Articles / SuSE: New kernel packages f...

SuSE: New kernel packages fix remote code execution

This update fixes various security issues and some bugs in the SUSE Linux Enterprise 9 kernel. A crafted NFS write request might have caused a buffer overwrite, potentially causing a kernel crash. The copy_to_user implementation might have leaked kernel memory depending on specific user buffer setups. The r8169 driver did not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to cause a denial of service. A use-after-free vulnerability when IPV6_RECVPKTINFO is set on a listening socket, allowed remote attackers to cause a denial of service. The vfs implementation did not prevent creation of a child dentry for a deleted (aka S_DEAD) directory, which allowed local users to cause a denial of service. The nfs_lock function did not properly remove POSIX locks on files that are setgid without group-execute permission, which allows local users to cause a denial of service. The do_coredump function did not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which might have allowed local users to obtain sensitive information. The Linux kernel did not always follow NFS automount “symlinks,” which allowed attackers to have an unknown impact. A stack-based buffer overflow in the hfs subsystem allowed remote attackers to have an unspecified impact. The processcompl_compat function did not clear the transfer buffer before returning to userspace when a USB command fails, which might have made it easier for physically proximate attackers to obtain sensitive information (kernel memory). Updated packages are available from download.opensuse.org.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

______________________________________________________________________________

                       SUSE Security Announcement

       Package:                kernel
       Announcement ID:        SUSE-SA:2010:036
       Date:                   Wed, 01 Sep 2010 11:00:00 +0000
       Affected Products:      SUSE SLES 9
                               Open Enterprise Server
                               Novell Linux POS 9
       Vulnerability Type:     remote denial of service
       CVSS v2 Base Score:     7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
       SUSE Default Package:   yes
       Cross-References:       CVE-2007-6206, CVE-2007-6733, CVE-2008-0598
                               CVE-2008-3275, CVE-2009-1389, CVE-2009-4020
                               CVE-2009-4537, CVE-2010-0727, CVE-2010-1083
                               CVE-2010-1088, CVE-2010-1188, CVE-2010-2521

   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

  This update fixes various security issues and some bugs in the SUSE Linux
  Enterprise 9 kernel.

  Following security issues were fixed:
  CVE-2010-2521: A crafted NFS write request might have caused a buffer overwrite,
  potentially causing a kernel crash.

  CVE-2008-0598: The x86_64 copy_to_user implementation might have leaked kernel
  memory depending on specific user buffer setups.

  CVE-2009-4537: drivers/net/r8169.c in the r8169 driver in the Linux kernel
  did not properly check the size of an Ethernet frame that exceeds the MTU,
  which allows remote attackers to (1) cause a denial of service (temporary
  network outage) via a packet with a crafted size, in conjunction with
  certain packets containing A characters and certain packets containing E
  characters; or (2) cause a denial of service (system crash) via a packet
  with a crafted size, in conjunction with certain packets containing '\0'
  characters, related to the value of the status register and erroneous
  behavior associated with the RxMaxSize register. NOTE: this vulnerability
  exists because of an incorrect fix for CVE-2009-1389.

  CVE-2010-1188: Use-after-free vulnerability in net/ipv4/tcp_input.c in
  the Linux kernel 2.6 when IPV6_RECVPKTINFO is set on a listening socket,
  allowed remote attackers to cause a denial of service (kernel panic)
  via a SYN packet while the socket is in a listening (TCP_LISTEN) state,
  which is not properly handled causes the skb structure to be freed.

  CVE-2008-3275: The (1) real_lookup and (2) __lookup_hash functions
  in fs/namei.c in the vfs implementation in the Linux kernel did not
  prevent creation of a child dentry for a deleted (aka S_DEAD) directory,
  which allowed local users to cause a denial of service ("overflow" of
  the UBIFS orphan area) via a series of attempted file creations within
  deleted directories.

  CVE-2007-6733: The nfs_lock function in fs/nfs/file.c in the Linux kernel
  did not properly remove POSIX locks on files that are setgid without
  group-execute permission, which allows local users to cause a denial of
  service (BUG and system crash) by locking a file on an NFS filesystem and
  then changing this files permissions, a related issue to CVE-2010-0727.

