CVE-2019-13161
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.
Does this matter?
Lower severity and a low EPSS score (4.01%). Track it; it rarely justifies an emergency change on its own.
Description
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).
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.01% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- digium/certified asterisk · digium/asterisk · debian/debian linux
- Source
- cve@mitre.org
EPSS 4.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.