[RedHat] Mehrere Schwachstellen im Linux Kernel fuer RedHat Enterprise Linux 5

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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

CVE-2010-0307 – Schwachstelle im Linux Kernel

Die Ausfuehrung von 32-bit Programmen auf 64-bit Systemen erfolgt nicht
korrekt. Versucht ein 32-bit Programm ein 64-bit Programm mittels
execve() auszufuehren, kann die Funktion load_elf_binary()
(aus:fs/binfmt_elf.c) einen Segmentation fault ausloesen, der zu einem
Absturz des Systems fuehrt. Ein lokaler Angreifer kann diese
Schwachstelle fuer einen Denial of Service ausnutzen.

CVE-2010-0730 – Schwachstelle im Xen Hypervisor

Die im Xen Hypervisor enthaltene Implementierung des Instruction
Decoders enthaelt einen Fehler aufgrund dessen bestimmte Instruktionen
nicht richtig uebersetzt werden, was zu Abstuerzen eines virtualisierten
Gastsystems fuehren kann. Betroffen hiervon sind Funktionen, welche auf
Speicherbereiche zugreifen, die fuer Memory Mapped IO genutzt werden.
Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um einen
Denial of Service Angriff auf betroffene Systeme durchzufuehren.

CVE-2010-1086 – Denial of Service Schwachstelle im Linux ULE Decoder

Im ULE Decoder des Linux Kernels befindet sich eine nicht naeher
beschriebene Schwachstelle. Ein entfernter Angreifer kann diese ueber
das Netz zu einem Denial of Service Angriff ausnutzen, indem er
entsprechend aufgebaute DVB Pakete an das betroffene System sendet.

CVE-2010-0410 – Schwachstelle im Linux Userspace – Kernelspace Connector

Der Linux Userspace – Kernelspace Connector
(drivers/connector/connector.c) sendet unter bestimmten Umstaenden
zuviele NETLINK_CONNECTOR Nachrichten an den Kernel, wodurch der freie
Hauptspeicher aufgebraucht wird und in Folge Prozesse beendet werden
oder das System abstuerzt. Lokale Angreifer koennen diese Schwachstelle
zu einem Denial of Service Angriff gegen das System ausnutzen.

CVE-2010-1085 – Schwachstelle im Intel HD Audio Treiber

Eine Schwachstelle im Treiber fuer Intel HD Audio Geraete fuehrt unter
Umstaenden dazu, dass bei einer Berechnung eine Division durch Null
auftritt, was einen Absturz des Systems ausloest. Ein lokaler Angreifer
kann die Schwachstelle ausnutzen um einen Denial of Service Angriff
auf dem betroffenen System durchzufuehren.

Betroffen sind die folgenden Software Pakete und Plattformen:

Kernel

Red Hat Enterprise Linux (v. 5 server) – i386, ia64, noarch, ppc,
s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, noarch, x86_64

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
https://rhn.redhat.com/errata/RHSA-2010-0398.html

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
Michael Groening, DFN-CERT
– —

Michael Groening (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-590
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2010:0398-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0398.html
Issue date: 2010-05-06
CVE Names: CVE-2010-0307 CVE-2010-0410 CVE-2010-0730
CVE-2010-1085 CVE-2010-1086
=====================================================================

1. Summary:

Updated kernel packages that fix multiple security issues and several bugs
are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) – i386, ia64, noarch, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

* a flaw was found in the Unidirectional Lightweight Encapsulation (ULE)
implementation. A remote attacker could send a specially-crafted ISO
MPEG-2 Transport Stream (TS) frame to a target system, resulting in an
infinite loop (denial of service). (CVE-2010-1086, Important)

* on AMD64 systems, it was discovered that the kernel did not ensure the
ELF interpreter was available before making a call to the SET_PERSONALITY
macro. A local attacker could use this flaw to cause a denial of service by
running a 32-bit application that attempts to execute a 64-bit application.
(CVE-2010-0307, Moderate)

* a flaw was found in the kernel connector implementation. A local,
unprivileged user could trigger this flaw by sending an arbitrary number
of notification requests using specially-crafted netlink messages,
resulting in a denial of service. (CVE-2010-0410, Moderate)

