CAPEC 설명

An attacker may execute a UDP Fragmentation attack against a target server in an attempt to consume resources such as bandwidth and CPU. IP fragmentation occurs when an IP datagram is larger than the MTU of the route the datagram has to traverse. Typically the attacker will use large UDP packets over 1500 bytes of data which forces fragmentation as ethernet MTU is 1500 bytes. This attack is a variation on a typical UDP flood but it enables more network bandwidth to be consumed with fewer packets. Additionally it has the potential to consume server CPU resources and fill memory buffers associated with the processing and reassembling of fragmented packets.

CAPEC 정보

사전 조건

This type of an attack requires the attacker to be able to generate fragmented IP traffic containing crafted data.

완화 방법

This attack may be mitigated by changing default cache sizes to be larger at the OS level. Additionally rules can be enforced to prune the cache with shorter timeouts for packet reassembly as the cache nears capacity.

관련 약점

CWE-ID	약점 이름
CWE-770	Allocation of Resources Without Limits or Throttling The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
CWE-404	Improper Resource Shutdown or Release The product does not release or incorrectly releases a resource before it is made available for re-use.

참고 자료

REF-424

Fragmentation Considered Vulnerable
Yossi Gilad, Amir Herzberg.
http://u.cs.biu.ac.il/~herzbea/security/12-03%20fragmentation.pdf

제출

이름	조직	날짜	출시일
CAPEC Content Team	The MITRE Corporation	2014-06-23 +00:00

수정 사항

이름	조직	날짜	댓글
CAPEC Content Team	The MITRE Corporation	2019-04-04 +00:00	Updated Related_Weaknesses

CAPEC-495 상세 정보

CAPEC-495