CVE Vulnerabilities

CVE-2021-26717

Published: Feb 18, 2021 | Modified: Feb 24, 2021
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.

Affected Software

Name Vendor Start Version End Version
Asterisk Digium 16.0.0 *
Asterisk Digium 17.0.0 *
Asterisk Digium 18.0 *
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8
Certified_asterisk Digium 16.8 16.8

References