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AUSCERT External Security Bulletin Redistribution
ESB-2013.1678
Moderate: dracut security, bug fix, and enhancement update
22 November 2013
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: dracut
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2012-4453
Reference: ESB-2013.1661
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2013-1674.html
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Red Hat Security Advisory
Synopsis: Moderate: dracut security, bug fix, and enhancement update
Advisory ID: RHSA-2013:1674-02
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1674.html
Issue date: 2013-11-21
CVE Names: CVE-2012-4453
=====================================================================
1. Summary:
Updated dracut packages that fix one security issue, several bugs, and add
two enhancements are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 6) - noarch
Red Hat Enterprise Linux Desktop Optional (v. 6) - noarch
Red Hat Enterprise Linux HPC Node (v. 6) - noarch
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch
Red Hat Enterprise Linux Server (v. 6) - noarch
Red Hat Enterprise Linux Server Optional (v. 6) - noarch
Red Hat Enterprise Linux Workstation (v. 6) - noarch
Red Hat Enterprise Linux Workstation Optional (v. 6) - noarch
3. Description:
The dracut packages include an event-driven initramfs generator
infrastructure based on the udev device manager. The virtual file system,
initramfs, is loaded together with the kernel at boot time and initializes
the system, so it can read and boot from the root partition.
It was discovered that dracut created initramfs images as world readable.
A local user could possibly use this flaw to obtain sensitive information
from these files, such as iSCSI authentication passwords, encrypted root
file system crypttab passwords, or other information. (CVE-2012-4453)
This issue was discovered by Peter Jones of the Red Hat Installer Team.
These updated dracut packages include numerous bug fixes and two
enhancements. Space precludes documenting all of these changes in this
advisory. Users are directed to the Red Hat Enterprise Linux 6.5 Technical
Notes, linked to in the References, for information on the most significant
of these changes.
All dracut users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues and add these
enhancements.
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/site/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
610462 - mkinitrd has no man page
720684 - Booting with snapshot of / requires non user-friendly config
859448 - CVE-2012-4453 dracut: Creates initramfs images with world-readable permissions (information disclosure)
912299 - kernel installation fails if GREP_OPTIONS is set
1012626 - [FIPS140] dracut-fip updates needed for certification
1019104 - Interface renaming via ifname does not work for RHEL-6.5
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-004-336.el6.noarch.rpm
dracut-fips-004-336.el6.noarch.rpm
dracut-kernel-004-336.el6.noarch.rpm
dracut-network-004-336.el6.noarch.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-caps-004-336.el6.noarch.rpm
dracut-fips-aesni-004-336.el6.noarch.rpm
dracut-generic-004-336.el6.noarch.rpm
dracut-tools-004-336.el6.noarch.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-004-336.el6.noarch.rpm
dracut-fips-004-336.el6.noarch.rpm
dracut-kernel-004-336.el6.noarch.rpm
dracut-network-004-336.el6.noarch.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-caps-004-336.el6.noarch.rpm
dracut-fips-aesni-004-336.el6.noarch.rpm
dracut-generic-004-336.el6.noarch.rpm
dracut-tools-004-336.el6.noarch.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-004-336.el6.noarch.rpm
dracut-fips-004-336.el6.noarch.rpm
dracut-kernel-004-336.el6.noarch.rpm
dracut-network-004-336.el6.noarch.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-caps-004-336.el6.noarch.rpm
dracut-fips-aesni-004-336.el6.noarch.rpm
dracut-generic-004-336.el6.noarch.rpm
dracut-tools-004-336.el6.noarch.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-004-336.el6.noarch.rpm
dracut-fips-004-336.el6.noarch.rpm
dracut-kernel-004-336.el6.noarch.rpm
dracut-network-004-336.el6.noarch.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dracut-004-336.el6.src.rpm
noarch:
dracut-caps-004-336.el6.noarch.rpm
dracut-fips-aesni-004-336.el6.noarch.rpm
dracut-generic-004-336.el6.noarch.rpm
dracut-tools-004-336.el6.noarch.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-2012-4453.html
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.5_Technical_Notes/dracut.html#RHSA-2013-1674
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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