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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2015:0695-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2015:0695.html
Issue date:        2015-03-17
CVE Names:         CVE-2013-2596 CVE-2014-5471 CVE-2014-5472 
                   CVE-2014-7841 CVE-2014-8159 
====================================================================
1. Summary:

Updated kernel packages that fix multiple security issues and two bugs are
now available for Red Hat Enterprise Linux 6.2 Advanced Update Support.

Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AUS (v. 6.2 server) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64

3. Description:

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

* A flaw was found in the way the Linux kernel's SCTP implementation
validated INIT chunks when performing Address Configuration Change
(ASCONF). A remote attacker could use this flaw to crash the system by
sending a specially crafted SCTP packet to trigger a NULL pointer
dereference on the system. (CVE-2014-7841, Important)

* It was found that the Linux kernel's Infiniband subsystem did not
properly sanitize input parameters while registering memory regions from
user space via the (u)verbs API. A local user with access to a
/dev/infiniband/uverbsX device could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-8159,
Important)

* An integer overflow flaw was found in the way the Linux kernel's Frame
Buffer device implementation mapped kernel memory to user space via the
mmap syscall. A local user able to access a frame buffer device file
(/dev/fb*) could possibly use this flaw to escalate their privileges on the
system. (CVE-2013-2596, Important)

* It was found that the parse_rock_ridge_inode_internal() function of the
Linux kernel's ISOFS implementation did not correctly check relocated
directories when processing Rock Ridge child link (CL) tags. An attacker
with physical access to the system could use a specially crafted ISO image
to crash the system or, potentially, escalate their privileges on the
system. (CVE-2014-5471, CVE-2014-5472, Low)

Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
The CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.

This update also fixes the following bugs:

* Previously, certain network device drivers did not accept ethtool
commands right after they were loaded. As a consequence, the current
setting of the specified device driver was not applied and an error message
was returned. The ETHTOOL_DELAY variable has been added, which makes sure
the ethtool utility waits for some time before it tries to apply the
options settings, thus fixing the bug. (BZ#1138299)

* During the memory allocation for a new socket to communicate to the
server, the rpciod daemon released a clean page which needed to be
committed. However, the commit was queueing indefinitely as the commit
could only be provided with a socket connection. As a consequence, a
deadlock occurred in rpciod. This update sets the PF_FSTRANS flag on the
work queue task prior to the socket allocation, and adds the
nfs_release_page check for the flag when deciding whether to make a commit
call, thus fixing this bug. (BZ#1192326)

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1034490 - CVE-2013-2596 kernel: integer overflow in fb_mmap
1134099 - CVE-2014-5471 CVE-2014-5472 kernel: isofs: unbound recursion when processing relocated directories
1163087 - CVE-2014-7841 kernel: net: sctp: NULL pointer dereference in af->from_addr_param on malformed packet
1181166 - CVE-2014-8159 kernel: infiniband: uverbs: unprotected physical memory access

6. Package List:

Red Hat Enterprise Linux AUS (v. 6.2 server):

Source:
kernel-2.6.32-220.60.2.el6.src.rpm

noarch:
kernel-doc-2.6.32-220.60.2.el6.noarch.rpm
kernel-firmware-2.6.32-220.60.2.el6.noarch.rpm

x86_64:
kernel-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debug-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.60.2.el6.x86_64.rpm
kernel-devel-2.6.32-220.60.2.el6.x86_64.rpm
kernel-headers-2.6.32-220.60.2.el6.x86_64.rpm
perf-2.6.32-220.60.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.2):

Source:
kernel-2.6.32-220.60.2.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.60.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm
python-perf-2.6.32-220.60.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.60.2.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-2013-2596
https://access.redhat.com/security/cve/CVE-2014-5471
https://access.redhat.com/security/cve/CVE-2014-5472
https://access.redhat.com/security/cve/CVE-2014-7841
https://access.redhat.com/security/cve/CVE-2014-8159
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2015 Red Hat, Inc.