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Alerts This Week
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Red Hat Enterprise Linux 7 RHSA-2016:2098-01 Critical Privilege Escalation

red hat
Calendar Grey October 24, 2016
Scroller Redhat
The Debian security notification has issued significant updates addressing vulnerabilities in packages. Urgent measures recommended.
An update for kernel is now available for Red Hat Enterprise Linux 7

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 race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. (CVE-2016-5195, Important)
Red Hat would like to thank Phil Oester for reporting this issue.

Topics%20covered

Topics Covered

security advisory kernel update critical privilege escalation Red Hat Enterprise Linux important memory subsystem

References

https://access.redhat.com/security/cve/CVE-2016-5195 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/DirtyCow

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-327.36.3.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-327.36.3.el7.noarch.rpm kernel-doc-3.10.0-327.36.3.el7.noarch.rpm
x86_64: kernel-3.10.0-327.36.3.el7.x86_64.rpm kernel-debug-3.10.0-327.36.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.36.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.36.3.el7.x86_64.rpm kernel-devel-3.10.0-327.36.3.el7.x86_64.rpm kernel-headers-3.10.0-327.36.3.el7.x86_64.rpm kernel-tools-3.10.0-327.36.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.36.3.el7.x86_64.rpm perf-3.10.0-327.36.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm python-perf-3.10.0-327.36.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.36.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.36.3.el7.x86_64.rpm perf-debuginfo-3.10.0-327.36.3.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2098-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2098.html
Issue date: 2016-10-24

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.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 critical privilege escalation Red Hat Enterprise Linux important memory subsystem

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1384344 - CVE-2016-5195 kernel: mm: privilege escalation via MAP_PRIVATE COW breakage

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