After vendor patches are installed, it is necessary to rebuild executables that are statically linked. A. Install Sendmail Version 8.7.3. Careful consideration should be given to requirements and installation options, and entensive testing should be performed prior to site-wide deployment. A. Make a backup copy of the sendmail binary. Patching binary files is not always successful and you will need to be able to recover.
Some vendors currently have patches available while others are in the process.
Please check with your vendor and install patches when they are available. Below is information received from vendors concerning the vulnerability described in this advisory. If you do not see your vendor's name, please contact the vendor directly for information. In addition to vendor information, note that the freely available Linux with libc version 4.7.2, released May 1995, is not vulnerable. Sendmail version 8.7.3 is not vulnerable.