CVE-2021-26717
HIGH7.5EPSS 0.42%Published: 2/18/2021Modified: 12/3/2025
Also known as:ALPINE-CVE-2021-26717
Description
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 packages (2)
- Alpine/asteriskfrom 0, < 16.16.1-r0
- Debian/asteriskfrom 0, < 1:16.16.1~dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |