CVE-2007-3304
Apache httpd 1.3.37, 2.0.59, and 2.2.4 with the Prefork MPM module, allows local users to cause a denial of service by modifying the worker_score and process_score arrays to reference an arbitrary process ID, which is sent a SIGUSR1 signal from the master process, aka "SIGUSR1 killer."
Date published : 2007-06-20
http://www-1.ibm.com/support/search.wss?rs=0&q=PK50467&apar=only