ICMP Attacks against TCP (RFC5927)
Original Publication Date: 2010-Jul-01
Included in the Prior Art Database: 2010-Jul-07
Internet Society Requests For Comment (RFCs)
ICMP [RFC0792] [RFC4443] is a fundamental part of the TCP/IP protocol suite, and is used mainly for reporting network error conditions. However, the current specifications do not recommend any kind of validation checks on the received ICMP error messages, thus allowing a variety of attacks against TCP [RFC0793] by means of ICMP, which include blind connection-reset, blind throughput-reduction, and blind performance-degrading attacks. All of these attacks can be performed even when the attacker is off-path, without the need to sniff the packets that correspond to the attacked TCP connection.
Internet Engineering Task Force (IETF) F. Gont Request for Comments: 5927 UTN/FRH Category: Informational July 2010 ISSN: 2070-1721
ICMP Attacks against TCP
This document discusses the use of the Internet Control Message Protocol (ICMP) to perform a variety of attacks against the Transmission Control Protocol (TCP). Additionally, this document describes a number of widely implemented modifications to TCP's handling of ICMP error messages that help to mitigate these issues.
Status of This Memo
This document is not an Internet Standards Track specification; it is published for informational purposes.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5927.
Gont Informational [Page 1]
RFC 5927 ICMP Attacks against TCP July 2010
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