Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2011.0959
SUSE Security Announcement: Linux kernel (SUSE-SA:2011:040)
21 September 2011
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: SUSE
Operating System: SUSE
Impact/Access: Increased Privileges -- Existing Account
Access Privileged Data -- Console/Physical
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2011-3191 CVE-2011-2496 CVE-2011-2491
CVE-2011-2182 CVE-2011-2022 CVE-2011-1776
CVE-2011-1746 CVE-2011-1745 CVE-2011-1585
CVE-2011-1093 CVE-2011-1017 CVE-2011-0726
Reference: ESB-2011.0903
ESB-2011.0844
ESB-2011.0771
ESB-2011.0681
ESB-2011.0536
ESB-2011.0487
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Hash: SHA1
______________________________________________________________________________
SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2011:040
Date: Tue, 20 Sep 2011 16:00:00 +0000
Affected Products: SLE SDK 10 SP3
SUSE Linux Enterprise Server 10 SP3
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-2011-0726, CVE-2011-1017, CVE-2011-1093
CVE-2011-1585, CVE-2011-1745, CVE-2011-1746
CVE-2011-1776, CVE-2011-2022, CVE-2011-2182
CVE-2011-2491, CVE-2011-2496, CVE-2011-3191
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
This kernel update for the SUSE Linux Enterprise 10 SP3 kernel fixes
several security issues and bugs.
Following security issues were fixed:
CVE-2011-3191: A signedness issue in CIFS could possibly have lead
to to memory corruption, if a malicious server could send crafted
replies to the host.
CVE-2011-1776: Timo Warns reported an issue in the Linux implementation
for GUID partitions. Users with physical access could gain access to
sensitive kernel memory by adding a storage device with a specially
crafted corrupted invalid partition table.
CVE-2011-1093: The dccp_rcv_state_process function in net/dccp/input.c
in the Datagram Congestion Control Protocol (DCCP) implementation
in the Linux kernel did not properly handle packets for a CLOSED
endpoint, which allowed remote attackers to cause a denial of service
(NULL pointer dereference and OOPS) by sending a DCCP-Close packet
followed by a DCCP-Reset packet.
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-2011-1746: 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 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-2011-2022: The agp_generic_remove_memory function in
drivers/char/agp/generic.c in the Linux kernel before 2.6.38.5 did
not validate a certain start parameter, which allowed local users
to gain privileges or cause a denial of service (system crash) via a
crafted AGPIOC_UNBIND agp_ioctl ioctl call, a different vulnerability
than CVE-2011-1745.
CVE-2011-0726: The do_task_stat function in fs/proc/array.c in the
Linux kernel did not perform an expected uid check, which made it
easier for local users to defeat the ASLR protection mechanism by
reading the start_code and end_code fields in the /proc/#####/stat
file for a process executing a PIE binary.
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-2011-1017,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-2011-1585: When using a setuid root mount.cifs, local users could
hijack password protected mounted CIFS shares of other local users.
Also following non-security bugs were fixed:
- patches.suse/fs-proc-vmcorec-add-hook-to-read_from_oldmem-to-check-for-non-ram-pages.patch:
fs/proc/vmcore.c: add hook to read_from_oldmem() to check
for non-ram pages (bnc#684297).
- patches.xen/1062-xenbus-dev-leak.patch: xenbus: Fix memory leak on release.
- patches.xen/1074-xenbus_conn-type.patch: xenbus: fix type
inconsistency with xenbus_conn().
- patches.xen/1080-blkfront-xenbus-gather-format.patch: blkfront: fix
data size for xenbus_gather in connect().
- patches.xen/1081-blkback-resize-transaction-end.patch: xenbus: fix
xenbus_transaction_start() hang caused by double xenbus_transaction_end().
- patches.xen/1089-blkback-barrier-check.patch: blkback: dont fail
empty barrier requests.
- patches.xen/1091-xenbus-dev-no-BUG.patch: xenbus: dont BUG() on user
mode induced conditions (bnc#696107).
- patches.xen/1098-blkfront-cdrom-ioctl-check.patch: blkfront: avoid
NULL de-reference in CDROM ioctl handling (bnc#701355).
- patches.xen/1102-x86-max-contig-order.patch: x86: use dynamically
adjusted upper bound for contiguous regions (bnc#635880).
- patches.xen/xen3-x86-sanitize-user-specified-e820-memmap-values.patch:
x86: sanitize user specified e820 memmap values (bnc#665543).
- patches.fixes/libiscsi-dont-run-scsi-eh-if-iscsi-task-is-making-progress:
Fix typo, which was uncovered in debug mode.
- patches.fixes/pacct-fix-sighand-siglock-usage.patch: Fix
sighand->siglock usage in kernel/acct.c (bnc#705463).
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.
If you are using XEN, you also should install and boot the current
SUSE Linux Enterprise 10 SP3 XEN 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:
SLE SDK 10 SP3
http://download.novell.com/patch/finder/?keywords=a2be52185ebaeba245a1c8aff0c659e2
http://download.novell.com/patch/finder/?keywords=4f2403980de031813f91f813b6171179
http://download.novell.com/patch/finder/?keywords=8c7d79d86d626d9e405009e6174cabd5
http://download.novell.com/patch/finder/?keywords=14f999b2da14400252037984b14f317a
SUSE Linux Enterprise Server 10 SP3
http://download.novell.com/patch/finder/?keywords=a2be52185ebaeba245a1c8aff0c659e2
http://download.novell.com/patch/finder/?keywords=a70d925c5736ccbb5c46bf7c01dfdfb6
http://download.novell.com/patch/finder/?keywords=4f2403980de031813f91f813b6171179
http://download.novell.com/patch/finder/?keywords=8c7d79d86d626d9e405009e6174cabd5
http://download.novell.com/patch/finder/?keywords=14f999b2da14400252037984b14f317a
______________________________________________________________________________
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 <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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