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Red Hat 6.7: RHSA-2017:0316-01 Important: DCCP Exploit Fix

red hat
Calendar Grey February 23, 2017
Scroller Redhat
Kernel vulnerability patch and update for Red Hat Enterprise Linux 6.7 categorized as critical by Red Hat security team.
An update for kernel is now available for Red Hat Enterprise Linux 6.7 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 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)
Red Hat would like to thank Andrey Konovalov (Google) for reporting this issue.
Bug Fix(es):
* When an NFS server received a compound Remote Procedure Call (RPC) with multiple operations where the SECINFO operation was the ninth or later operation, the server terminated unexpectedly. This update fixes the NFS server to correctly initialize all arguments of all compound RPC operations that are beyond the first eight operations. As a result, the NFS server no longer crashes in the described situation. (BZ#1413035)

Topics%20covered

Topics Covered

security advisory Red Hat kernel exploit kernel bug fix Important severity DCCP issue

References

https://access.redhat.com/security/cve/CVE-2017-6074 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source: kernel-2.6.32-573.40.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-573.40.1.el6.noarch.rpm kernel-doc-2.6.32-573.40.1.el6.noarch.rpm kernel-firmware-2.6.32-573.40.1.el6.noarch.rpm
x86_64: kernel-2.6.32-573.40.1.el6.x86_64.rpm kernel-debug-2.6.32-573.40.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.40.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.40.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.40.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.40.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.40.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.40.1.el6.x86_64.rpm kernel-devel-2.6.32-573.40.1.el6.x86_64.rpm kernel-headers-2.6.32-573.40.1.el6.x86_64.rpm perf-2.6.32-573.40.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64: kernel-debug-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0316-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0316.html
Issue date: 2017-02-23

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.7Extended 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 Red Hat kernel exploit kernel bug fix Important severity DCCP issue

Relevant Releases Architectures

Red Hat Enterprise Linux HPC Node EUS (v. 6.7) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64

Bugs Fixed

1423071 - CVE-2017-6074 kernel: use after free in dccp protocol

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