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[RHSA-2014:0926-01] Moderate: kernel security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: kernel security and bug fix update

Advisory ID: RHSA-2014:0926-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0926.html

Issue date: 2014-07-23

CVE Names: CVE-2014-2678 CVE-2014-4021

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

 

1. Summary:

 

Updated kernel packages that fix two security issues and several bugs are

now available for Red Hat Enterprise Linux 5.

 

The Red Hat Security Response Team has rated this update as having

Moderate 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 (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

* A NULL pointer dereference flaw was found in the rds_iw_laddr_check()

function in the Linux kernel's implementation of Reliable Datagram Sockets

(RDS). A local, unprivileged user could use this flaw to crash the system.

(CVE-2014-2678, Moderate)

 

* It was found that the Xen hypervisor implementation did not properly

clean memory pages previously allocated by the hypervisor. A privileged

guest user could potentially use this flaw to read data relating to other

guests or the hypervisor itself. (CVE-2014-4021, Moderate)

 

Red Hat would like to thank the Xen project for reporting CVE-2014-4021.

Upstream acknowledges Jan Beulich as the original reporter.

 

This update also fixes the following bugs:

 

* A bug in the journaling block device (jbd and jbd2) code could, under

certain circumstances, trigger a BUG_ON() assertion and result in a kernel

oops. This happened when an application performed an extensive number of

commits to the journal of the ext3 file system and there was no currently

active transaction while synchronizing the file's in-core state. This

problem has been resolved by correcting respective test conditions in the

jbd and jbd2 code. (BZ#1097528)

 

* After a statically defined gateway became unreachable and its

corresponding neighbor entry entered a FAILED state, the gateway stayed in

the FAILED state even after it became reachable again. As a consequence,

traffic was not routed through that gateway. This update allows probing

such a gateway automatically so that the traffic can be routed through

this gateway again once it becomes reachable. (BZ#1106354)

 

* Due to an incorrect condition check in the IPv6 code, the ipv6 driver

was unable to correctly assemble incoming packet fragments, which resulted

in a high IPv6 packet loss rate. This update fixes the said check for a

fragment overlap and ensures that incoming IPv6 packet fragments are now

processed as expected. (BZ#1107932)

 

* Recent changes in the d_splice_alias() function introduced a bug that

allowed d_splice_alias() to return a dentry from a different directory

than the directory being looked up. As a consequence in cluster

environment, a kernel panic could be triggered when a directory was being

removed while a concurrent cross-directory operation was performed on this

directory on another cluster node. This update avoids the kernel panic in

this situation by correcting the search logic in the d_splice_alias()

function so that the function can no longer return a dentry from an

incorrect directory. (BZ#1109720)

 

* The NFSv4 server did not handle multiple OPEN operations to the same file

separately, which could cause the NFSv4 client to repeatedly send CLOSE

requests with the same state ID, even though the NFS server rejected the

request with an NFS4ERR_OLD_STATEID (10024) error code. This update

ensures that the NFSv4 client no longer re-sends the same CLOSE request

after receiving NFS4ERR_OLD_STATEID. (BZ#1113468)

 

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.

 

This update is available via the Red Hat Network. Details on how to use the

Red Hat Network to apply this update are available at

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

 

To install kernel packages manually, use "rpm -ivh [package]". Do not use

"rpm -Uvh" as that will remove the running kernel binaries from your

system. You may use "rpm -e" to remove old kernels after determining that

the new kernel functions properly on your system.

 

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

 

1083274 - CVE-2014-2678 kernel: net: rds: dereference of a NULL device in rds_iw_laddr_check()

1103646 - CVE-2014-4021 xen: Hypervisor heap contents leaked to guests (xsa-100)

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

kernel-2.6.18-371.11.1.el5.src.rpm

 

i386:

kernel-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.i686.rpm

kernel-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-headers-2.6.18-371.11.1.el5.i386.rpm

kernel-xen-2.6.18-371.11.1.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-xen-devel-2.6.18-371.11.1.el5.i686.rpm

 

noarch:

kernel-doc-2.6.18-371.11.1.el5.noarch.rpm

 

x86_64:

kernel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.x86_64.rpm

kernel-devel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-headers-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-devel-2.6.18-371.11.1.el5.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

kernel-2.6.18-371.11.1.el5.src.rpm

 

i386:

kernel-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-PAE-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.i686.rpm

kernel-devel-2.6.18-371.11.1.el5.i686.rpm

kernel-headers-2.6.18-371.11.1.el5.i386.rpm

kernel-xen-2.6.18-371.11.1.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-371.11.1.el5.i686.rpm

kernel-xen-devel-2.6.18-371.11.1.el5.i686.rpm

 

ia64:

kernel-2.6.18-371.11.1.el5.ia64.rpm

kernel-debug-2.6.18-371.11.1.el5.ia64.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.ia64.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.ia64.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.ia64.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.ia64.rpm

kernel-devel-2.6.18-371.11.1.el5.ia64.rpm

kernel-headers-2.6.18-371.11.1.el5.ia64.rpm

kernel-xen-2.6.18-371.11.1.el5.ia64.rpm

kernel-xen-debuginfo-2.6.18-371.11.1.el5.ia64.rpm

kernel-xen-devel-2.6.18-371.11.1.el5.ia64.rpm

 

noarch:

kernel-doc-2.6.18-371.11.1.el5.noarch.rpm

 

ppc:

kernel-2.6.18-371.11.1.el5.ppc64.rpm

kernel-debug-2.6.18-371.11.1.el5.ppc64.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.ppc64.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.ppc64.rpm

kernel-devel-2.6.18-371.11.1.el5.ppc64.rpm

kernel-headers-2.6.18-371.11.1.el5.ppc.rpm

kernel-headers-2.6.18-371.11.1.el5.ppc64.rpm

kernel-kdump-2.6.18-371.11.1.el5.ppc64.rpm

kernel-kdump-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm

kernel-kdump-devel-2.6.18-371.11.1.el5.ppc64.rpm

 

s390x:

kernel-2.6.18-371.11.1.el5.s390x.rpm

kernel-debug-2.6.18-371.11.1.el5.s390x.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.s390x.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.s390x.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.s390x.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.s390x.rpm

kernel-devel-2.6.18-371.11.1.el5.s390x.rpm

kernel-headers-2.6.18-371.11.1.el5.s390x.rpm

kernel-kdump-2.6.18-371.11.1.el5.s390x.rpm

kernel-kdump-debuginfo-2.6.18-371.11.1.el5.s390x.rpm

kernel-kdump-devel-2.6.18-371.11.1.el5.s390x.rpm

 

x86_64:

kernel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debug-devel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-371.11.1.el5.x86_64.rpm

kernel-devel-2.6.18-371.11.1.el5.x86_64.rpm

kernel-headers-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm

kernel-xen-devel-2.6.18-371.11.1.el5.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/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2014-2678.html

https://www.redhat.com/security/data/cve/CVE-2014-4021.html

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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