drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Preisgabe von Informationen in Linux
Name: |
Preisgabe von Informationen in Linux |
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ID: |
RHSA-2016:1939-01 |
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Distribution: |
Red Hat |
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Plattformen: |
Red Hat Enterprise Linux |
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Datum: |
Di, 27. September 2016, 23:09 |
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Referenzen: |
https://access.redhat.com/security/cve/CVE-2016-5696 |
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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-2016:1939-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1939.html Issue date: 2016-09-27 CVE Names: CVE-2016-5696 =====================================================================
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):
* It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network. (CVE-2016-5696, Important)
Red Hat would like to thank Yue Cao (Cyber Security Group of the CS department of University of California in Riverside) 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#1365163)
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/):
1354708 - CVE-2016-5696 kernel: challenge ACK counter information disclosure.
6. Package List:
Red Hat Enterprise Linux HPC Node EUS (v. 6.6):
Source: kernel-2.6.32-504.52.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-504.52.1.el6.noarch.rpm kernel-doc-2.6.32-504.52.1.el6.noarch.rpm kernel-firmware-2.6.32-504.52.1.el6.noarch.rpm
x86_64: kernel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm kernel-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-headers-2.6.32-504.52.1.el6.x86_64.rpm perf-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):
x86_64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.6):
Source: kernel-2.6.32-504.52.1.el6.src.rpm
i386: kernel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-devel-2.6.32-504.52.1.el6.i686.rpm kernel-headers-2.6.32-504.52.1.el6.i686.rpm perf-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm
noarch: kernel-abi-whitelists-2.6.32-504.52.1.el6.noarch.rpm kernel-doc-2.6.32-504.52.1.el6.noarch.rpm kernel-firmware-2.6.32-504.52.1.el6.noarch.rpm
ppc64: kernel-2.6.32-504.52.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-504.52.1.el6.ppc64.rpm kernel-devel-2.6.32-504.52.1.el6.ppc64.rpm kernel-headers-2.6.32-504.52.1.el6.ppc64.rpm perf-2.6.32-504.52.1.el6.ppc64.rpm perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm
s390x: kernel-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debug-devel-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-504.52.1.el6.s390x.rpm kernel-devel-2.6.32-504.52.1.el6.s390x.rpm kernel-headers-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-504.52.1.el6.s390x.rpm perf-2.6.32-504.52.1.el6.s390x.rpm perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm
x86_64: kernel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.52.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm kernel-devel-2.6.32-504.52.1.el6.x86_64.rpm kernel-headers-2.6.32-504.52.1.el6.x86_64.rpm perf-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.6):
i386: kernel-debug-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.52.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-504.52.1.el6.i686.rpm perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm python-perf-2.6.32-504.52.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.i686.rpm
ppc64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-504.52.1.el6.ppc64.rpm perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm python-perf-2.6.32-504.52.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.ppc64.rpm
s390x: kernel-debug-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-2.6.32-504.52.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-504.52.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-504.52.1.el6.s390x.rpm perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm python-perf-2.6.32-504.52.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-504.52.1.el6.s390x.rpm
x86_64: kernel-debug-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-504.52.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.52.1.el6.x86_64.rpm python-perf-2.6.32-504.52.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.52.1.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-2016-5696 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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