CVE-2019-13161: Debian Linux

Medium severity, CVSS 5.3. EPSS: 4% chance of exploitation in the next 30 days.

An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Digium Asterisk: from 13.0.0, before 13.27.1 (fixed in 13.27.1); from 15.0.0, before 15.7.3 (fixed in 15.7.3); from 16.0.0, before 16.4.1 (fixed in 16.4.1)
• Digium Certified Asterisk: version 1.8.0.0 only; version 1.8.1.0 only; version 1.8.2.0 only; version 1.8.3.0 only; version 1.8.4.0 only; version 1.8.5.0 only; …

Published 2019-07-12. Last modified 2026-06-17.