Denial of Service Vulnerability in libreswan's IKEv1 Implementation

CVE-2016-5361 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

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.

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