Articles / SuSE: New Linux kernel pack…

SuSE: New Linux kernel packages fix remote denial of service

The SUSE Linux Enterprise 11 Service Pack 1 kernel was updated to 2.6.32.36 and fixes various bugs and security issues. When parsing the FAC_NATIONAL_DIGIS facilities field, it was possible for a remote host to provide more digipeaters than expected, resulting in heap corruption. In the rose networking stack, when parsing the FAC_CCITT_DEST_NSAP and FAC_CCITT_SRC_NSAP facilities fields, a remote host could provide a length of less than 10, resulting in an underflow in a memcpy size, causing a kernel panic due to massive heap corruption. The code for evaluating OSF partitions contained a bug that leaks data from kernel heap memory to userspace for certain corrupted OSF partitions.

A bug in the order of dccp_rcv_state_process() was fixed that still permitted reception even after closing the socket. A signedness issue in drm_modeset_ctl() could be used by local attackers with access to the drm devices to potentially crash the kernel or escalate privileges. The epoll subsystem in Linux did not prevent users from creating circular epoll file structures, potentially leading to a denial of service (kernel deadlock).

Multiple buffer overflows in the caiaq Native Instruments USB audio functionality might have allowed attackers to cause a denial of service or possibly have unspecified other impact via a long USB device name. Local attackers could send signals to their programs that looked like coming from the kernel, potentially gaining privileges in the context of setuid programs.

An issue in the core GRO code where an skb belonging to an unknown VLAN is reused could result in a NULL pointer dereference. Specially crafted requests may be written to /dev/sequencer resulting in an underflow when calculating a size for a copy_from_user() operation in the driver for MIDI interfaces. Due to a failure to validate user-supplied indexes in the driver for Yamaha YM3812 and OPL-3 chips, a specially crafted ioctl request could have been sent to /dev/sequencer, resulting in reading and writing beyond the bounds of heap buffers, and potentially allowing privilege escalation.

A information leak in the XFS geometry calls could be used by local attackers to gain access to kernel information. A page allocator issue in NFS v4 ACL handling that could lead to a denial of service (crash) was fixed. The Linux kernel did not properly audit INET_DIAG bytecode, which allowed local users to cause a denial of service (kernel infinite loop) via crafted INET_DIAG_REQ_BYTECODE instructions in a netlink message that contains multiple attribute elements. Fixed a buffer size issue in “usb iowarrior” module, where a malicious device could overflow a kernel buffer.

The dvb_ca_ioctl function did not check the sign of a certain integer field, which allowed local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a negative value. In the IrDA module, length fields provided by a peer for names and attributes may be longer than the destination array sizes and were not checked, this allowed local attackers (close to the irda port) to potentially corrupt memory. A system out of memory condition (denial of service) could be triggered with a large socket backlog, exploitable by local users.

The Radeon GPU drivers in the Linux kernel did not properly validate data related to the AA resolve registers, which allowed local users to write to arbitrary memory locations associated with Video RAM or the Graphics Translation Table via crafted values. Bounds checking was missing in AARESOLVE_OFFSET, which allowed local attackers to overwrite kernel memory and so escalate privileges or crash the kernel. Updated packages are available from download.opensuse.org.

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______________________________________________________________________________

                       SUSE Security Announcement

       Package:                kernel
       Announcement ID:        SUSE-SA:2011:019
       Date:                   Thu, 28 Apr 2011 11:00:00 +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, local privilege escalation
       CVSS v2 Base Score:     7.9 (AV:A/AC:M/Au:N/C:C/I:C/A:C)
       SUSE Default Package:   yes
       Cross-References:       CVE-2010-3880, CVE-2010-4251, CVE-2010-4656
                               CVE-2011-0191, CVE-2011-0521, CVE-2011-0712
                               CVE-2011-1013, CVE-2011-1016, CVE-2011-1082
                               CVE-2011-1090, CVE-2011-1093, CVE-2011-1163
                               CVE-2011-1180, CVE-2011-1182, CVE-2011-1476
                               CVE-2011-1477, CVE-2011-1478, CVE-2011-1493
                               CVE-2011-1573

   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:
           See SUSE Security Summary Report.
       6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

  The SUSE Linux Enterprise 11 Service Pack 1 kernel was updated to
  2.6.32.36 and fixes various bugs and security issues.

  Following security issues were fixed:
  CVE-2011-1493: When parsing the FAC_NATIONAL_DIGIS facilities field,
  it was possible for a remote host to provide more digipeaters than
  expected, resulting in heap corruption.

  (no CVEs assigned yet): In the rose networking stack, when parsing
  the FAC_CCITT_DEST_NSAP and FAC_CCITT_SRC_NSAP facilities fields,
  a remote host could provide a length of less than 10, resulting in
  an underflow in a memcpy size, causing a kernel panic due to massive
  heap corruption.  A length of greater than 20 results in a stack
  overflow of the callsign array

  CVE-2011-1163: The code for evaluating OSF partitions (in
  fs/partitions/osf.c) contained a bug that leaks data from kernel heap
  memory to userspace for certain corrupted OSF partitions.

  CVE-2011-1093: A bug in the order of dccp_rcv_state_process() was fixed
  that still permitted reception even after closing the socket. A Reset
  after close thus causes a NULL pointer dereference by not preventing
  operations on an already torn-down socket.

  CVE-2011-1013: A signedness issue in drm_modeset_ctl() could be used
  by local attackers with access to the drm devices to potentially
  crash the kernel or escalate privileges.

