Description
An issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.
References (6)
Core 6
Core References
Vendor Advisory x_refsource_misc
https://www.asterisk.org/downloads/security-advisories
Third Party Advisory x_refsource_misc
https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1
Third Party Advisory, VDB Entry x_refsource_misc
https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html
Mailing List, Third Party Advisory x_refsource_misc
https://seclists.org/fulldisclosure/2019/Nov/20
Vendor Advisory x_refsource_confirm
http://downloads.asterisk.org/pub/security/AST-2019-008.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
Scores
CVSS v3
7.5
EPSS
0.0668
EPSS Percentile
93.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (3)
debian/debian_linux
9.0
digium/asterisk
13.0.0 - 13.29.1
digium/certified_asterisk
13.21 (5 CPE variants)
Published
Nov 22, 2019
Tracked Since
Feb 18, 2026