CVE-2019-13161

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).

• CWE-476

• http://downloads.digium.com/pub/security/AST-2019-003.htmlVendor Advisory
• https://issues.asterisk.org/jira/browse/ASTERISK-28465Issue Tracking, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List, Third Party Advisory
• http://downloads.digium.com/pub/security/AST-2019-003.htmlVendor Advisory
• https://issues.asterisk.org/jira/browse/ASTERISK-28465Issue Tracking, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List, Third Party Advisory

Published

Jul 12, 2019

Last Modified

Jun 17, 2026

Status

Modified

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