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______________________________________________________________________________
SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2008:051
Date: Tue, 21 Oct 2008 10:00:00 +0000
Affected Products: SLE SDK 10 SP2
SUSE Linux Enterprise Desktop 10 SP2
SUSE Linux Enterprise 10 SP2 DEBUGINFO
SUSE Linux Enterprise Server 10 SP2
Vulnerability Type: local privilege escalation
Severity (1-10): 6
SUSE Default Package: yes
Cross-References: CVE-2007-6716, CVE-2008-1514, CVE-2008-3525
CVE-2008-3528, CVE-2008-4210
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 kernel update for SUSE Linux Enterprise 10 Service Pack 2 fixes
various bugs and some security problems:
CVE-2008-4210: When creating a file, open()/creat() allowed the setgid
bit to be set via the mode argument even when, due to the bsdgroups
mount option or the file being created in a setgid directory, the new
file's group is one which the user is not a member of. The local
attacker could then use ftruncate() and memory-mapped I/O to turn
the new file into an arbitrary binary and thus gain the privileges
of this group, since these operations do not clear the setgid bit."
CVE-2008-3528: The ext[234] filesystem code fails to properly handle
corrupted data structures. With a mounted filesystem image or partition
that have corrupted dir->i_size and dir->i_blocks, a user performing
either a read or write operation on the mounted image or partition
can lead to a possible denial of service by spamming the logfile.
CVE-2008-1514: The S/390 ptrace code allowed local users to cause
a denial of service (kernel panic) via the user-area-padding test
from the ptrace test suite in 31-bit mode, which triggers an invalid
dereference.
CVE-2007-6716: fs/direct-io.c in the dio subsystem in the Linux kernel
did not properly zero out the dio struct, which allows local users
to cause a denial of service (OOPS), as demonstrated by a certain
fio test.
CVE-2008-3525: Added missing capability checks in sbni_ioctl().
Also OCFS2 was updated to version v1.4.1-1.
The full amount of changes can be reviewed in the RPM changelog.
2) Solution or Work-Around
There is no known workaround, please install the update packages.
3) Special Instructions and Notes
Please restart the computer 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 Linux Enterprise Desktop 10 SP2 for AMD64 and Intel EM64T
http://download.novell.com/index.jsp?search=Search&keywords=51097d5d388421c6b5752d422c0c672a
SUSE Linux Enterprise 10 SP2 DEBUGINFO for IBM zSeries 64bit
http://download.novell.com/index.jsp?search=Search&keywords=71c0e4af01f2f5e4bd0f9f51370dcde8
SUSE Linux Enterprise 10 SP2 DEBUGINFO for IBM POWER
http://download.novell.com/index.jsp?search=Search&keywords=112e2d60fade685e1d5878ae21ce2bc0
SUSE Linux Enterprise 10 SP2 DEBUGINFO for IPF
http://download.novell.com/index.jsp?search=Search&keywords=f8a0975219658ddcd214ea7538810b92
SUSE Linux Enterprise Server 10 SP2
http://download.novell.com/index.jsp?search=Search&keywords=51097d5d388421c6b5752d422c0c672a
http://download.novell.com/index.jsp?search=Search&keywords=71c0e4af01f2f5e4bd0f9f51370dcde8
http://download.novell.com/index.jsp?search=Search&keywords=112e2d60fade685e1d5878ae21ce2bc0
http://download.novell.com/index.jsp?search=Search&keywords=f8a0975219658ddcd214ea7538810b92
http://download.novell.com/index.jsp?search=Search&keywords=1f60f6114b5878d38c45087bbe9d5f99
SLE SDK 10 SP2
http://download.novell.com/index.jsp?search=Search&keywords=51097d5d388421c6b5752d422c0c672a
http://download.novell.com/index.jsp?search=Search&keywords=112e2d60fade685e1d5878ae21ce2bc0
http://download.novell.com/index.jsp?search=Search&keywords=f8a0975219658ddcd214ea7538810b92
http://download.novell.com/index.jsp?search=Search&keywords=1f60f6114b5878d38c45087bbe9d5f99
SUSE Linux Enterprise 10 SP2 DEBUGINFO
http://download.novell.com/index.jsp?search=Search&keywords=51097d5d388421c6b5752d422c0c672a
http://download.novell.com/index.jsp?search=Search&keywords=112e2d60fade685e1d5878ae21ce2bc0
http://download.novell.com/index.jsp?search=Search&keywords=f8a0975219658ddcd214ea7538810b92
http://download.novell.com/index.jsp?search=Search&keywords=1f60f6114b5878d38c45087bbe9d5f99
SUSE Linux Enterprise Desktop 10 SP2
http://download.novell.com/index.jsp?search=Search&keywords=51097d5d388421c6b5752d422c0c672a
http://download.novell.com/index.jsp?search=Search&keywords=1f60f6114b5878d38c45087bbe9d5f99
SUSE Linux Enterprise Desktop 10 SP2 for x86
http://download.novell.com/index.jsp?search=Search&keywords=1f60f6114b5878d38c45087bbe9d5f99
______________________________________________________________________________
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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