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Red Hat: 2013:1674-02 Moderate: Dracut Information Disclosure Fix

red hat
Calendar Grey November 21, 2013
Dist Redhat Esm H88
Revised dracut modules for Fedora tackle vulnerabilities, fix errors, and introduce improvements to bolster system integrity and performance.
Updated dracut packages that fix one security issue, several bugs, and add two enhancements are now available for Red Hat Enterprise Linux 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix moderate severity information disclosure dracut

References

https://access.redhat.com/security/cve/CVE-2012-4453 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

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
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:
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:
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:
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:
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:
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:
noarch:

Read the Full Advisory


Advisory ID: RHSA-2013:1674-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:1674.html
Issue date: 2013-11-21

Topic

Updated dracut packages that fix one security issue, several bugs, and addtwo enhancements are now available for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix moderate severity information disclosure dracut

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

Bugs Fixed

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

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