* a flaw was found in the Memory-mapped I/O (MMIO) instruction decoder in
the Xen hypervisor implementation. An unprivileged guest user could use
this flaw to trick the hypervisor into emulating a certain instruction,
which could crash the guest (denial of service). (CVE-2010-0730, Moderate)

* a divide-by-zero flaw was found in the azx_position_ok() function in the
driver for Intel High Definition Audio, snd-hda-intel. A local,
unprivileged user could trigger this flaw to cause a kernel crash (denial
of service). (CVE-2010-1085, Moderate)

This update also fixes the following bugs:

* in some cases, booting a system with the “iommu=on” kernel parameter
resulted in a Xen hypervisor panic. (BZ#580199)

* the fnic driver flushed the Rx queue instead of the Tx queue after
fabric login. This caused crashes in some cases. (BZ#580829)

* “kernel unaligned access” warnings were logged to the dmesg log on some
systems. (BZ#580832)

* the “Northbridge Error, node 1, core: -1 K8 ECC error” error occurred on
some systems using the amd64_edac driver. (BZ#580836)

* in rare circumstances, when using kdump and booting a kernel with
“crashkernel=128M@16M”, the kdump kernel did not boot after a crash.
(BZ#580838)

* TLB page table entry flushing was done incorrectly on IBM System z,
possibly causing crashes, subtle data inconsistency, or other issues.
(BZ#580839)

* iSCSI failover times were slower than in Red Hat Enterprise Linux 5.3.
(BZ#580840)

* fixed floating point state corruption after signal. (BZ#580841)

* in certain circumstances, under heavy load, certain network interface
cards using the bnx2 driver and configured to use MSI-X, could stop
processing interrupts and then network connectivity would cease.
(BZ#587799)

* cnic parts resets could cause a deadlock when the bnx2 device was
enslaved in a bonding device and that device had an associated VLAN.
(BZ#581148)

* some BIOS implementations initialized interrupt remapping hardware in a
way the Xen hypervisor implementation did not expect. This could have
caused a system hang during boot. (BZ#581150)

* AMD Magny-Cours systems panicked when booting a 32-bit kernel.
(BZ#580846)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

To install kernel packages manually, use “rpm -ivh [package]”. Do not
use “rpm -Uvh” as that will remove the running kernel binaries from
your system. You may use “rpm -e” to remove old kernels after
determining that the new kernel functions properly on your system.

5. Bugs fixed (http://bugzilla.redhat.com/):

560547 – CVE-2010-0307 kernel: DoS on x86_64
561682 – CVE-2010-0410 kernel: OOM/crash in drivers/connector
567168 – CVE-2010-1085 kernel: ALSA: hda-intel: Avoid divide by zero crash
569237 – CVE-2010-1086 kernel: dvb-core: DoS bug in ULE decapsulation code
572971 – CVE-2010-0730 xen: emulator instruction decoding inconsistency
580199 – xen: clear ioapic registers on boot [rhel-5.5.z]
580829 – [Cisco 5.6 bug] fnic: flush Tx queue bug fix [rhel-5.5.z]
580832 – kernel unaligned messages from mptsas_firmware_event_work [rhel-5.5.z]
580836 – EDAC driver error on system with bad memory [rhel-5.5.z]
580838 – [5.4]System panic occurred during boot sequence with the server which carries 256GMB physical memory. [rhel-5.5.z]
580839 – kernel: correct TLB flush of page table entries concurrently used by another cpu [rhel-5.5.z]
580840 – REGRESSION: Fix iscsi failover time [rhel-5.5.z]
580841 – floating point register state corruption after handling SIGSEGV [rhel-5.5.z]
581148 – Kernel: network: bonding: scheduling while atomic: ifdown-eth/0x00000100/21775 [rhel-5.5.z]
581150 – [Intel 5.6 Virt Bug] [VT-d] Dom0 booting may hang on Westmere-EP with intremap enabled [rhel-5.5.z]
587799 – NIC doesn’t register packets [rhel-5.5.z]

