drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in RT-Preempt-Realtime-Patch
Name: |
Mehrere Probleme in RT-Preempt-Realtime-Patch |
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ID: |
RHSA-2018:0152-01 |
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Distribution: |
Red Hat |
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Plattformen: |
Red Hat Enterprise Linux |
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Datum: |
Do, 25. Januar 2018, 13:10 |
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Referenzen: |
https://access.redhat.com/security/cve/CVE-2017-15649
https://access.redhat.com/security/cve/CVE-2017-7472
https://access.redhat.com/security/cve/CVE-2015-8539 |
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Applikationen: |
RT-Preempt-Realtime-Patch |
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Originalnachricht |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2018:0152-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:0152 Issue date: 2018-01-25 CVE Names: CVE-2015-8539 CVE-2017-7472 CVE-2017-15649 =====================================================================
1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise Linux 7.
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 Realtime (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64
3. Description:
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* A flaw was found in the Linux kernel's key management system where it was possible for an attacker to escalate privileges or crash the machine. If a user key gets negatively instantiated, an error code is cached in the payload area. A negatively instantiated key may be then be positively instantiated by updating it with valid data. However, the ->update key type method must be aware that the error code may be there. (CVE-2015-8539, Important)
* It was found that fanout_add() in 'net/packet/af_packet.c' in the Linux kernel, before version 4.13.6, allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free bug. (CVE-2017-15649, Important)
* A vulnerability was found in the Linux kernel where the keyctl_set_reqkey_keyring() function leaks the thread keyring. This allows an unprivileged local user to exhaust kernel memory and thus cause a DoS. (CVE-2017-7472, Moderate)
Red Hat would like to thank Dmitry Vyukov of Google engineering for reporting CVE-2015-8539.
Bug Fix(es):
* The kernel-rt packages have been upgraded to 3.10.0-693.15.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1519506)
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/):
1284450 - CVE-2015-8539 kernel: local privesc in key management 1442086 - CVE-2017-7472 kernel: keyctl_set_reqkey_keyring() leaks thread keyrings 1504574 - CVE-2017-15649 kernel: Use-after-free in the af_packet.c 1519506 - kernel-rt: update to the RHEL7.4.z batch#4 source tree
6. Package List:
Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-693.17.1.rt56.636.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-693.17.1.rt56.636.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-devel-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-kvm-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-693.17.1.rt56.636.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-693.17.1.rt56.636.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-devel-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-693.17.1.rt56.636.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-693.17.1.rt56.636.el7.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-2015-8539 https://access.redhat.com/security/cve/CVE-2017-7472 https://access.redhat.com/security/cve/CVE-2017-15649 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 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1
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