  CVE-2007-6206: The do_coredump function in fs/exec.c in Linux kernel
  did not change the UID of a core dump file if it exists before a root
  process creates a core dump in the same location, which might have allowed
  local users to obtain sensitive information.

  CVE-2010-1088: fs/namei.c in the Linux kernel did not always follow NFS
  automount "symlinks," which allowed attackers to have an unknown impact,
  related to LOOKUP_FOLLOW.

  CVE-2009-4020: Stack-based buffer overflow in the hfs subsystem in the
  Linux kernel allowed remote attackers to have an unspecified impact
  via a crafted Hierarchical File System (HFS) filesystem, related to the
  hfs_readdir function in fs/hfs/dir.c.

  CVE-2010-1083: The processcompl_compat function in
  drivers/usb/core/devio.c in Linux kernel did not clear the transfer
  buffer before returning to userspace when a USB command fails, which
  might have made it easier for physically proximate attackers to obtain
  sensitive information (kernel memory).

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 (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 <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 CORE 9 for AMD64 and Intel EM64T
    http://download.novell.com/patch/finder/?keywords=b13b7c37b794913aaef1d239c08b31ab

  SUSE CORE 9 for IBM zSeries 64bit
    http://download.novell.com/patch/finder/?keywords=5d5bd50baa9a4fcb6b4fda8d7a3a79f3

  SUSE CORE 9 for IBM S/390 31bit
    http://download.novell.com/patch/finder/?keywords=ec0907a749db912429f923a2bbfdcfff

  SUSE CORE 9 for IBM POWER
    http://download.novell.com/patch/finder/?keywords=dd0f13d71502c69174ee0008c6ae7a63

  SUSE CORE 9 for Itanium Processor Family
    http://download.novell.com/patch/finder/?keywords=a3f3f41a042648ecf313d65b8ff974ac

  Novell Linux POS 9
    http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a

  SUSE SLES 9
    http://download.novell.com/patch/finder/?keywords=b13b7c37b794913aaef1d239c08b31ab
    http://download.novell.com/patch/finder/?keywords=5d5bd50baa9a4fcb6b4fda8d7a3a79f3
    http://download.novell.com/patch/finder/?keywords=ec0907a749db912429f923a2bbfdcfff
    http://download.novell.com/patch/finder/?keywords=dd0f13d71502c69174ee0008c6ae7a63
    http://download.novell.com/patch/finder/?keywords=a3f3f41a042648ecf313d65b8ff974ac
    http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a

  SUSE CORE 9 for x86
    http://download.novell.com/patch/finder/?keywords=46a94f2d03cb2089d641b6390867fd8a

  Open Enterprise Server
    http://download.novell.com/patch/finder/?keywords=c14f8a2a7882052067244604d07964d9
    http://download.novell.com/patch/finder/?keywords=e0b5a1783f742694f60bf1c4d1f86599

______________________________________________________________________________

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>

- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2 (GNU/Linux)
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=ypVs
- -----END PGP PUBLIC KEY BLOCK-----

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.15 (GNU/Linux)

iQEVAwUBTH4dQney5gA9JdPZAQIQJAf7BXMRP+1aYacnqoeSpRrDqwuL/003IIkc
G+ZhosWuejNNKOzp/jthIpcMip0f2ivo7W3zGQ/uKvPheDcU2WqBP2qO/TK9ONI6
EbbRcuXq4vQNfhuRtZ+c4qyZ4C5M3GPal7wskpLliVYBRfi+VTdDrUQ3Hxzbtyvn
bAvoduCXONHJjeEwpKLZfc/d2KCwXQWYzjROvOv6miHw2COV0C4JggnOhzFW32IC
rXxebXEYg86heTZdqZNubZZ0bLynPWWUeLIIGEqkv9Vx4Lg335zg+Ab/HBJenxy5
nXYmV1MmlDqElmYf1V6yZ5uRXaQAjla+5itJmjMTNylh7wiZxW1vAQ==
=g2Nt
-----END PGP SIGNATURE——
Screenshot

Project Spotlight

Seed7

An extendable programming language.

Screenshot

Project Spotlight

QuartzDesk

A Java Quartz scheduler management and monitoring UI/tool.