Home / mailings [RHSA-2014:0801-01] Important: kernel security update
Posted on 26 June 2014
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Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2014:0801-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0801.html
Issue date: 2014-06-26
CVE Names: CVE-2014-1737 CVE-2014-1738
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1. Summary:
Updated kernel packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.6 Long Life.
The Red Hat Security Response Team 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 LL (v. 5.6 server) - i386, ia64, noarch, 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 floppy driver handled user
space provided data in certain error code paths while processing FDRAWCMD
IOCTL commands. A local user with write access to /dev/fdX could use this
flaw to free (using the kfree() function) arbitrary kernel memory.
(CVE-2014-1737, Important)
* It was found that the Linux kernel's floppy driver leaked internal kernel
memory addresses to user space during the processing of the FDRAWCMD IOCTL
command. A local user with write access to /dev/fdX could use this flaw to
obtain information about the kernel heap arrangement. (CVE-2014-1738, Low)
Note: A local user with write access to /dev/fdX could use these two flaws
(CVE-2014-1737 in combination with CVE-2014-1738) to escalate their
privileges on the system.
Red Hat would like to thank Matthew Daley for reporting these issues.
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/knowledge/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/):
1094299 - CVE-2014-1737 CVE-2014-1738 kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command
6. Package List:
Red Hat Enterprise Linux LL (v. 5.6 server):
Source:
kernel-2.6.18-238.53.1.el5.src.rpm
i386:
kernel-2.6.18-238.53.1.el5.i686.rpm
kernel-PAE-2.6.18-238.53.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-238.53.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-238.53.1.el5.i686.rpm
kernel-debug-2.6.18-238.53.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-238.53.1.el5.i686.rpm
kernel-debug-devel-2.6.18-238.53.1.el5.i686.rpm
kernel-debuginfo-2.6.18-238.53.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-238.53.1.el5.i686.rpm
kernel-devel-2.6.18-238.53.1.el5.i686.rpm
kernel-headers-2.6.18-238.53.1.el5.i386.rpm
kernel-xen-2.6.18-238.53.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-238.53.1.el5.i686.rpm
kernel-xen-devel-2.6.18-238.53.1.el5.i686.rpm
ia64:
kernel-2.6.18-238.53.1.el5.ia64.rpm
kernel-debug-2.6.18-238.53.1.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-238.53.1.el5.ia64.rpm
kernel-debug-devel-2.6.18-238.53.1.el5.ia64.rpm
kernel-debuginfo-2.6.18-238.53.1.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-238.53.1.el5.ia64.rpm
kernel-devel-2.6.18-238.53.1.el5.ia64.rpm
kernel-headers-2.6.18-238.53.1.el5.ia64.rpm
kernel-xen-2.6.18-238.53.1.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-238.53.1.el5.ia64.rpm
kernel-xen-devel-2.6.18-238.53.1.el5.ia64.rpm
noarch:
kernel-doc-2.6.18-238.53.1.el5.noarch.rpm
x86_64:
kernel-2.6.18-238.53.1.el5.x86_64.rpm
kernel-debug-2.6.18-238.53.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-238.53.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-238.53.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-238.53.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-238.53.1.el5.x86_64.rpm
kernel-devel-2.6.18-238.53.1.el5.x86_64.rpm
kernel-headers-2.6.18-238.53.1.el5.x86_64.rpm
kernel-xen-2.6.18-238.53.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-238.53.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-238.53.1.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-2014-1737.html
https://www.redhat.com/security/data/cve/CVE-2014-1738.html
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 2014 Red Hat, Inc.
