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SUSE alert SUSE-SA:2011:046 (kernel)

From:  Marcus Meissner <>
Subject:  [security-announce] SUSE Security Announcement: Linux kernel security update (SUSE-SA:2011:046)
Date:  Tue, 13 Dec 2011 17:34:50 +0100
Message-ID:  <>
Archive-link:  Article, Thread

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: kernel Announcement ID: SUSE-SA:2011:046 Date: Tue, 13 Dec 2011 17:00:00 +0000 Affected Products: SUSE Linux Enterprise High Availability Extension 11 SP1 SUSE Linux Enterprise Desktop 11 SP1 SUSE Linux Enterprise Server 11 SP1 Vulnerability Type: remote denial of service CVSS v2 Base Score: 5.7 (AV:A/AC:M/Au:N/C:N/I:N/A:C) SUSE Default Package: yes Cross-References: CVE-2011-1478, CVE-2011-1576, CVE-2011-1833 CVE-2011-2203, CVE-2011-2699, CVE-2011-3188 CVE-2011-4326, CVE-2011-4330 Content of This Advisory: 1) Security Vulnerability Resolved: Linux kernel security update 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 SUSE Linux Enterprise 11 Service Pack 1 kernel was updated to and fixes various bugs and security issues. Following security bugs were fixed: CVE-2011-3188: The TCP/IP initial sequence number generation effectively only used 24 bits of 32 to generate randomness, making a brute force man-in-the-middle attack on TCP/IP connections feasible. The generator was changed to use full 32bit randomness. CVE-2011-2699: Fernando Gont discovered that the IPv6 stack used predictable fragment identification numbers. A remote attacker could exploit this to exhaust network resources, leading to a denial of service. CVE-2011-2203: A NULL ptr dereference on mounting corrupt hfs filesystems was fixed which could be used by local attackers to crash the kernel. CVE-2011-1833: Added a kernel option to ensure ecryptfs is mounting only on paths belonging to the current ui, which would have allowed local attackers to potentially gain privileges via symlink attacks. CVE-2011-1576: The Generic Receive Offload (GRO) implementation in the Linux kernel allowed remote attackers to cause a denial of service via crafted VLAN packets that are processed by the napi_reuse_skb function, leading to (1) a memory leak or (2) memory corruption, a different vulnerability than CVE-2011-1478. CVE-2011-4330: A name overflow in the hfs filesystem was fixed, where mounting a corrupted hfs filesystem could lead to a stack overflow and code execution in the kernel. This requires a local attacker to be able to mount hfs filesystems. CVE-2011-4326: A bug was found in the way headroom check was performed in udp6_ufo_fragment() function. A remote attacker could use this flaw to crash the system. Following non-security bugs were fixed: - ALSA: hda - Fix S3/S4 problem on machines with VREF-pin mute-LED (bnc#732535). - patches.xen/xen-pcpu-hotplug: Fix a double kfree(). - ixgbe: fix bug with vlan strip in promisc mode (bnc#687049, fate#311821). - ixgbe: fix panic when shutting down system with WoL enabled. - fnic: Allow users to modify dev_loss_tmo setting (bnc#719786). - x86, intel: Do not mark sched_clock() as stable (bnc#725709). - ALSA: hda - Keep vref-LED during power-saving on IDT codecs (bnc#731981). - cifs: Assume passwords are encoded according to iocharset (bnc#731035). - scsi_dh: Check queuedata pointer before proceeding (bnc#714744). - netback: use correct index for invalidation in netbk_tx_check_mop(). - ACPI video: introduce module parameter video.use_bios_initial_backlight (bnc#731229). - SUNRPC: prevent task_cleanup running on freed xprt (bnc#709671). - add device entry for Broadcom Valentine combo card (bnc#722429). - quota: Fix WARN_ON in lookup_one_len (bnc#728626). - Update Xen patches to - pv-on-hvm/kexec: add xs_reset_watches to shutdown watches from old kernel (bnc#694863). - x86: undo_limit_pages() must reset page count. - mm/vmstat.c: cache align vm_stat (bnc#729721). - s390/ccwgroup: fix uevent vs dev attrs race (bnc#659101,LTC#69028). - Warn on pagecache limit usage (FATE309111). - SCSI: st: fix race in st_scsi_execute_end (bnc#720536). - ACPI: introduce "acpi_rsdp=" parameter for kdump (bnc#717263). - elousb: Limit the workaround warning to one per error, control workaround activity (bnc#719916). - SCSI: libiscsi: reset cmd timer if cmds are making progress (bnc#691440). - SCSI: fix crash in scsi_dispatch_cmd() (bnc#724989). - NFS/sunrpc: do not use a credential with extra groups (bnc#725878). - s390/qdio: EQBS retry after CCQ 96 (bnc#725453,LTC#76117). - fcoe: Reduce max_sectors to 1024 (bnc#695898). - apparmor: return -ENOENT when there is no profile for a hat (bnc#725502). - sched, cgroups: disallow attaching kthreadd (bnc#721840). - nfs: Check validity of cl_rpcclient in nfs_server_list_show (bnc#717884). - x86, vt-d: enable x2apic opt out (disabling x2apic through BIOS flag) (bnc#701183, fate#311989). - block: Free queue resources at blk_release_queue() (bnc#723815). - ALSA: hda - Add post_suspend patch ops (bnc#724800). - ALSA: hda - Allow codec-specific set_power_state ops (bnc#724800). - ALSA: hda - Add support for vref-out based mute LED control on IDT codecs (bnc#724800). - scsi_dh_rdac : Add definitions for different RDAC operating modes (bnc#724365). - scsi_dh_rdac : Detect the different RDAC operating modes (bnc#724365). - scsi_dh_rdac : decide whether to send mode select based on operating mode (bnc#724365). - scsi_dh_rdac: Use WWID from C8 page instead of Subsystem id from C4 page to identify storage (bnc#724365). - vlan: Match underlying dev carrier on vlan add (bnc#722504). - scsi_lib: pause between error retries (bnc#675127). - xfs: use KM_NOFS for allocations during attribute list operations (bnc#721830). - bootsplash: Do not crash when no fb is set (bnc#723542). - cifs: do not allow cifs_iget to match inodes of the wrong type (bnc#711501). - cifs: fix noserverino handling when 1 extensions are enabled (bnc#711501). - cifs: reduce false positives with inode aliasing serverino autodisable (bnc#711501). - parport_pc: release IO region properly if unsupported ITE887x card is found (bnc#721464). - writeback: avoid unnecessary calculation of bdi dirty thresholds (bnc#721299). - 1: Fix bogus it_blocksize in VIO iommu code (bnc#717690). - ext4: Fix max file size and logical block counting of extent format file (bnc#706374). - novfs: Unable to change password in the Novell Client for Linux (bnc#713229). - xfs: add more ilock tracing. - sched: move wakeup tracepoint above out_running (bnc#712002). - config.conf: Build KMPs for the -trace flavor as well (fate#312759, bnc#712404, bnc#712405, bnc#721337). - memsw: remove noswapaccount kernel parameter (bnc#719450). 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes Please reboot the machine after installing the update. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST "Online Update" module or the "zypper" commandline tool. The package and patch management stack will detect which updates are required and automatically perform 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. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SUSE Linux Enterprise High Availability Extension 11 SP1 SUSE Linux Enterprise Desktop 11 SP1 SUSE Linux Enterprise Server 11 SP1 ______________________________________________________________________________ 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. 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 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. - SUSE runs two security mailing lists to which any interested party may subscribe: - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <>. - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to <>. ===================================================================== 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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