## Chargen, Echo, Time, and Daytime Vulnerabilities

### Risk Factor: 3

### Machines Affected:

UNIXes without these services shut off.

### Description:

These ports can be used to create an infinite loop between them (ex. sending chargen[port 19] over to the echo port), generating a lot of network traffic.

### Consequences:

Network traffic will become so congested (within a matter of seconds) that other packets trying trying to pass by this point will just time out and die.

### Fix:

Turn off these services. There are some packages available for Linux that will keep chargen and echo from sending data to certain ports which might cause an infinite loop.