drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Ausführen von Code mit höheren Privilegien in Linux
Name: |
Ausführen von Code mit höheren Privilegien in Linux |
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ID: |
RHSA-2016:2132-01 |
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Distribution: |
Red Hat |
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Plattformen: |
Red Hat Enterprise Linux |
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Datum: |
Di, 1. November 2016, 20:01 |
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Referenzen: |
https://access.redhat.com/security/cve/CVE-2016-5195 |
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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-2016:2132-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-2132.html Issue date: 2016-11-01 CVE Names: CVE-2016-5195 =====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6.2 Advanced 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 Server AUS (v. 6.2) - noarch, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. (CVE-2016-5195, Important)
Red Hat would like to thank Phil Oester for reporting this issue.
Bug Fix(es):
* Previously, the BUG_ON() signal appeared in the fs_clear_inode() function where the nfs_have_writebacks() function reported a positive value for nfs_inode->npages. As a consequence, a kernel panic occurred. The provided patch performs a serialization by holding the inode i_lock over the check of PagePrivate and locking the request, which fixes this bug. (BZ#1365157)
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/):
1384344 - CVE-2016-5195 kernel: mm: privilege escalation via MAP_PRIVATE COW breakage
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 6.2):
Source: kernel-2.6.32-220.68.1.el6.src.rpm
noarch: kernel-doc-2.6.32-220.68.1.el6.noarch.rpm kernel-firmware-2.6.32-220.68.1.el6.noarch.rpm
x86_64: kernel-2.6.32-220.68.1.el6.x86_64.rpm kernel-debug-2.6.32-220.68.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-220.68.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.68.1.el6.x86_64.rpm kernel-devel-2.6.32-220.68.1.el6.x86_64.rpm kernel-headers-2.6.32-220.68.1.el6.x86_64.rpm perf-2.6.32-220.68.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.2):
Source: kernel-2.6.32-220.68.1.el6.src.rpm
x86_64: kernel-debug-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.68.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.68.1.el6.x86_64.rpm python-perf-2.6.32-220.68.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.68.1.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-2016-5195 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1
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