Multiple buffer overflows in xymond/xymond.c in xymond in Xymon 4.1.x, 4.2.x, and 4.3.x before 4.3.25 allow remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a long filename, involving handling a "config" command.
https://sourceforge.net/p/xymon/code/7860/
https://sourceforge.net/p/xymon/code/7859/
http://www.securityfocus.com/archive/1/537522/100/0/threaded