CVE-2021-26712 Missing authorization in n/a
Remote unauthenticated attackers can terminate secure calls by replaying SRTP packets due to incorrect access controls in Asterisk.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-26712?
CVE-2021-26712 is a high-severity missing authorization vulnerability in Digium Asterisk, published on 18 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.
Which versions are affected by CVE-2021-26712?
It affects 2 products.
Products include Digium Asterisk, Digium Certified Asterisk.
How do I fix CVE-2021-26712?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-26712 being exploited?
There is no known exploitation of CVE-2021-26712 in the wild and no public exploit code.
Other vulnerabilities in Digium Asterisk
Sources
Also known as ALPINE-CVE-2021-26712, GHSA-5ph6-fxv2-7rf2, UBUNTU-CVE-2021-26712.