RHSA-2017:0293: Important: kernel security update
First published: Wed Feb 22 2017(Updated: )
The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-abi-whitelists | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug-devel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug-devel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debuginfo-common-i686 | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-devel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-doc | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-firmware | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-headers | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/perf | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/perf-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/perf-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/python-perf | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/python-perf-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/python-perf-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debug | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-devel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-headers | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/perf | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/python-perf | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debuginfo-common-s390x | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-kdump | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-kdump-debuginfo | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-kdump-devel | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-bootwrapper | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
| redhat/kernel-debuginfo-common-ppc64 | <2.6.32-642.13.2.el6 | 2.6.32-642.13.2.el6 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2017:0293?
The severity of RHSA-2017:0293 is classified as important due to a use-after-free vulnerability in the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation.
How do I fix RHSA-2017:0293?
To fix RHSA-2017:0293, update your Linux kernel to version 2.6.32-642.13.2.el6 or later.
What packages are affected by RHSA-2017:0293?
Affected packages include kernel, kernel-debug, kernel-devel, and several kernel-debugging related packages in the specified versions.
What is a use-after-free vulnerability in RHSA-2017:0293?
A use-after-free vulnerability occurs when a program continues to use a memory resource after it has been freed, which can lead to unpredictable behavior or exploitation.
Is RHSA-2017:0293 applicable to all Linux distributions?
No, RHSA-2017:0293 specifically applies to Red Hat Enterprise Linux systems running the affected kernel versions.
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