{"id":"CVE-2016-5361","details":"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.","modified":"2026-07-08T12:05:59.072444Z","published":"2016-06-16T14:59:51.890Z","references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2016/06/10/4"},{"type":"WEB","url":"https://lists.libreswan.org/pipermail/swan-dev/2016-March/001394.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-2603.html"},{"type":"FIX","url":"https://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libreswan/libreswan","events":[{"introduced":"0"},{"last_affected":"e3ddadd311a7943bae5a844048478abedd78db6d"},{"fixed":"152d6d95632d8b9477c170f1de99bcd86d7fb1d6"}],"database_specific":{"cpe":"cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"3.16"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v3.16","v3.16rc3","v3.16rc2","v3.14","v3.14rc3","v3.14rc2","v3.7","v3.6","v3.5","v3.4","v3.3","v3.1","v3.11dr1","v3.2rc1","v2.93","v2.92","libreswan-0.0.1","0.9.9","v2.6.38","v2.6.38rc2","v2.6.38rc1","v2.6.38dr2","v2.6.32","v2.6.37","v2.6.36","v2.6.36rc1","v2.6.36dr1","v2.6.35dr1","v2.6.34","v2.6.34rc6","v2.6.34rc5","v2.6.34rc2","v2.6.34rc1","v2.6.34dr2","v2.6.34dr1","v2.6.33rc1","v2.6.33dr2","v2.6.32rc9","v2.6.32rc8","v2.6.32rc7","v2.6.32rc6","v2.6.32rc5","v2.6.32rc3","v2.6.32rc1","v2.6.32dr5","v2.6.32dr4","v2.6.32dr3","v2.6.32dr1","v2.6.29rc2","v2.6.29","v2.6.28dr1","v2.6.27dr1","v2.6.26","v2.6.26rc1","v2.6.24","v2.6.24rc5","v2.6.24rc4","v2.6.24rc3","v2.6.24rc2","v2.6.23","v2.6.23dr1","v2.6.22dr1","v2.6.21","v2.6.20bis","v2.6.20rc2","v2.6.20","v2.6.19","v2.6.18","v2.6.18rc1","v2.6.16","v2.6.16dr5","v2.6.16dr4","v2.6.16dr3","v2.6.16dr2","v2.6.16dr1","v2.6.15","v2.6.15dr2","v2.6.14","v2.6.07","v2.6.03","v2.6.01","v2.5.03","v2.5.01","pre_FreeBSD_merge_200607"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-5361.json","vanir_signatures_modified":"2026-07-08T12:05:59Z","vanir_signatures":[{"id":"CVE-2016-5361-dd7ca340","signature_type":"Line","signature_version":"v1","source":"https://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6","target":{"file":"programs/pluto/ikev1.c"},"deprecated":false,"digest":{"line_hashes":["86627652806821049497760891271003665430","24201487968202576802260686202049093523","142477410369922442914278731243663070207","195996895018841027013861365178908799237","199365784008076806722690670567754263660","52319542269660515301921632493320412069","304808937194196592359069955689753404872","118760132748077652429291308902925545452","211774493758382654980443649852360948765","231585294691260960408558666364681762806","3644685348924904675938374493361824857","339878537889588885421261336996675171510","98931066176891567730705546114123706351","284659102604748356818408872773795585832","263710493929765914036940580108869563612","143853084601102197712553163232762326593"],"threshold":0.9}}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}