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8.11. busybox

Updated busybox packages that fix one security issue and several bugs are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link associated with the description below.
BusyBox provides a single binary that includes versions of a large number of system commands, including a shell. This can be very useful for recovering from certain types of system failures, particularly those involving broken shared libraries.

Security Fix

It was found that the mdev BusyBox utility could create certain directories within /dev with world-writable permissions. A local unprivileged user could use this flaw to manipulate portions of the /dev directory tree.

Bug Fixes

Previously, due to a too eager string size optimization on the IBM System z architecture, the "wc" BusyBox command failed after processing standard input with the following error:
wc: : No such file or directory
This bug was fixed by disabling the string size optimization and the "wc" command works properly on IBM System z architectures.
Prior to this update, the "mknod" command was unable to create device nodes with a major or minor number larger than 255. Consequently, the kdump utility failed to handle such a device. The underlying source code has been modified, and it is now possible to use the "mknod" command to create device nodes with a major or minor number larger than 255.
If a network installation from an NFS server was selected, the "mount" command used the UDP protocol by default. If only TCP mounts were supported by the server, this led to a failure of the mount command. As a result, Anaconda could not continue with the installation. This bug is now fixed and NFS mount operations default to the TCP protocol.
All busybox users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.