Description
An exploitable denial-of-service vulnerability exists in the way CoTURN 4.5.1.1 web server parses POST requests. A specially crafted HTTP POST request can lead to server crash and denial of service. An attacker needs to send an HTTP request to trigger this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | CoTURN | CoTURN 4.5.1.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | coturn | 4.5.1.1-1.2 | — |
| Debian 13 | coturn | 4.5.1.1-1.2 | — |
| Debian 12 | coturn | 4.5.1.1-1.2 | — |
| Debian 10 | coturn | 4.5.1.1-1.1+deb10u1 | DSA-4711-1 |
| Debian 9 | coturn | 4.5.0.5-1+deb9u2 | DSA-4711-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | coturn | 4.5.1.1-1.1ubuntu0.20.04.1 | USN-4415-1 |
| Ubuntu 18.04 LTS | coturn | 4.5.0.7-1ubuntu2.18.04.2 | USN-4415-1 |
| Ubuntu 16.04 LTS | coturn | 4.5.0.3-1ubuntu0.3 | USN-4415-1 |
Advisories 2
- DSA-4711-1 coturn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-4415-1 coturn vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- FEDORA-2020-f3fcb1608a vendor-advisory
- FEDORA-2020-305c173af8 vendor-advisory
- FEDORA-2020-6efa0fc869 vendor-advisory
- DSA-4711 vendor-advisory
- USN-4415-1 vendor-advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-0985