CVE-2021-26713
Medium
Description
A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.
SeverityMedium
CVSS6.5
Exploit probability—
ProductDigium Asterisk
PublishedFeb 19, 2021
First seenFeb 19, 2021
How to fix
Update
- digium asterisk16.16.1, 17.9.2, 18.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| digium asterisk | 16.0.0 ≤ v < 16.16.1, 17.0.0 ≤ v < 17.9.2, 18.0.0 ≤ v < 18.2.1 | 16.16.1, 17.9.2, 18.2.1 |
| digium certified_asterisk | 16.8 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.