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Alerts This Week
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Red Hat 7.1 RHSA-2017:0270-01 Important: Kernel Use-After-Free Exploit

red hat
Calendar Grey February 15, 2017
Scroller Redhat
Critical kernel upgrade for Red Hat Enterprise Linux 7.1 addresses significant security flaws and issues, including remote code execution (RCE) risks.
An update for kernel is now available for Red Hat Enterprise Linux 7.1 Extended Update Support

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.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* A use-after-free vulnerability was found in the kernel's socket recvmmsg subsystem. This may allow remote attackers to corrupt memory and may allow execution of arbitrary code. This corruption takes place during the error handling routines within __sys_recvmmsg() function. (CVE-2016-7117, Important)
Bug Fix(es):
* Previously, an XFS corruption in some cases occurred on Seagate 8TB drive based volumes after a planned system shutdown or reboot, when a disk write back cache was used. With this update, the megaraid_sas driver has been fixed and the XFS corruption no longer occurs in the described scenario. (BZ#1398177)
* Previously, booting a kdump kernel in some cases failed with this error:
Kernel panic - not syncing: Watchdog detected hard LOCKUP on CPU 0.
This update ensures that the hpet timer software counters, including hpet_default_delta and hpet_t1_cmp, are initialized before an interrupt request is registered, and the kdump kernel now boots without the mentioned error message. (BZ#1404180)

Topics%20covered

Topics Covered

security advisory kernel update bug fix Red Hat Enterprise Linux remote execution important use-after-free

References

https://access.redhat.com/security/cve/CVE-2016-7117 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1):
Source: kernel-3.10.0-229.48.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-229.48.1.el7.noarch.rpm kernel-doc-3.10.0-229.48.1.el7.noarch.rpm
x86_64: kernel-3.10.0-229.48.1.el7.x86_64.rpm kernel-debug-3.10.0-229.48.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-229.48.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.48.1.el7.x86_64.rpm kernel-devel-3.10.0-229.48.1.el7.x86_64.rpm kernel-headers-3.10.0-229.48.1.el7.x86_64.rpm kernel-tools-3.10.0-229.48.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-229.48.1.el7.x86_64.rpm perf-3.10.0-229.48.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1):
x86_64: kernel-debug-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.48.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-229.48.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.48.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0270-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0270.html
Issue date: 2017-02-15

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.1Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory kernel update bug fix Red Hat Enterprise Linux remote execution important use-after-free

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.1) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1382268 - CVE-2016-7117 kernel: Use-after-free in the recvmmsg exit path

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