[RedHat] Schwachstelle im Red Hat Linux Kernel

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Liebe Kolleginnen und Kollegen,

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

CVE-2010-3081 – Schwachstelle im Linux Kernel der x86_64 Architektur

Im Linux Kernel fuer die x86_64 Architektur wird bei der Emulation
eines IA32 der Wert des Stack-Pointers falsch in einen 64-Bit Wert
konvertiert. Dabei kann es zu einem Underflow des Stackpointers kommen
was dazu fuehrt, dass dieser in den Speicherbereich des Kernels zeigt.
Da keine Ueberpruefung des Wertes des Stackpointers durchgefuehrt wird,
bleibt der Fehler unbemerkt und erlaubt es einem lokalen Angreifer
Daten in den Speicherbereich des Kernels zu schreiben und mit dessen
Rechten auszufuehren.

Bitte beachten Sie, dass bereits ein Exploit fuer diese Schwachstelle
veroeffentlicht wurde.

Betroffen sind die folgenden Software Pakete und Plattformen:

Paket 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.

(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

Automatische Warnmeldungen https://www.cert.dfn.de/autowarn

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

Synopsis: Important: kernel security update
Advisory ID: RHSA-2010:0704-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0704.html
Issue date: 2010-09-21
CVE Names: CVE-2010-3081
=====================================================================

1. Summary:

Updated kernel packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link 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 issue:

* The compat_alloc_user_space() function in the Linux kernel 32/64-bit
compatibility layer implementation was missing sanity checks. This function
could be abused in other areas of the Linux kernel if its length argument
can be controlled from user-space. On 64-bit systems, a local, unprivileged
user could use this flaw to escalate their privileges. (CVE-2010-3081,
Important)

Red Hat would like to thank Ben Hawkes for reporting this issue.

Red Hat is aware that a public exploit for this issue is available. Refer
to Knowledgebase article DOC-40265 for further details:
https://access.redhat.com/kb/docs/DOC-40265

Users should upgrade to these updated packages, which contain a backported
patch to correct this issue. 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/):

634457 – CVE-2010-3081 kernel: 64-bit Compatibility Mode Stack Pointer Underflow

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-2.6.18-194.11.4.el5.src.rpm

i386:
kernel-2.6.18-194.11.4.el5.i686.rpm
kernel-PAE-2.6.18-194.11.4.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-194.11.4.el5.i686.rpm
kernel-PAE-devel-2.6.18-194.11.4.el5.i686.rpm
kernel-debug-2.6.18-194.11.4.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-194.11.4.el5.i686.rpm
kernel-debug-devel-2.6.18-194.11.4.el5.i686.rpm
kernel-debuginfo-2.6.18-194.11.4.el5.i686.rpm
kernel-debuginfo-common-2.6.18-194.11.4.el5.i686.rpm
kernel-devel-2.6.18-194.11.4.el5.i686.rpm
kernel-headers-2.6.18-194.11.4.el5.i386.rpm
kernel-xen-2.6.18-194.11.4.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-194.11.4.el5.i686.rpm
kernel-xen-devel-2.6.18-194.11.4.el5.i686.rpm

noarch:
kernel-doc-2.6.18-194.11.4.el5.noarch.rpm

x86_64:
kernel-2.6.18-194.11.4.el5.x86_64.rpm
kernel-debug-2.6.18-194.11.4.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-194.11.4.el5.x86_64.rpm
kernel-debug-devel-2.6.18-194.11.4.el5.x86_64.rpm
kernel-debuginfo-2.6.18-194.11.4.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-194.11.4.el5.x86_64.rpm
kernel-devel-2.6.18-194.11.4.el5.x86_64.rpm
kernel-headers-2.6.18-194.11.4.el5.x86_64.rpm
kernel-xen-2.6.18-194.11.4.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-194.11.4.el5.x86_64.rpm
kernel-xen-devel-2.6.18-194.11.4.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-2.6.18-194.11.4.el5.src.rpm

ia64:
kernel-2.6.18-194.11.4.el5.ia64.rpm
kernel-debug-2.6.18-194.11.4.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-194.11.4.el5.ia64.rpm
kernel-debug-devel-2.6.18-194.11.4.el5.ia64.rpm
kernel-debuginfo-2.6.18-194.11.4.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-194.11.4.el5.ia64.rpm
kernel-devel-2.6.18-194.11.4.el5.ia64.rpm
kernel-headers-2.6.18-194.11.4.el5.ia64.rpm
kernel-xen-2.6.18-194.11.4.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-194.11.4.el5.ia64.rpm
kernel-xen-devel-2.6.18-194.11.4.el5.ia64.rpm

noarch:
kernel-doc-2.6.18-194.11.4.el5.noarch.rpm

ppc:
kernel-2.6.18-194.11.4.el5.ppc64.rpm
kernel-debug-2.6.18-194.11.4.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-194.11.4.el5.ppc64.rpm
kernel-debug-devel-2.6.18-194.11.4.el5.ppc64.rpm
kernel-debuginfo-2.6.18-194.11.4.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-194.11.4.el5.ppc64.rpm
kernel-devel-2.6.18-194.11.4.el5.ppc64.rpm
kernel-headers-2.6.18-194.11.4.el5.ppc.rpm
kernel-headers-2.6.18-194.11.4.el5.ppc64.rpm
kernel-kdump-2.6.18-194.11.4.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-194.11.4.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-194.11.4.el5.ppc64.rpm

s390x:
kernel-2.6.18-194.11.4.el5.s390x.rpm
kernel-debug-2.6.18-194.11.4.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-194.11.4.el5.s390x.rpm
kernel-debug-devel-2.6.18-194.11.4.el5.s390x.rpm
kernel-debuginfo-2.6.18-194.11.4.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-194.11.4.el5.s390x.rpm
kernel-devel-2.6.18-194.11.4.el5.s390x.rpm
kernel-headers-2.6.18-194.11.4.el5.s390x.rpm
kernel-kdump-2.6.18-194.11.4.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-194.11.4.el5.s390x.rpm
kernel-kdump-devel-2.6.18-194.11.4.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-2010-3081.html
http://www.redhat.com/security/updates/classification/#important
https://access.redhat.com/kb/docs/DOC-40265

8. Contact:

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

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[RedHat] Schwachstelle im Red Hat Linux Kernel - RHSA-2010:0704-01

LMP003 Chemnitzer Linux-Tage 2026

[RedHat] Schwachstelle im Red Hat Linux Kernel – RHSA-2010:0704-01

[RedHat] Schwachstelle im Red Hat Linux Kernel - RHSA-2010:0704-01