CVE-2012-3863: Digium Asterisk

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

channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Asterisk Business Edition C.3.x before C.3.7.5, Certified Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones 10.x.x-digiumphones before 10.5.2-digiumphones does not properly handle a provisional response to a SIP reINVITE request, which allows remote authenticated users to cause a denial of service (RTP port exhaustion) via sessions that lack final responses.

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 Asterisk Business Edition: version c.3.1 only; version c.3.3 only; version c.3.7.4 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.