CVE-2013-7100: Digium Asterisk

Medium severity, CVSS 5.0. EPSS: 4.3% chance of exploitation in the next 30 days.

Buffer overflow in the unpacksms16 function in apps/app_sms.c in Asterisk Open Source 1.8.x before 1.8.24.1, 10.x before 10.12.4, and 11.x before 11.6.1; Asterisk with Digiumphones 10.x-digiumphones before 10.12.4-digiumphones; and Certified Asterisk 1.8.x before 1.8.15-cert4 and 11.x before 11.2-cert3 allows remote attackers to cause a denial of service (daemon crash) via a 16-bit SMS message with an odd number of bytes, which triggers an infinite loop.

Affected products

• Digium Asterisk: version 1.8.17.0 only; version 1.8.18.0 only; version 1.8.18.1 only; version 1.8.19.0 only; version 1.8.19.1 only; version 1.8.20.0 only; …
• Digium Asterisk Digiumphones: version 10.0.0 only; version 10.11.0 only; version 10.12.0 only; version 10.12.1 only; version 10.12.2 only
• Digium Certified Asterisk: version 1.8.15 only; version 11.2.0 only

Published 2013-12-19. Last modified 2026-06-17.