drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in Linux
Name: |
Pufferüberlauf in Linux |
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ID: |
RHSA-2017:2760-01 |
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Distribution: |
Red Hat |
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Plattformen: |
Red Hat Enterprise Linux |
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Datum: |
Di, 19. September 2017, 12:04 |
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Referenzen: |
https://access.redhat.com/security/cve/CVE-2016-1583 |
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Applikationen: |
Linux |
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Originalnachricht |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2017:2760-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:2760 Issue date: 2017-09-19 CVE Names: CVE-2016-1583 =====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6.7 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. 6.7) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* It was found that stacking a file system over procfs in the Linux kernel could lead to a kernel stack overflow due to deep nesting, as demonstrated by mounting ecryptfs over procfs and creating a recursion by mapping /proc/environ. An unprivileged, local user could potentially use this flaw to escalate their privileges on the system. (CVE-2016-1583, Important)
Bug Fix(es):
* Previously, while the MAP_GROWSDOWN flag was set, writing to the memory which was mapped with the mmap system call failed with the SIGBUS signal. This update fixes memory management in the Linux kernel by backporting an upstream patch that enlarges the stack guard page gap. As a result, mmap now works as expected under the described circumstances. (BZ#1474721)
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/):
1344721 - CVE-2016-1583 kernel: Stack overflow via ecryptfs and /proc/$pid/environ
6. Package List:
Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source: kernel-2.6.32-573.47.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-573.47.1.el6.noarch.rpm kernel-doc-2.6.32-573.47.1.el6.noarch.rpm kernel-firmware-2.6.32-573.47.1.el6.noarch.rpm
x86_64: kernel-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.47.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.47.1.el6.x86_64.rpm kernel-devel-2.6.32-573.47.1.el6.x86_64.rpm kernel-headers-2.6.32-573.47.1.el6.x86_64.rpm perf-2.6.32-573.47.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64: kernel-debug-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-573.47.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm python-perf-2.6.32-573.47.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.7):
Source: kernel-2.6.32-573.47.1.el6.src.rpm
i386: kernel-2.6.32-573.47.1.el6.i686.rpm kernel-debug-2.6.32-573.47.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-573.47.1.el6.i686.rpm kernel-devel-2.6.32-573.47.1.el6.i686.rpm kernel-headers-2.6.32-573.47.1.el6.i686.rpm perf-2.6.32-573.47.1.el6.i686.rpm perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm
noarch: kernel-abi-whitelists-2.6.32-573.47.1.el6.noarch.rpm kernel-doc-2.6.32-573.47.1.el6.noarch.rpm kernel-firmware-2.6.32-573.47.1.el6.noarch.rpm
ppc64: kernel-2.6.32-573.47.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-573.47.1.el6.ppc64.rpm kernel-debug-2.6.32-573.47.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-573.47.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-573.47.1.el6.ppc64.rpm kernel-devel-2.6.32-573.47.1.el6.ppc64.rpm kernel-headers-2.6.32-573.47.1.el6.ppc64.rpm perf-2.6.32-573.47.1.el6.ppc64.rpm perf-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm
s390x: kernel-2.6.32-573.47.1.el6.s390x.rpm kernel-debug-2.6.32-573.47.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.s390x.rpm kernel-debug-devel-2.6.32-573.47.1.el6.s390x.rpm kernel-debuginfo-2.6.32-573.47.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-573.47.1.el6.s390x.rpm kernel-devel-2.6.32-573.47.1.el6.s390x.rpm kernel-headers-2.6.32-573.47.1.el6.s390x.rpm kernel-kdump-2.6.32-573.47.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-573.47.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-573.47.1.el6.s390x.rpm perf-2.6.32-573.47.1.el6.s390x.rpm perf-debuginfo-2.6.32-573.47.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.s390x.rpm
x86_64: kernel-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.47.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.47.1.el6.x86_64.rpm kernel-devel-2.6.32-573.47.1.el6.x86_64.rpm kernel-headers-2.6.32-573.47.1.el6.x86_64.rpm perf-2.6.32-573.47.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.7):
i386: kernel-debug-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.47.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-573.47.1.el6.i686.rpm perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm python-perf-2.6.32-573.47.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.i686.rpm
ppc64: kernel-debug-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-573.47.1.el6.ppc64.rpm perf-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm python-perf-2.6.32-573.47.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.ppc64.rpm
s390x: kernel-debug-debuginfo-2.6.32-573.47.1.el6.s390x.rpm kernel-debuginfo-2.6.32-573.47.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-573.47.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-573.47.1.el6.s390x.rpm perf-debuginfo-2.6.32-573.47.1.el6.s390x.rpm python-perf-2.6.32-573.47.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-573.47.1.el6.s390x.rpm
x86_64: kernel-debug-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-573.47.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.47.1.el6.x86_64.rpm python-perf-2.6.32-573.47.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.47.1.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-2016-1583 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 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1
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