Tracker / CVE-2021-3618
CVE-2021-3618
High 7.4
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 and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.
Affected products and versions
| debian | debian_linux |
|---|---|
| f5 | nginx · … → 1.21.0 |
| fedoraproject | fedora |
| sendmail | sendmail · … → 8.17 |
| vsftpd_project | vsftpd · … → 3.0.4 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.