Double free vulnerability in apps/app_voicemail.c in Asterisk Open
Source 1.8.x before 188.8.131.52 and 10.x before 10.5.2, Certified
Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones
10.x.x-digiumphones before 10.5.2-digiumphones allows remote
authenticated users to cause a denial of service (daemon crash) by
establishing multiple voicemail sessions and accessing both the Urgent
mailbox and the INBOX mailbox.
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