ESB-2017.1816 - [RedHat] kernel: Access privileged data - Existing account 2017-07-25

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1816
                     Important: kernel security update
                               25 July 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-7895  

Reference:         ESB-2017.1808
                   ESB-2017.1798
                   ESB-2017.1768
                   ESB-2017.1723

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2017:1798

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2017:1798-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:1798
Issue date:        2017-07-24
CVE Names:         CVE-2017-7895 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.6
Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended
Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 6.6) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 6.6) - noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* The NFSv2 and NFSv3 server implementations in the Linux kernel through
4.10.13 lacked certain checks for the end of a buffer. A remote attacker
could trigger a pointer-arithmetic error or possibly cause other
unspecified impacts using crafted requests related to fs/nfsd/nfs3xdr.c and
fs/nfsd/nfsxdr.c. (CVE-2017-7895, Important)

Red Hat would like to thank Ari Kauppi for reporting this issue.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

1446103 - CVE-2017-7895 kernel: NFSv3 server does not properly handle payload bounds checking of WRITE requests

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.6):

Source:
kernel-2.6.32-504.62.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.62.1.el6.noarch.rpm
kernel-doc-2.6.32-504.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.62.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.62.1.el6.x86_64.rpm
perf-2.6.32-504.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 6.6):

Source:
kernel-2.6.32-504.62.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.62.1.el6.noarch.rpm
kernel-doc-2.6.32-504.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.62.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.62.1.el6.x86_64.rpm
perf-2.6.32-504.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.6):

x86_64:
kernel-debug-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 6.6):

x86_64:
kernel-debug-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-2.6.32-504.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.62.1.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-7895
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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