U radu jezgre operacijskog sustava SUSE otkriveni su brojni propusti koji mogu dovesti do izvođenje DoS napada, dobivanja povećanih privilegija te stjecanja osjetljivih informacija.

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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                kernel
        Announcement ID:        SUSE-SA:2011:031
        Date:                   Mon, 25 Jul 2011 12:00:00 +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, potential local
privilege escalation
        CVSS v2 Base Score:     7.2 (AV:L/AC:L/Au:N/C:C/I:C/A:C)
        SUSE Default Package:   yes
        Cross-References:       CVE-2011-1012, CVE-2011-1017, CVE-2011-1020
                                CVE-2011-1078, CVE-2011-1079, CVE-2011-1080
                                CVE-2011-1160, CVE-2011-1170, CVE-2011-1171
                                CVE-2011-1172, CVE-2011-1173, CVE-2011-1577
                                CVE-2011-1585, CVE-2011-1593, CVE-2011-1598
                                CVE-2011-1745, CVE-2011-1746, CVE-2011-1748
                                CVE-2011-2182, CVE-2011-2183, CVE-2011-2213
                                CVE-2011-2491, CVE-2011-2496, CVE-2011-2517

    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
   2.6.32.43 and fixes various bugs and security issues.

   Following security issues were fixed:
   CVE-2011-2496: The normal mmap paths all avoid creating a mapping
   where the pgoff inside the mapping could wrap around due to
   overflow. However, an expanding mremap() can take such a non-wrapping
   mapping and make it bigger and cause a wrapping condition.

   CVE-2011-2491: A local unprivileged user able to access a NFS
   filesystem could use file locking to deadlock parts of an nfs server
   under some circumstance.

   CVE-2011-2183: Fixed a race between ksmd and other memory management
   code, which could result in a NULL ptr dereference and kernel crash.

   CVE-2011-2517: In both trigger_scan and sched_scan operations, we were
   checking for the SSID length before assigning the value correctly.
   Since the memory was just kzalloced, the check was always failing
   and SSID with over 32 characters were allowed to go through. This
   required CAP_NET_ADMIN privileges to be exploited.

   CVE-2011-2213: A malicious user or buggy application could
   inject diagnosing byte code and trigger an infinite loop in
   inet_diag_bc_audit().

   CVE-2011-1017,CVE-2011-1012,CVE-2011-2182: The code for evaluating
   LDM partitions (in fs/partitions/ldm.c) contained bugs that could
   crash the kernel for certain corrupted LDM partitions.

   CVE-2011-1593: Multiple integer overflows in the next_pidmap function
   in kernel/pid.c in the Linux kernel allowed local users to cause a
   denial of service (system crash) via a crafted (1) getdents or (2)
   readdir system call.

   CVE-2011-1020: The proc filesystem implementation in the Linux
   kernel did not restrict access to the /proc directory tree of a
   process after this process performs an exec of a setuid program,
   which allowed local users to obtain sensitive information or cause
   a denial of service via open, lseek, read, and write system calls.

   CVE-2011-1585: When using a setuid root mount.cifs, local users could
   hijack password protected mounted CIFS shares of other local users.

   CVE-2011-1160: Kernel information via the TPM devices could by used
   by local attackers to read kernel memory.

   CVE-2011-1577: The Linux kernel automatically evaluated partition
   tables of storage devices. The code for evaluating EFI GUID partitions
   (in fs/partitions/efi.c) contained a bug that causes a kernel oops
   on certain corrupted GUID partition tables, which might be used by
   local attackers to crash the kernel or potentially execute code.

   CVE-2011-1078: In a bluetooth ioctl, struct sco_conninfo has one
   padding byte in the end. Local variable cinfo of type sco_conninfo
   was copied to userspace with this uninitialized one byte, leading to
   an old stack contents leak.

   CVE-2011-1079: In a bluetooth ioctl, struct ca is copied
   from userspace.  It was not checked whether the "device" field
   was NULL terminated.  This potentially leads to BUG() inside of
   alloc_netdev_mqs() and/or information leak by creating a device with
   a name made of contents of kernel stack.

