Servers and applications
CVE-2021-3618
ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS…
- Severity
- High 7.4
- Published
- 23 Mar 2022
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 21 Oct 2026
- Fixed in
- 1.21.0
- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
nginxServers and applications · cpe:a:f5:nginx |
|