CVE-1999-0821

This exploit targets a buffer overflow vulnerability in Seyon 2.1 rev. 4b on Linux. It uses a crafted buffer with NOP sleds and shellcode to execute '/bin/sh' via a return address override.

This exploit leverages the setgid dialer vulnerability in Seyon on FreeBSD 3.3-RELEASE to elevate privileges to the dialer group. It demonstrates a simple method to execute arbitrary code with elevated group permissions via the -emulator argument.