   CVE-2011-1080: In ebtables rule loading, struct tmp is copied
   from userspace.  It was not checked whether the "name" field is
   NULL terminated. This may have lead to buffer overflow and passing
   contents of kernel stack as a module name to try_then_request_module()
   and, consequently, to modprobe commandline.  It would be seen by all
   userspace processes.

   CVE-2011-1173: The econet_sendmsg function in net/econet/af_econet.c
   in the Linux kernel on the x86_64 platform allowed remote attackers
   to obtain potentially sensitive information from kernel stack memory
   by reading uninitialized data in the ah field of an Acorn Universal
   Networking (AUN) packet.

   CVE-2011-1170: net/ipv4/netfilter/arp_tables.c in the IPv4
   implementation in the Linux kernel did not place the expected '0'
   character at the end of string data in the values of certain structure
   members, which allowed local users to obtain potentially sensitive
   information from kernel memory by leveraging the CAP_NET_ADMIN
   capability to issue a crafted request, and then reading the argument
   to the resulting modprobe process.

   CVE-2011-1171: net/ipv4/netfilter/ip_tables.c in the IPv4
   implementation in the Linux kernel did not place the expected '0'
   character at the end of string data in the values of certain structure
   members, which allowed local users to obtain potentially sensitive
   information from kernel memory by leveraging the CAP_NET_ADMIN
   capability to issue a crafted request, and then reading the argument
   to the resulting modprobe process.

   CVE-2011-1172: net/ipv6/netfilter/ip6_tables.c in the IPv6
   implementation in the Linux kernel did not place the expected '0'
   character at the end of string data in the values of certain structure
   members, which allowed local users to obtain potentially sensitive
   information from kernel memory by leveraging the CAP_NET_ADMIN
   capability to issue a crafted request, and then reading the argument
   to the resulting modprobe process.

   CVE-2011-1746: Multiple integer overflows in the (1)
   agp_allocate_memory and (2) agp_create_user_memory functions in
   drivers/char/agp/generic.c in the Linux kernel before allowed local
   users to trigger buffer overflows, and consequently cause a denial of
   service (system crash) or possibly have unspecified other impact, via
   vectors related to calls that specify a large number of memory pages.

   CVE-2011-1745: Integer overflow in the agp_generic_insert_memory
   function in drivers/char/agp/generic.c in the Linux kernel allowed
   local users to gain privileges or cause a denial of service (system
   crash) via a crafted AGPIOC_BIND agp_ioctl ioctl call.

   CVE-2011-1598: The bcm_release function in net/can/bcm.c in the Linux
   kernel did not properly validate a socket data structure, which allowed
   local users to cause a denial of service (NULL pointer dereference) or
   possibly have unspecified other impact via a crafted release operation.

   CVE-2011-1748: The raw_release function in net/can/raw.c in the Linux
   kernel did not properly validate a socket data structure, which allows
   local users to cause a denial of service (NULL pointer dereference) or
   possibly have unspecified other impact via a crafted release operation.

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=318b8dd82438317a3b490cab811b1fe6
    
http://download.novell.com/patch/finder/?keywords=ab6bc73efff4bb12a70b6df584f7073f
    
http://download.novell.com/patch/finder/?keywords=a6c7e8b67f942c75a3f7e6e76641ff63
    
http://download.novell.com/patch/finder/?keywords=fa5f3b489f8749e53517f2679345ee47
    
http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f17d637

   SUSE Linux Enterprise Desktop 11 SP1
    
http://download.novell.com/patch/finder/?keywords=318b8dd82438317a3b490cab811b1fe6
    
http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f17d637

   SUSE Linux Enterprise Server 11 SP1
    
http://download.novell.com/patch/finder/?keywords=318b8dd82438317a3b490cab811b1fe6
    
http://download.novell.com/patch/finder/?keywords=ab6bc73efff4bb12a70b6df584f7073f
    
http://download.novell.com/patch/finder/?keywords=a6c7e8b67f942c75a3f7e6e76641ff63
    
http://download.novell.com/patch/finder/?keywords=fa5f3b489f8749e53517f2679345ee47
    
http://download.novell.com/patch/finder/?keywords=5d69352e58309ed0c7848b758f17d637

______________________________________________________________________________

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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