U radu jezgre operacijskog sustava SUSE otkriveno je više sigurnosnih nedostataka. Napadačima omogućuju izvođenje DoS napada, dobivanje većih ovlasti i pokretanje proizvoljnog programskog koda.

-----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
   2.6.32.49 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 2.6.32.48.
   - 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
    
http://download.novell.com/patch/finder/?keywords=d4b5f25f4db8718301e7e16715b81839
    
http://download.novell.com/patch/finder/?keywords=31d452e9bdc91325cef696c4c54131ba
    
http://download.novell.com/patch/finder/?keywords=f2bc63a432cbfc30adf058c05528c5fd
    
http://download.novell.com/patch/finder/?keywords=0b7e04a54fedaae34f6309faa0744773
    
http://download.novell.com/patch/finder/?keywords=836acbf4bd9c116e2d6a3b8cc8e914ff
    
http://download.novell.com/patch/finder/?keywords=9b0aea51d7510d41288711e510f010df

   SUSE Linux Enterprise Desktop 11 SP1
    
http://download.novell.com/patch/finder/?keywords=31d452e9bdc91325cef696c4c54131ba
    
http://download.novell.com/patch/finder/?keywords=9b0aea51d7510d41288711e510f010df

   SUSE Linux Enterprise Server 11 SP1
    
http://download.novell.com/patch/finder/?keywords=a4d065fb806f84b6cda40ea4a843aae7
    
http://download.novell.com/patch/finder/?keywords=d4b5f25f4db8718301e7e16715b81839
    
http://download.novell.com/patch/finder/?keywords=31d452e9bdc91325cef696c4c54131ba
    
http://download.novell.com/patch/finder/?keywords=f2bc63a432cbfc30adf058c05528c5fd
    
http://download.novell.com/patch/finder/?keywords=0b7e04a54fedaae34f6309faa0744773
    
http://download.novell.com/patch/finder/?keywords=836acbf4bd9c116e2d6a3b8cc8e914ff
    
http://download.novell.com/patch/finder/?keywords=9b0aea51d7510d41288711e510f010df

______________________________________________________________________________

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 <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>"

    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 Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. 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:

    Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
        -   General Linux and SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an e-mail to
                <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.

    Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
        -   SUSE's announce-only mailing list.
            Only SUSE's security announcements are sent to this list.
            To subscribe, send an e-mail to
                <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.

    =====================================================================
    SUSE's security contact is <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> or <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.
    The <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 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.

Type Bits/KeyID     Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>

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