CVE-2012-3812: Digium Asterisk

Medium severity, CVSS 4.0. EPSS: 3.2% chance of exploitation in the next 30 days.

Double free vulnerability in apps/app_voicemail.c in Asterisk Open Source 1.8.x before 1.8.13.1 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.

Affected products

• Digium Asterisk: version 1.8.0 only; version 1.8.1 only; version 1.8.1.1 only; version 1.8.1.2 only; version 1.8.2 only; version 1.8.2.1 only; …
• Digium Asteriske: version 1.8.8.0 only; version 1.8.9.1 only
• Digium Certified Asterisk: version 1.8.11 only

Published 2012-07-09. Last modified 2026-06-16.