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CVE-2016-5361

Status Candidate

Overview

programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet. NOTE: the original behavior complies with the IKEv1 protocol, but has a required security update from the libreswan vendor; as of 2016-06-10, it is expected that several other IKEv1 implementations will have vendor-required security updates, with separate CVE IDs assigned to each.

Related Files

Red Hat Security Advisory 2016-2603-02
Posted Nov 4, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-2603-02 - Libreswan is an implementation of IPsec & IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks such as virtual private network. Security Fix: A traffic amplification flaw was found in the Internet Key Exchange version 1 protocol. A remote attacker could use a libreswan server with IKEv1 enabled in a network traffic amplification denial of service attack against other hosts on the network by sending UDP packets with a spoofed source address to that server.

tags | advisory, remote, denial of service, udp, spoof, protocol
systems | linux, redhat
advisories | CVE-2016-5361
SHA-256 | 05b3b2e28657d631cce895e8b1e65bc1175b969ca8f48872019bea4b4749f5b9
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