Product SiteDocumentation Site

1.229.  udev

1.229.1.  RHSA-2009:0427: Important security update


This update has already been released (prior to the GA of this release) as the security errata RHSA-2009:0427
Updated udev packages that fix one security issue are now available for Red Hat Enterprise Linux 5.
This update has been rated as having important security impact by the Red Hat Security Response Team.
udev provides a user-space API and implements a dynamic device directory, providing only the devices present on the system. udev replaces devfs in order to provide greater hot plug functionality. Netlink is a datagram oriented service, used to transfer information between kernel modules and user-space processes.
It was discovered that udev did not properly check the origin of Netlink messages. A local attacker could use this flaw to gain root privileges via a crafted Netlink message sent to udev, causing it to create a world-writable block device file for an existing system block device (for example, the root file system). (CVE-2009-1185)
Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for responsibly reporting this flaw.
Users of udev are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, the udevd daemon will be restarted automatically.

1.229.2.  RHBA-2009:1346: bug fix and enhancement update

Updated udev packages that fix a bug and add an enhancement are now available.
The udev packages implement a dynamic device-directory, providing only the devices present on the system. This dynamic directory runs in user-space, dynamically creates and removes devices, provides consistent naming, and a user-space API. udev replaces devfs, providing greater hot plug functionality.
These updated packages fix the following bug:
  • leftover queue files from the udev instance of the initrd, caused a stall in the udev started from rc.sysinit. In this update the files are removed before starting the daemon in rc.sysinit. (BZ#487858)
These updated packages add the following enhancement:
  • scsi_id was extended to query the ID of cciss devices, which do not provide information in the /sys filesystem. This enables the creation of persistent symbolic links in /dev/disk for cciss devices. (BZ#449057)
Users of udev are advised to upgrade to these updated packages, which resolve this issue and add this enhancement.

Note: This documentation is provided {and copyrighted} by Red Hat®, Inc. and is released via the Open Publication License. The copyright holder has added the further requirement that Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. The CentOS project redistributes these original works (in their unmodified form) as a reference for CentOS-5 because CentOS-5 is built from publicly available, open source SRPMS. The documentation is unmodified to be compliant with upstream distribution policy. Neither CentOS-5 nor the CentOS Project are in any way affiliated with or sponsored by Red Hat®, Inc.