1.229. udev
1.229.1. RHSA-2009:0427: Important security update
Important
This update has already been released (prior to the GA of this release) as the security errata RHSA-2009:0427
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.
