CVE-2021-3618 log

Severity Medium
Remote Yes
Type Insufficient validation
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.
Group Package Affected Fixed Severity Status Ticket
AVG-2102 nginx 1.20.1-1 Medium Vulnerable
AVG-2101 vsftpd 3.0.3-7 Medium Vulnerable
AVG-2103 nginx-mainline 1.19.10-1 1.21.0-1 Medium Fixed