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SUSE Security Announcement

Package: kernel
Announcement ID: SUSE-SA:2009:033
Date: Tue, 16 Jun 2009 12:00:00 +0000
Affected Products: SUSE SLES 9
Novell Linux Desktop 9
Open Enterprise Server
Novell Linux POS 9
Vulnerability Type: remote code execution
Severity (1-10): 8
SUSE Default Package: yes
Cross-References: CVE-2009-0859, CVE-2009-1072, CVE-2009-1265
CVE-2009-1337, CVE-2009-1439

Content of This Advisory:
1) Security Vulnerability Resolved:
Linux kernel security problems
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 of the Linux kernel for SUSE Linux Enterprise Server 9
SP4 contains various bug- and two security-fixes.

The following security vulnerabilities have been fixed:
CVE-2009-1072: nfsd in the Linux kernel did not drop the CAP_MKNOD
capability before handling a user request in a thread, which allows
local users to create device nodes, as demonstrated on a filesystem
that has been exported with the root_squash option.

CVE-2009-1439: Buffer overflow in fs/cifs/connect.c in CIFS in the
Linux kernel 2.6.29 and earlier allows remote attackers to cause
a denial of service (crash) or potential code execution via a long
nativeFileSystem field in a Tree Connect response to an SMB mount
request.

This requires that kernel can be made to mount a "cifs" filesystem
from a malicious CIFS server.

CVE-2009-1337: The exit_notify function in kernel/exit.c in the Linux
kernel did not restrict exit signals when the CAP_KILL capability
is held, which allows local users to send an arbitrary signal to a
process by running a program that modifies the exit_signal field and
then uses an exec system call to launch a setuid application.

CVE-2009-0859: The shm_get_stat function in ipc/shm.c in the shm
subsystem in the Linux kernel, when CONFIG_SHMEM is disabled,
misinterprets the data type of an inode, which allows local users
to cause a denial of service (system hang) via an SHM_INFO shmctl
call, as demonstrated by running the ipcs program. (SUSE is enabling
CONFIG_SHMEM, so is by default not affected, the fix is just for
completeness).

The GCC option -fwrapv has been added to compilation to work around
potentially removing integer overflow checks.

CVE-2009-1265: Integer overflow in rose_sendmsg (sys/net/af_rose.c) in
the Linux kernel might allow attackers to obtain sensitive information
via a large length value, which causes "garbage" memory to be sent.


For the normal bugfixes please review the RPM changelog.

2) Solution or Work-Around

There is no known workaround, please install the update packages.

3) Special Instructions and Notes

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

to apply the update, replacing 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/index.jsp?search=Search&set_restricted=true&keywords=da42ab1c030899314548fc2b5e5fbf9b

SUSE CORE 9 for IBM zSeries 64bit
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=76e5e57de6307272db0ff310ec87c1d7

SUSE CORE 9 for IBM S/390 31bit
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=44f06b667195e8117d6bb191a31de5e8

SUSE CORE 9 for IBM POWER
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=7ba691449b5b522a31220b0c55f5e954

Open Enterprise Server
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=21e76be75d3a330f9158c3dee8f8717e

Novell Linux Desktop 9 for x86
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=21e76be75d3a330f9158c3dee8f8717e

SUSE CORE 9 for Itanium Processor Family
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=afc0a77961e126742a1b72868508d13e

Novell Linux POS 9
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=8dd483721f3e24368457b8684991c59c

SUSE SLES 9
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=da42ab1c030899314548fc2b5e5fbf9b
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=76e5e57de6307272db0ff310ec87c1d7
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=44f06b667195e8117d6bb191a31de5e8
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=7ba691449b5b522a31220b0c55f5e954
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=afc0a77961e126742a1b72868508d13e
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=8dd483721f3e24368457b8684991c59c

SUSE CORE 9 for x86
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=8dd483721f3e24368457b8684991c59c

Novell Linux Desktop 9
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=21e76be75d3a330f9158c3dee8f8717e
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=0709473b0d187d0b5e8b2119619bb4ec

Novell Linux Desktop 9 for x86_64
http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=0709473b0d187d0b5e8b2119619bb4ec

______________________________________________________________________________

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

replacing with the name of the file where you saved the
announcement. The output for a valid signature looks like:

gpg: Signature made using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team "

where 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

to verify the signature of the package, replacing 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-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
.

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

Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key