-----BEGIN PGP SIGNED MESSAGE----- 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=a2be52185ebaeba245a1c8aff0... http://download.novell.com/patch/finder/?keywords=4f2403980de031813f91f813b6... http://download.novell.com/patch/finder/?keywords=8c7d79d86d626d9e405009e617... http://download.novell.com/patch/finder/?keywords=14f999b2da14400252037984b1... SUSE Linux Enterprise Server 10 SP3 http://download.novell.com/patch/finder/?keywords=a2be52185ebaeba245a1c8aff0... http://download.novell.com/patch/finder/?keywords=a70d925c5736ccbb5c46bf7c01... http://download.novell.com/patch/finder/?keywords=4f2403980de031813f91f813b6... http://download.novell.com/patch/finder/?keywords=8c7d79d86d626d9e405009e617... http://download.novell.com/patch/finder/?keywords=14f999b2da14400252037984b1... ______________________________________________________________________________ 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. 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