CVE-2010-1224: Digium Asterisk

Medium severity, CVSS 4.3. EPSS: 3.5% chance of exploitation in the next 30 days.

main/acl.c in Asterisk Open Source 1.6.0.x before 1.6.0.25, 1.6.1.x before 1.6.1.17, and 1.6.2.x before 1.6.2.5 does not properly enforce remote host access controls when CIDR notation "/0" is used in permit= and deny= configuration rules, which causes an improper arithmetic shift and might allow remote attackers to bypass ACL rules and access services from unauthorized hosts.

Affected products

• Digium Asterisk: version 1.6.0 only; version 1.6.0.1 only; version 1.6.0.2 only; version 1.6.0.3 only; version 1.6.0.5 only; version 1.6.0.6 only; …

Published 2010-04-01. Last modified 2026-06-16.