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kernel-2.6.18-194.3.1.el5.src.rpm

i386:
kernel-2.6.18-194.3.1.el5.i686.rpm
kernel-PAE-2.6.18-194.3.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-194.3.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-194.3.1.el5.i686.rpm
kernel-debug-2.6.18-194.3.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-194.3.1.el5.i686.rpm
kernel-debug-devel-2.6.18-194.3.1.el5.i686.rpm
kernel-debuginfo-2.6.18-194.3.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-194.3.1.el5.i686.rpm
kernel-devel-2.6.18-194.3.1.el5.i686.rpm
kernel-headers-2.6.18-194.3.1.el5.i386.rpm
kernel-xen-2.6.18-194.3.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-194.3.1.el5.i686.rpm
kernel-xen-devel-2.6.18-194.3.1.el5.i686.rpm

noarch:
kernel-doc-2.6.18-194.3.1.el5.noarch.rpm

x86_64:
kernel-2.6.18-194.3.1.el5.x86_64.rpm
kernel-debug-2.6.18-194.3.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-194.3.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-194.3.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-194.3.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-194.3.1.el5.x86_64.rpm
kernel-devel-2.6.18-194.3.1.el5.x86_64.rpm
kernel-headers-2.6.18-194.3.1.el5.x86_64.rpm
kernel-xen-2.6.18-194.3.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-194.3.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-194.3.1.el5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kernel-2.6.18-194.3.1.el5.src.rpm

ia64:
kernel-2.6.18-194.3.1.el5.ia64.rpm
kernel-debug-2.6.18-194.3.1.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-194.3.1.el5.ia64.rpm
kernel-debug-devel-2.6.18-194.3.1.el5.ia64.rpm
kernel-debuginfo-2.6.18-194.3.1.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-194.3.1.el5.ia64.rpm
kernel-devel-2.6.18-194.3.1.el5.ia64.rpm
kernel-headers-2.6.18-194.3.1.el5.ia64.rpm
kernel-xen-2.6.18-194.3.1.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-194.3.1.el5.ia64.rpm
kernel-xen-devel-2.6.18-194.3.1.el5.ia64.rpm

noarch:
kernel-doc-2.6.18-194.3.1.el5.noarch.rpm

ppc:
kernel-2.6.18-194.3.1.el5.ppc64.rpm
kernel-debug-2.6.18-194.3.1.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-194.3.1.el5.ppc64.rpm
kernel-debug-devel-2.6.18-194.3.1.el5.ppc64.rpm
kernel-debuginfo-2.6.18-194.3.1.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-194.3.1.el5.ppc64.rpm
kernel-devel-2.6.18-194.3.1.el5.ppc64.rpm
kernel-headers-2.6.18-194.3.1.el5.ppc.rpm
kernel-headers-2.6.18-194.3.1.el5.ppc64.rpm
kernel-kdump-2.6.18-194.3.1.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-194.3.1.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-194.3.1.el5.ppc64.rpm

s390x:
kernel-2.6.18-194.3.1.el5.s390x.rpm
kernel-debug-2.6.18-194.3.1.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-194.3.1.el5.s390x.rpm
kernel-debug-devel-2.6.18-194.3.1.el5.s390x.rpm
kernel-debuginfo-2.6.18-194.3.1.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-194.3.1.el5.s390x.rpm
kernel-devel-2.6.18-194.3.1.el5.s390x.rpm
kernel-headers-2.6.18-194.3.1.el5.s390x.rpm
kernel-kdump-2.6.18-194.3.1.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-194.3.1.el5.s390x.rpm
kernel-kdump-devel-2.6.18-194.3.1.el5.s390x.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-0307.html
https://www.redhat.com/security/data/cve/CVE-2010-0410.html
https://www.redhat.com/security/data/cve/CVE-2010-0730.html
https://www.redhat.com/security/data/cve/CVE-2010-1085.html
https://www.redhat.com/security/data/cve/CVE-2010-1086.html
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is . More contact
details at https://www.redhat.com/security/team/contact/

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[RedHat] Mehrere Schwachstellen im Linux Kernel fuer RedHat Enterprise Linux 5 - RHSA-2010:0398-01

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[RedHat] Mehrere Schwachstellen im Linux Kernel fuer RedHat Enterprise Linux 5 – RHSA-2010:0398-01

[RedHat] Mehrere Schwachstellen im Linux Kernel fuer RedHat Enterprise Linux 5 - RHSA-2010:0398-01