4 http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... SuSE Linux Enterprise Server 8 http://support.novell.com/techcenter/psdb/aabad90e230984722c9884260efe69ee.h... http://support.novell.com/techcenter/psdb/d90b894a706940fd53a7fb1d73dfc9d4.h... http://support.novell.com/techcenter/psdb/ab257334465861fd968252a7b2bc1f3d.h... http://support.novell.com/techcenter/psdb/85e547a01d9aab2432eaa26b0163cda9.h... http://support.novell.com/techcenter/psdb/953fbe496665b510e79cafb4d6f28837.h... http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... SuSE Linux Standard Server 8 http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... SuSE Linux School Server http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... SUSE LINUX Retail Solution 8 http://support.novell.com/techcenter/psdb/09c539304999e790397997e9b73bc166.h... ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: none ______________________________________________________________________________ 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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