FreeBSD 代码问题漏洞

FreeBSD is a set of Unix-like operating systems from the Freebsd Foundation. A security vulnerability exists in FreeBSD 8.0, 6.3, 4.9, and OpenBSD 4.6, which stems from a null pointer dereference in ftpd/popen.c, and could lead to a remote denial of service of the ftpd service...