  CVE-2011-1082: The epoll subsystem in Linux did not prevent users
  from creating circular epoll file structures, potentially leading to
  a denial of service (kernel deadlock).

  CVE-2011-0712: Multiple buffer overflows in the caiaq Native
  Instruments USB audio functionality in the Linux kernel might have
  allowed attackers to cause a denial of service or possibly have
  unspecified other impact via a long USB device name, related to (1)
  the snd_usb_caiaq_audio_init function in sound/usb/caiaq/audio.c and
  (2) the snd_usb_caiaq_midi_init function in sound/usb/caiaq/midi.c.

  CVE-2011-1182: Local attackers could send signals to their programs
  that looked like coming from the kernel, potentially gaining privileges
  in the context of setuid programs.

  CVE-2011-1478: An issue in the core GRO code where an skb belonging to
  an unknown VLAN is reused could result in a NULL pointer dereference.

  CVE-2011-1476: Specially crafted requests may be written to
  /dev/sequencer resulting in an underflow when calculating a size for a
  copy_from_user() operation in the driver for MIDI interfaces. On x86,
  this just returns an error, but it could have caused memory corruption
  on other architectures. Other malformed requests could have resulted
  in the use of uninitialized variables.

  CVE-2011-1477: Due to a failure to validate user-supplied indexes in
  the driver for Yamaha YM3812 and OPL-3 chips, a specially crafted
  ioctl request could have been sent to /dev/sequencer, resulting in
  reading and writing beyond the bounds of heap buffers, and potentially
  allowing privilege escalation.

  CVE-2011-0191: A information leak in the XFS geometry calls could be
  used by local attackers to gain access to kernel information.

  CVE-2011-1090: A page allocator issue in NFS v4 ACL handling that
  could lead to a denial of service (crash) was fixed.

  CVE-2010-3880: net/ipv4/inet_diag.c in the Linux kernel did not
  properly audit INET_DIAG bytecode, which allowed local users
  to cause a denial of service (kernel infinite loop) via crafted
  INET_DIAG_REQ_BYTECODE instructions in a netlink message that contains
  multiple attribute elements, as demonstrated by INET_DIAG_BC_JMP
  instructions.

  CVE-2010-4656: Fixed a buffer size issue in "usb iowarrior" module,
  where a malicious device could overflow a kernel buffer.

  CVE-2011-0521: The dvb_ca_ioctl function in
  drivers/media/dvb/ttpci/av7110_ca.c in the Linux kernel did not check
  the sign of a certain integer field, which allowed local users to cause
  a denial of service (memory corruption) or possibly have unspecified
  other impact via a negative value.

  CVE-2011-1180: In the IrDA module, length fields provided by a peer
  for names and attributes may be longer than the destination array
  sizes and were not checked, this allowed local attackers (close to
  the irda port) to potentially corrupt memory.

  CVE-2010-4251: A system out of memory condition (denial of service)
  could be triggered with a large socket backlog, exploitable by
  local users.  This has been addressed by backlog limiting.

  CVE-2011-1016: The Radeon GPU drivers in the Linux kernel did not
  properly validate data related to the AA resolve registers, which
  allowed local users to write to arbitrary memory locations associated
  with (1) Video RAM (aka VRAM) or (2) the Graphics Translation Table
  (GTT) via crafted values.

  CVE-2011-1573: Bounds checking was missing in AARESOLVE_OFFSET, which
  allowed local attackers to overwrite kernel memory and so escalate
  privileges or crash the kernel.

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 Server 11 SP1
    http://download.novell.com/patch/finder/?keywords=03cf105d1f0cfb0d3d3288b12d9e4622
    http://download.novell.com/patch/finder/?keywords=c45827cb7cc89843ef7e93e246961f53
    http://download.novell.com/patch/finder/?keywords=68bb8a1c1491e9fae1ee541645084861
    http://download.novell.com/patch/finder/?keywords=3971e9fa298d12ad3517538fd97d750f
    http://download.novell.com/patch/finder/?keywords=a555a5338fdac718107ca5b4da82c923

  SUSE Linux Enterprise Desktop 11 SP1
    http://download.novell.com/patch/finder/?keywords=03cf105d1f0cfb0d3d3288b12d9e4622
    http://download.novell.com/patch/finder/?keywords=a555a5338fdac718107ca5b4da82c923

  SUSE Linux Enterprise High Availability Extension 11 SP1
    http://download.novell.com/patch/finder/?keywords=03cf105d1f0cfb0d3d3288b12d9e4622
    http://download.novell.com/patch/finder/?keywords=c45827cb7cc89843ef7e93e246961f53
    http://download.novell.com/patch/finder/?keywords=68bb8a1c1491e9fae1ee541645084861
    http://download.novell.com/patch/finder/?keywords=3971e9fa298d12ad3517538fd97d750f
    http://download.novell.com/patch/finder/?keywords=a555a5338fdac718107ca5b4da82c923

______________________________________________________________________________

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.

   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.

 - SUSE runs two security mailing lists to which any interested party may
   subscribe:

   opensuse-security@opensuse.org
       -   General Linux and SUSE security discussion.
           All SUSE security announcements are sent to this list.
           To subscribe, send an e-mail to
               <opensuse-security+subscribe@opensuse.org>.

   opensuse-security-announce@opensuse.org
       -   SUSE's announce-only mailing list.
           Only SUSE's security announcements are sent to this list.
           To subscribe, send an e-mail to
               <opensuse-security-announce+subscribe@opensuse.org>.

   =====================================================================
   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.

Type Bits/KeyID     Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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