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Sicherheit: Ausführen von Code mit höheren Privilegien in Linux
Aktuelle Meldungen Distributionen
Name: Ausführen von Code mit höheren Privilegien in Linux
ID: RHSA-2016:1640-01
Distribution: Red Hat
Plattformen: Red Hat Enterprise Linux
Datum: Fr, 19. August 2016, 18:36
Referenzen: https://access.redhat.com/security/cve/CVE-2016-4565

Originalnachricht

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

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2016:1640-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1640.html
Issue date: 2016-08-19
CVE Names: CVE-2016-4565
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.6
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, noarch, ppc64, s390x,
x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, ppc64, s390x,
x86_64

3. Description:

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

Security Fix(es):

* A flaw was found in the way certain interfaces of the Linux kernel's
Infiniband subsystem used write() as bi-directional ioctl() replacement,
which could lead to insufficient memory security checks when being invoked
using the splice() system call. A local unprivileged user on a system with
either Infiniband hardware present or RDMA Userspace Connection Manager
Access module explicitly loaded, could use this flaw to escalate their
privileges on the system. (CVE-2016-4565, Important)

Red Hat would like to thank Jann Horn for reporting this issue.

Bug Fix(es):

* After upgrading the kernel, the CPU load average was higher compared to
the prior kernel version due to the modification of the scheduler. The
provided patchset rolls back the calculation algorithm of the load average
to the status of the previous system version, thus resulting in lower
values in the same system load. (BZ#1343013)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

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

1310570 - CVE-2016-4565 kernel: infiniband: Unprivileged process can overwrite
kernel memory using rdma_ucm.ko

6. Package List:

Red Hat Enterprise Linux HPC Node EUS (v. 6.6):

Source:
kernel-2.6.32-504.51.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.51.1.el6.noarch.rpm
kernel-doc-2.6.32-504.51.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.51.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.51.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.51.1.el6.x86_64.rpm
perf-2.6.32-504.51.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):

x86_64:
kernel-debug-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.51.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 6.6):

Source:
kernel-2.6.32-504.51.1.el6.src.rpm

i386:
kernel-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-504.51.1.el6.i686.rpm
kernel-devel-2.6.32-504.51.1.el6.i686.rpm
kernel-headers-2.6.32-504.51.1.el6.i686.rpm
perf-2.6.32-504.51.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.51.1.el6.noarch.rpm
kernel-doc-2.6.32-504.51.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.51.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-504.51.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debug-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-504.51.1.el6.ppc64.rpm
kernel-devel-2.6.32-504.51.1.el6.ppc64.rpm
kernel-headers-2.6.32-504.51.1.el6.ppc64.rpm
perf-2.6.32-504.51.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-504.51.1.el6.s390x.rpm
kernel-debug-2.6.32-504.51.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-504.51.1.el6.s390x.rpm
kernel-devel-2.6.32-504.51.1.el6.s390x.rpm
kernel-headers-2.6.32-504.51.1.el6.s390x.rpm
kernel-kdump-2.6.32-504.51.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-504.51.1.el6.s390x.rpm
perf-2.6.32-504.51.1.el6.s390x.rpm
perf-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.51.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.51.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.51.1.el6.x86_64.rpm
perf-2.6.32-504.51.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 6.6):

i386:
kernel-debug-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-504.51.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm
python-perf-2.6.32-504.51.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-504.51.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm
python-perf-2.6.32-504.51.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-504.51.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
perf-debuginfo-2.6.32-504.51.1.el6.s390x.rpm
python-perf-2.6.32-504.51.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.51.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-2.6.32-504.51.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.51.1.el6.x86_64.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://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-4565
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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