This issue affects all kernels older then 2.6.21-rc6.
For more information:
http://www.securityfocus.com/bid/23447/info IDENTIFIER = WIND00109110
WIND00109111.zip for 1.4
WIND00109112.zip for 1.5
1. Unzip the patch under [install_dir]/updates
2. Install the patch CD by entering the patch CD directory and run setup_linux.
3. This is a source only patch so you will have to build the kernel
4. Issue a make fs and make the kernel in a configured directory.
5. Upload the kernel and rootfs into the target and boot it up.