RHSA-2017:1483: Important: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operatingsystem.Security Fix(es): A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regionswere adjacent to each other, an attacker could use this flaw to jump over thestack guard gap, cause controlled memory corruption on process stack or theadjacent memory region, and thus increase their privileges on the system. Thisis a kernel-side mitigation which increases the stack guard gap size from onepage to 1 MiB to make successful exploitation of this issue more difficult.(CVE-2017-1000364, Important)Red Hat would like to thank Qualys Research Labs for reporting this issue.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/kernelto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debuginfo-commonto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-develto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-docto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xento a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xen-debuginfoto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xen-develto a version that resolves this vulnerability.Fixed in 2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernelto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-PAEto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-PAE-debuginfoto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-PAE-develto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-debuginfo-commonto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-develto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-docto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xento a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xen-debuginfoto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Upgrade
Upgrade
redhat/kernel-xen-develto a version that resolves this vulnerability.Fixed in 0:2.6.18-348.33.2.el5 - Operational
Reboot the system for the kernel security update to take effect.
Event History
Frequently Asked Questions
What is the severity of RHSA-2017:1483?
The severity of RHSA-2017:1483 is classified as important.
How do I fix RHSA-2017:1483?
To fix RHSA-2017:1483, you should upgrade the kernel packages to version 2.6.18-348.33.2.el5 or later.
Which systems are affected by RHSA-2017:1483?
RHSA-2017:1483 affects systems running specific versions of the Red Hat Enterprise Linux kernel.
What are the implications of the vulnerability in RHSA-2017:1483?
The vulnerability in RHSA-2017:1483 could allow a local user to potentially exploit stack memory allocation flaws.
Is there a workaround for RHSA-2017:1483 before applying the fix?
There are no specific workarounds recommended for RHSA-2017:1483, and applying the fix is advised.