StandardCAPEC-496
CAPEC-496: ICMP Fragmentation
Description
An attacker may execute a ICMP Fragmentation attack against a target with the intention of consuming resources or causing a crash. The attacker crafts a large number of identical fragmented IP packets containing a portion of a fragmented ICMP message. The attacker these sends these messages to a target host which causes the host to become non-responsive. Another vector may be sending a fragmented ICMP message to a target host with incorrect sizes in the header which causes the host to hang.
- Likelihood of attack
- Not rated by MITRE
- Typical severity
- Not rated by MITRE
- Abstraction
- StandardA specific methodology or technique used in an attack.
Mechanism of attack: Abuse Existing Functionality
Prerequisites
- This type of an attack requires the target system to be running a vulnerable implementation of IP, and the attacker needs to ability to send arbitrary sized ICMP packets to the target.
Mitigations
- This attack may be mitigated through egress filtering based on ICMP payload so a network is a good neighbor to other networks. Bad IP implementations become patched, so using the proper version of a browser or OS is recommended.