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in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character.","Type":"Description","Title":"CVE-2011-2665"},{"CveYear":"2011","CveId":"2665","Ordinal":"2","NoteData":"2011-07-06","Type":"Other","Title":"Published"},{"CveYear":"2011","CveId":"2665","Ordinal":"3","NoteData":"2011-09-07","Type":"Other","Title":"Modified"}]}}}