McAfee 5 manual McAfee Firewall, Attack, Description, Risk, Factor

McAfee Firewall

Common attacks recognized by IDS

The following table lists attacks recognized by McAfee Firewall’s IDS, a description of each attack, and the risk factor assigned to each attack.

Attack	Description	Risk
		Factor
1234	Also known as the Flushot attack, an attacker sends an oversize ping	Medium
	packet that networking software could not handle. Usually, computers
	hang or slows down. If a total lockup occurs, unsaved data may be lost.
Back Orifice	Back Orifice is a back door program for Windows 9x written by a group	High
	calling themselves the Cult of the Dead Cow. This back door allows
	remote access to the machine once installed, allowing the installer to run
	commands, get screen shots, modify the registry, and perform other
	operations. Client programs to access Back Orifice are available for
	Windows and UNIX.
Bonk	Designed to exploit an implementation error in the first Teardrop patch	High
	released by Microsoft, this attack is basically a Windows-specific variant of
	the original Teardrop attack.
Fraggle	This attack is a UDP variant of the Smurf attack. By sending a forged UDP	High
	packet to a particular port on a broadcast address, systems on the
	“amplifier” network will respond to the target machine with either a UDP
	response or an ICMP UNREACHABLE packet. This flood of incoming
	packets results in a denial of service attack against the target machine.
IP Spoofing	IP spoofing involves sending data with a falsified return IP address. There	Medium
	is nothing inherently dangerous about spoofing a source IP address, but
	this technique can be used in conjunction with others to carry out attacks
	TCP session hijacking, or to obscure the source of denial of service
	attacks (SYN flood, PING flood, etc.).
Jolt	A remote denial of service attack using specially crafted ICMP packet	High
	fragments. May cause slowdowns or crashes on target systems.
Jolt 2	A remote Denial of Service (DoS) attack similar to Jolt that uses specially	High
	crafted ICMP or UDP packet fragments. May cause slowdowns or crashes
	on target systems.
Land	This attack is performed by sending a TCP packet to a running service on	High
	the target host, with a source address of the same host. The TCP packet
	is a SYN packet, used to establish a new connection, and is sent from the
	same TCP source port as the destination port. When accepted by the
	target host, this packet causes a loop within the operating system,
	essentially locking up the system.
Nestea	This attack relies on an error in calculating sizes during packet fragment	High
	reassembly. In the reassembly routine of vulnerable systems, there was a
	failure to account for the length of the IP header field. By sending carefully
	crafted packets to a vulnerable system, it is possible to crash the target.

86 McAfee Internet Security 5.0