Stack-based buffer overflow in sys/kern/vfs_mount.c in the kernel in FreeBSD 7.0 and 7.1, when vfs.usermount is enabled, allows local users to gain privileges via a crafted mount or nmount system call, related to copying of "user defined data" in "certain error conditions".
This module exploits a vulnerability in FreeBSD. The FreeBSD virtual memory system allows files to be memory-mapped. All or parts of a file can be made available to a process via its address space. The process can then access the file using memory operations rather than filesystem I/O calls. Due to insufficient permission checks in the virtual memory system, a tracing process (such as a debugger) may be able to modify portions of the traced process's address space to which the traced process itself does not have write access.
The FreeBSD kernel provides support for a variety of different types of communications sockets, including IPv4, IPv6, ISDN, ATM, routing protocol, link-layer, netgraph(4), and bluetooth sockets.Some function pointers for netgraph and bluetooth sockets are not properly initialized. This can be exploited to e.g. read or write to arbitrary kernel memory via a specially crafted "socket()" system call, and allows an unprivileged process to elevate privileges to root or escape a FreeBSD jail.
This module sends HTTP requests with specially crafted data making the PHP process consume lot of resources. This attack prevents the victim server from processing requests from legitimate clients and probably will make the server non-operational. The PATH parameter must point to a PHP web page, which they normally have a ".php" extension.
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