Dear SCO Customer, The enclosed Support Level Supplement (SLS) PTF3063, the exec() System Call Security Supplement, corrects the problem where the exec() system call may take inappropriate action based on the permissions of a file. Software Notes and Recommendations ---------------------------------- SLS PTF3063 should only be installed on SCO UnixWare Application Server Release 2.1.0 and SCO UnixWare Personal Edition Release 2.1.0. Installation Instructions ------------------------- 1. Download the ptf3063.Z and ptf3063.txt files to the /tmp directory on your machine. 2. As root, uncompress the file and add the package to your system using these commands: $ su # uncompress /tmp/ptf3063.Z # mv /tmp/ptf3063 /tmp/ptf3063.s # cat /tmp/ptf3063.s | pkgadd -d - 3. Reboot the system after installing this SLS. A new unix kernel will be built and the system will then reboot itself. Removal Instructions --------------------- 1. As root, remove the package. $su # pkgrm ptf3063 2. Reboot the system after removing this SLS. If you have questions regarding this SLS, or the product on which it is installed, please contact your software supplier. We appreciate your business. SCO Support Services